diff --git a/examples/colored_diffs.png b/examples/colored_diffs.png
index 11cc179..7087e31 100644
Binary files a/examples/colored_diffs.png and b/examples/colored_diffs.png differ
diff --git a/src/bigdecimal/tests.rs b/src/bigdecimal/tests.rs
index 8f4e80d..c56ecc9 100644
--- a/src/bigdecimal/tests.rs
+++ b/src/bigdecimal/tests.rs
@@ -27,7 +27,7 @@ fn verify_bigdecimal_is_equal_to_other_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected subject to be equal to BigDecimal(sign=Minus, scale=3, digits=[42831])
+            r"expected subject to be equal to BigDecimal(sign=Minus, scale=3, digits=[42831])
    but was: BigDecimal(sign=Plus, scale=3, digits=[42831])
   expected: BigDecimal(sign=Minus, scale=3, digits=[42831])
 "
@@ -181,7 +181,7 @@ fn verify_bigdecimalref_is_equal_to_other_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected subject to be equal to BigDecimalRef { sign: Minus, digits: 42831, scale: 3 }
+            r"expected subject to be equal to BigDecimalRef { sign: Minus, digits: 42831, scale: 3 }
    but was: BigDecimalRef { sign: Plus, digits: 42831, scale: 3 }
   expected: BigDecimalRef { sign: Minus, digits: 42831, scale: 3 }
 "
@@ -264,12 +264,10 @@ fn verify_bigdecimal_has_precision_of_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to have a precision of 7
+        &[r"expected subject to have a precision of 7
    but was: 9
   expected: 7
-"
-        ]
+"]
     );
 }
 
@@ -299,7 +297,7 @@ fn verify_bigdecimal_has_scale_of_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected subject to have a scale of 5
+        &[r"expected subject to have a scale of 5
    but was: 2
   expected: 5
 "]
@@ -335,7 +333,7 @@ fn verify_bigdecimal_is_integer_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected subject to be an integer value
+        &[r"expected subject to be an integer value
    but was: BigDecimal(sign=Plus, scale=2, digits=[420810])
   expected: an integer value
 "]
diff --git a/src/boolean/tests.rs b/src/boolean/tests.rs
index e9d15c7..afa9bd7 100644
--- a/src/boolean/tests.rs
+++ b/src/boolean/tests.rs
@@ -23,12 +23,10 @@ fn verify_bool_is_not_equal_to_false_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be not equal to false
+        &[r"expected my_thing to be not equal to false
    but was: false
   expected: not false
-"
-        ]
+"]
     );
 }
 
@@ -49,7 +47,7 @@ fn verify_bool_is_true_fails() {
             .named("my_thing")
             .is_true()
             .display_failures(),
-        &[r"assertion failed: expected my_thing to be true
+        &[r"expected my_thing to be true
    but was: false
   expected: true
 "]
@@ -65,7 +63,7 @@ fn verify_bool_is_false_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be false
+        &[r"expected my_thing to be false
    but was: true
   expected: false
 "]
@@ -85,7 +83,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to be true\n   \
+            &["expected subject to be true\n   \
                but was: \u{1b}[31mfalse\u{1b}[0m\n  \
               expected: \u{1b}[32mtrue\u{1b}[0m\n\
             "]
@@ -101,7 +99,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to be false\n   \
+            &["expected subject to be false\n   \
                but was: \u{1b}[31mtrue\u{1b}[0m\n  \
               expected: \u{1b}[33mfalse\u{1b}[0m\n\
             "]
diff --git a/src/char/tests.rs b/src/char/tests.rs
index 9bbe2f0..8899b35 100644
--- a/src/char/tests.rs
+++ b/src/char/tests.rs
@@ -12,7 +12,7 @@ fn verify_char_is_lowercase_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected subject to be lowercase
+        &[r"expected subject to be lowercase
    but was: M
   expected: m
 "]
@@ -30,7 +30,7 @@ fn verify_borrowed_char_is_lowercase_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected subject to be lowercase
+        &[r"expected subject to be lowercase
    but was: M
   expected: m
 "]
@@ -48,7 +48,7 @@ fn verify_char_is_uppercase_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected subject to be uppercase
+        &[r"expected subject to be uppercase
    but was: k
   expected: K
 "]
@@ -66,7 +66,7 @@ fn verify_borrowed_char_is_uppercase_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected subject to be uppercase
+        &[r"expected subject to be uppercase
    but was: x
   expected: X
 "]
@@ -84,12 +84,10 @@ fn verify_char_is_ascii_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to be an ASCII character
+        &[r"expected subject to be an ASCII character
    but was: €
   expected: an ASCII character
-"
-        ]
+"]
     );
 }
 
@@ -104,12 +102,10 @@ fn verify_borrowed_char_is_ascii_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to be an ASCII character
+        &[r"expected subject to be an ASCII character
    but was: ❤
   expected: an ASCII character
-"
-        ]
+"]
     );
 }
 
@@ -124,12 +120,10 @@ fn verify_char_is_alphabetic_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to be an alphabetic character
+        &[r"expected subject to be an alphabetic character
    but was: 1
   expected: an alphabetic character
-"
-        ]
+"]
     );
 }
 
@@ -144,12 +138,10 @@ fn verify_borrowed_char_is_alphabetic_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to be an alphabetic character
+        &[r"expected subject to be an alphabetic character
    but was: @
   expected: an alphabetic character
-"
-        ]
+"]
     );
 }
 
@@ -165,12 +157,10 @@ fn verify_char_is_alphanumeric_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to be an alphanumeric character
+        &[r"expected subject to be an alphanumeric character
    but was: @
   expected: an alphanumeric character
-"
-        ]
+"]
     );
 }
 
@@ -186,12 +176,10 @@ fn verify_borrowed_char_is_alphanumeric_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to be an alphanumeric character
+        &[r"expected subject to be an alphanumeric character
    but was: +
   expected: an alphanumeric character
-"
-        ]
+"]
     );
 }
 
@@ -206,12 +194,10 @@ fn verify_char_is_control_char_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to be a control character
+        &[r"expected subject to be a control character
    but was: [
   expected: a control character
-"
-        ]
+"]
     );
 }
 
@@ -226,12 +212,10 @@ fn verify_borrowed_char_is_control_char_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to be a control character
+        &[r"expected subject to be a control character
    but was: @
   expected: a control character
-"
-        ]
+"]
     );
 }
 
@@ -246,12 +230,10 @@ fn verify_char_is_digit_in_radix_10_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to be a digit in the radix 10
+        &[r"expected subject to be a digit in the radix 10
    but was: A
   expected: a digit in the radix 10
-"
-        ]
+"]
     );
 }
 
@@ -266,12 +248,10 @@ fn verify_borrowed_char_is_digit_in_radix_10_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to be a digit in the radix 10
+        &[r"expected subject to be a digit in the radix 10
    but was: F
   expected: a digit in the radix 10
-"
-        ]
+"]
     );
 }
 
@@ -286,12 +266,10 @@ fn verify_char_is_digit_in_radix_16_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to be a digit in the radix 16
+        &[r"expected subject to be a digit in the radix 16
    but was: G
   expected: a digit in the radix 16
-"
-        ]
+"]
     );
 }
 
@@ -306,12 +284,10 @@ fn verify_borrowed_char_is_digit_in_radix_16_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to be a digit in the radix 16
+        &[r"expected subject to be a digit in the radix 16
    but was: g
   expected: a digit in the radix 16
-"
-        ]
+"]
     );
 }
 
@@ -326,12 +302,10 @@ fn verify_char_is_digit_in_radix_7_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to be a digit in the radix 7
+        &[r"expected subject to be a digit in the radix 7
    but was: 7
   expected: a digit in the radix 7
-"
-        ]
+"]
     );
 }
 
@@ -346,12 +320,10 @@ fn verify_borrowed_char_is_digit_in_radix_7_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to be a digit in the radix 7
+        &[r"expected subject to be a digit in the radix 7
    but was: 9
   expected: a digit in the radix 7
-"
-        ]
+"]
     );
 }
 
@@ -366,7 +338,7 @@ fn verify_char_is_whitespace_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected subject to be whitespace
+        &[r"expected subject to be whitespace
    but was: _
   expected: whitespace
 "]
@@ -384,7 +356,7 @@ fn verify_borrowed_char_is_whitespace_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected subject to be whitespace
+        &[r"expected subject to be whitespace
    but was: =
   expected: whitespace
 "]
diff --git a/src/colored/tests.rs b/src/colored/tests.rs
index a45c53e..83226f1 100644
--- a/src/colored/tests.rs
+++ b/src/colored/tests.rs
@@ -60,7 +60,7 @@ mod with_colored_feature {
             .display_failures();
 
         assert_eq!(failures, &[
-            "assertion failed: expected subject to be equal to Some(Foo { lorem: \"Hello World!\", ipsum: 42, dolor: Some(\"hey ho!\") })\n   \
+            "expected subject to be equal to Some(Foo { lorem: \"Hello World!\", ipsum: 42, dolor: Some(\"hey ho!\") })\n   \
                  but was: Some(Foo { lorem: \"\u{1b}[31m¡\u{1b}[0mH\u{1b}[31mo\u{1b}[0ml\u{1b}[31ma,\u{1b}[0m W\u{1b}[31me\u{1b}[0ml\u{1b}[31mt\u{1b}[0m!\", ipsum: 42, dolor: Some(\"hey\") })\n  \
                expected: Some(Foo { lorem: \"H\u{1b}[32me\u{1b}[0ml\u{1b}[32mlo\u{1b}[0m W\u{1b}[32mor\u{1b}[0ml\u{1b}[32md\u{1b}[0m!\", ipsum: 42, dolor: Some(\"hey\u{1b}[32m ho!\u{1b}[0m\") })\n\
             ",
diff --git a/src/error/tests.rs b/src/error/tests.rs
index 8681f8e..0155b2f 100644
--- a/src/error/tests.rs
+++ b/src/error/tests.rs
@@ -59,7 +59,7 @@ fn verify_error_has_debug_message_fails() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected subject to have debug message "SuperError { source: Bar }"
+            r#"expected subject to have debug message "SuperError { source: Bar }"
    but was: SuperError { source: Foo }
   expected: SuperError { source: Bar }
 "#
@@ -89,7 +89,7 @@ fn verify_error_does_not_have_debug_message_fails() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected subject to not have debug message "SuperError { source: Bar }"
+            r#"expected subject to not have debug message "SuperError { source: Bar }"
    but was: SuperError { source: Bar }
   expected: not SuperError { source: Bar }
 "#
@@ -119,7 +119,7 @@ fn verify_error_has_display_message_fails() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected subject to have display message "super-error caused by bar error"
+            r#"expected subject to have display message "super-error caused by bar error"
    but was: "super-error caused by foo error"
   expected: "super-error caused by bar error"
 "#
@@ -149,7 +149,7 @@ fn verify_error_does_not_have_display_message_fails() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected subject to not have display message "super-error caused by foo error"
+            r#"expected subject to not have display message "super-error caused by foo error"
    but was: "super-error caused by foo error"
   expected: not "super-error caused by foo error"
 "#
@@ -177,7 +177,7 @@ fn verify_error_has_no_source_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my error to have no source
+        &[r"expected my error to have no source
    but was: SuperError { source: Foo }
   expected: <error with no source>
 "]
@@ -204,7 +204,7 @@ fn verify_error_has_source_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my error to have a source
+        &[r"expected my error to have a source
    but was: Bar
   expected: <error with some source>
 "]
@@ -234,7 +234,7 @@ fn verify_error_has_source_message_fails_wrong_source() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my error to have a source message equal to "foo error"
+            r#"expected my error to have a source message equal to "foo error"
    but was: "bar error"
   expected: "foo error"
 "#
@@ -254,7 +254,7 @@ fn verify_error_has_source_message_fails_error_without_source() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my error to have a source message equal to "foo error"
+            r#"expected my error to have a source message equal to "foo error"
    but was: Foo - which has no source
   expected: "foo error"
 "#
@@ -292,7 +292,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to have no source\n   \
+            &["expected subject to have no source\n   \
                 but was: \u{1b}[31mSuperError { source: Foo }\u{1b}[0m\n  \
                expected: \u{1b}[33m<error with no source>\u{1b}[0m\n\
             "]
@@ -310,7 +310,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to have a source\n   \
+            &["expected subject to have a source\n   \
                 but was: \u{1b}[31mFoo\u{1b}[0m\n  \
                expected: \u{1b}[33m<error with some source>\u{1b}[0m\n\
             "]
@@ -331,7 +331,7 @@ mod colored {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected subject to have a source message equal to \"foo error\"\n   \
+                "expected subject to have a source message equal to \"foo error\"\n   \
                     but was: \"\u{1b}[31mbar error\u{1b}[0m\"\n  \
                    expected: \"\u{1b}[33mfoo error\u{1b}[0m\"\n\
             "
@@ -351,7 +351,7 @@ mod colored {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected subject to have a source message equal to \"foo error\"\n   \
+                "expected subject to have a source message equal to \"foo error\"\n   \
                     but was: \u{1b}[31mFoo\u{1b}[0m - which has no source\n  \
                    expected: \u{1b}[33m\"foo error\"\u{1b}[0m\n\
             "
diff --git a/src/expectation_combinators/tests.rs b/src/expectation_combinators/tests.rs
index a5e5095..82e8f4b 100644
--- a/src/expectation_combinators/tests.rs
+++ b/src/expectation_combinators/tests.rs
@@ -80,7 +80,7 @@ fn verify_all_combinator_asserts_2_expectations_fails() {
 
     assert_eq!(
         failures,
-        &["assertion failed: expected subject to be negative\n   \
+        &["expected subject to be negative\n   \
                 but was: 42\n  \
                expected: < 0\n\
              expected subject to be zero\n   \
@@ -115,7 +115,7 @@ fn verify_all_combinator_asserts_3_expectations_fails() {
 
     assert_eq!(
         failures,
-        &["assertion failed: expected subject to be positive\n   \
+        &["expected subject to be positive\n   \
                 but was: -42\n  \
                expected: > 0\n\
              expected subject to be between 41 and 43\n   \
@@ -152,7 +152,7 @@ fn verify_all_combinator_asserts_4_expectations_fails() {
 
     assert_eq!(
         failures,
-        &["assertion failed: expected subject to be positive\n   \
+        &["expected subject to be positive\n   \
                 but was: -42\n  \
                expected: > 0\n\
              expected subject to be greater than 2\n   \
@@ -255,12 +255,10 @@ fn verify_any_combinator_asserts_1_expectations_fails() {
 
     assert_eq!(
         failures,
-        &[
-            "assertion failed: expected subject to contain \"fugiaty\"\n   \
+        &["expected subject to contain \"fugiaty\"\n   \
                 but was: \"nulla elit fugiat reprehenderit\"\n  \
                expected: \"fugiaty\"\n\
-           \n"
-        ]
+           \n"]
     );
 }
 
@@ -291,15 +289,13 @@ fn verify_any_combinator_asserts_2_expectations_fails() {
 
     assert_eq!(
         failures,
-        &[
-            "assertion failed: expected subject to contain \"fugiaty\"\n   \
+        &["expected subject to contain \"fugiaty\"\n   \
                 but was: \"nulla elit fugiat reprehenderit\"\n  \
                expected: \"fugiaty\"\n\
              expected subject to contain \"ellit\"\n   \
                 but was: \"nulla elit fugiat reprehenderit\"\n  \
                expected: \"ellit\"\n\
-           \n"
-        ]
+           \n"]
     );
 }
 
@@ -336,8 +332,7 @@ fn verify_any_combinator_asserts_3_expectations_fails() {
 
     assert_eq!(
         failures,
-        &[
-            "assertion failed: expected subject to contain \"fugiaty\"\n   \
+        &["expected subject to contain \"fugiaty\"\n   \
                 but was: \"nulla elit fugiat reprehenderit\"\n  \
                expected: \"fugiaty\"\n\
              expected subject to contain \"ellit\"\n   \
@@ -346,8 +341,7 @@ fn verify_any_combinator_asserts_3_expectations_fails() {
              expected subject to contain any of ['x', 'y', 'z']\n   \
                 but was: \"nulla elit fugiat reprehenderit\"\n  \
                expected: ['x', 'y', 'z']\n\
-           \n"
-        ]
+           \n"]
     );
 }
 
diff --git a/src/float/tests.rs b/src/float/tests.rs
index 326a2f2..76e15fe 100644
--- a/src/float/tests.rs
+++ b/src/float/tests.rs
@@ -35,7 +35,7 @@ fn verify_f64_is_negative_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be negative
+        &[r"expected some_number to be negative
    but was: 0.0
   expected: < 0
 "]
@@ -79,7 +79,7 @@ fn verify_f64_is_not_negative_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be not negative
+        &[r"expected some_number to be not negative
    but was: -0.001
   expected: >= 0
 "]
@@ -119,7 +119,7 @@ fn verify_f64_is_positive_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be positive
+        &[r"expected some_number to be positive
    but was: 0.0
   expected: > 0
 "]
@@ -163,7 +163,7 @@ fn verify_f64_is_not_positive_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be not positive
+        &[r"expected some_number to be not positive
    but was: 0.001
   expected: <= 0
 "]
@@ -199,7 +199,7 @@ fn verify_f64_is_zero_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be zero
+        &[r"expected some_number to be zero
    but was: 1.0
   expected: 0.0
 "]
@@ -235,7 +235,7 @@ fn verify_f64_is_one_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be one
+        &[r"expected some_number to be one
    but was: 0.0
   expected: 1.0
 "]
@@ -285,7 +285,7 @@ fn verify_f64_is_finite_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be finite
+        &[r"expected some_number to be finite
    but was: -inf
   expected: a finite number
 "]
@@ -320,7 +320,7 @@ fn verify_f64_is_infinite_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be infinite
+        &[r"expected some_number to be infinite
    but was: 0.0
   expected: an infinite number
 "]
@@ -374,7 +374,7 @@ fn verify_f64_is_a_number_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be a number
+        &[r"expected some_number to be a number
    but was: NaN
   expected: a number
 "]
@@ -395,7 +395,7 @@ fn verify_f32_is_not_a_number_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be not a number
+        &[r"expected some_number to be not a number
    but was: 0.0
   expected: NaN
 "]
@@ -427,7 +427,7 @@ fn verify_f64_is_not_a_number_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be not a number
+        &[r"expected some_number to be not a number
    but was: 0.0
   expected: NaN
 "]
@@ -452,7 +452,7 @@ mod cmp {
 
         assert_eq!(
             failures,
-            &[r"assertion failed: expected tau / 2 to be close to 3.15
+            &[r"expected tau / 2 to be close to 3.15
   within a margin of epsilon=4.7683716e-7 and ulps=4
    but was: 3.14
   expected: 3.15
@@ -474,7 +474,7 @@ mod cmp {
 
         assert_eq!(
             failures,
-            &[r"assertion failed: expected tau / 2 to be not close to 3.14
+            &[r"expected tau / 2 to be not close to 3.14
   within a margin of epsilon=4.7683716e-7 and ulps=4
    but was: 3.14
   expected: 3.14
@@ -496,7 +496,7 @@ mod cmp {
 
         assert_eq!(
             failures,
-            &[r"assertion failed: expected tau / 2 to be close to 3.15
+            &[r"expected tau / 2 to be close to 3.15
   within a margin of epsilon=2.3841858e-7 and ulps=3
    but was: 3.14
   expected: 3.15
@@ -518,7 +518,7 @@ mod cmp {
 
         assert_eq!(
             failures,
-            &[r"assertion failed: expected tau / 2 to be not close to 3.14
+            &[r"expected tau / 2 to be not close to 3.14
   within a margin of epsilon=2.3841858e-7 and ulps=3
    but was: 3.14
   expected: 3.14
@@ -540,7 +540,7 @@ mod cmp {
 
         assert_eq!(
             failures,
-            &[r"assertion failed: expected tau / 2 to be close to 3.15
+            &[r"expected tau / 2 to be close to 3.15
   within a margin of epsilon=8.881784197001252e-16 and ulps=4
    but was: 3.14
   expected: 3.15
@@ -562,7 +562,7 @@ mod cmp {
 
         assert_eq!(
             failures,
-            &[r"assertion failed: expected tau / 2 to be not close to 3.14
+            &[r"expected tau / 2 to be not close to 3.14
   within a margin of epsilon=8.881784197001252e-16 and ulps=4
    but was: 3.14
   expected: 3.14
@@ -584,7 +584,7 @@ mod cmp {
 
         assert_eq!(
             failures,
-            &[r"assertion failed: expected tau / 2 to be close to 3.15
+            &[r"expected tau / 2 to be close to 3.15
   within a margin of epsilon=4.440892098500626e-16 and ulps=3
    but was: 3.14
   expected: 3.15
@@ -606,7 +606,7 @@ mod cmp {
 
         assert_eq!(
             failures,
-            &[r"assertion failed: expected tau / 2 to be not close to 3.14
+            &[r"expected tau / 2 to be not close to 3.14
   within a margin of epsilon=4.440892098500626e-16 and ulps=3
    but was: 3.14
   expected: 3.14
@@ -627,13 +627,11 @@ mod cmp {
 
             assert_eq!(
                 failures,
-                &[
-                    "assertion failed: expected subject to be close to 3.15148\n  \
+                &["expected subject to be close to 3.15148\n  \
                 within a margin of epsilon=2.3841858e-7 and ulps=3\n   \
                  but was: 3.1\u{1b}[31m41\u{1b}[0m5\u{1b}[31m9\u{1b}[0m\n  \
                 expected: 3.15\u{1b}[34m148\u{1b}[0m\n\
-            "
-                ]
+            "]
             );
         }
 
@@ -646,13 +644,11 @@ mod cmp {
 
             assert_eq!(
                 failures,
-                &[
-                    "assertion failed: expected subject to be close to 3.15148\n  \
+                &["expected subject to be close to 3.15148\n  \
                 within a margin of epsilon=4.440892098500626e-16 and ulps=3\n   \
                  but was: 3.1\u{1b}[31m41\u{1b}[0m5\u{1b}[31m9\u{1b}[0m\n  \
                 expected: 3.15\u{1b}[34m148\u{1b}[0m\n\
-            "
-                ]
+            "]
             );
         }
     }
diff --git a/src/integer/tests.rs b/src/integer/tests.rs
index 6c87666..e4df857 100644
--- a/src/integer/tests.rs
+++ b/src/integer/tests.rs
@@ -37,7 +37,7 @@ fn verify_i32_is_equal_to_i32_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be equal to -42
+        &[r"expected my_thing to be equal to -42
    but was: 42
   expected: -42
 "]
@@ -101,7 +101,7 @@ fn verify_i32_is_negative_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be negative
+        &[r"expected some_number to be negative
    but was: 0
   expected: < 0
 "]
@@ -173,7 +173,7 @@ fn verify_i32_is_not_negative_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be not negative
+        &[r"expected some_number to be not negative
    but was: -1
   expected: >= 0
 "]
@@ -237,7 +237,7 @@ fn verify_i32_is_positive_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be positive
+        &[r"expected some_number to be positive
    but was: 0
   expected: > 0
 "]
@@ -309,7 +309,7 @@ fn verify_i32_is_not_positive_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be not positive
+        &[r"expected some_number to be not positive
    but was: 1
   expected: <= 0
 "]
@@ -390,7 +390,7 @@ fn verify_u64_is_zero_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be zero
+        &[r"expected some_number to be zero
    but was: 1
   expected: 0
 "]
@@ -471,7 +471,7 @@ fn verify_u64_is_one_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected some_number to be one
+        &[r"expected some_number to be one
    but was: 0
   expected: 1
 "]
@@ -491,7 +491,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to be equal to 42\n   \
+            &["expected subject to be equal to 42\n   \
                but was: \u{1b}[31m37\u{1b}[0m\n  \
               expected: \u{1b}[34m42\u{1b}[0m\n\
             "]
@@ -507,12 +507,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to be not equal to 42\n   \
+            &["expected subject to be not equal to 42\n   \
                but was: 42\n  \
               expected: not 42\n\
-            "
-            ]
+            "]
         );
     }
 }
diff --git a/src/iterator/tests.rs b/src/iterator/tests.rs
index 3d28731..3194bfb 100644
--- a/src/iterator/tests.rs
+++ b/src/iterator/tests.rs
@@ -97,7 +97,7 @@ fn verify_custom_collection_contains_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to contain 42
+        &[r"expected my_thing to contain 42
    but was: [1, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43]
   expected: 42
 "]
@@ -128,7 +128,7 @@ fn verify_custom_iterator_contains_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to contain 42
+        &[r"expected my_thing to contain 42
    but was: [1, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43]
   expected: 42
 "]
@@ -160,7 +160,7 @@ fn verify_custom_collection_does_not_contain_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to not contain 19
+        &[r"expected my_thing to not contain 19
    but was: [1, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43]
   expected: not 19
 "]
@@ -194,7 +194,7 @@ fn verify_custom_iterator_does_not_contain_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to not contain 19
+        &[r"expected my_thing to not contain 19
    but was: [1, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43]
   expected: not 19
 "]
diff --git a/src/lib.rs b/src/lib.rs
index 21a6d7e..727a763 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -59,7 +59,7 @@
 //! will print the error message:
 //!
 //! ```console
-//! assertion failed: expected 6 * 8 - 5 to be equal to 42
+//! expected 6 * 8 - 5 to be equal to 42
 //!    but was: 43
 //!   expected: 42
 //! ```
@@ -149,11 +149,11 @@
 //! assertions in the panic message:
 //!
 //! ```console
-//! assertion failed: expected subject to contain "unimportant"
+//! expected subject to contain "unimportant"
 //!    but was: "the answer to all important questions is 42"
 //!   expected: "unimportant"
 //!
-//! assertion failed: expected subject to have at most a length of 41
+//! expected subject to have at most a length of 41
 //!    but was: 43
 //!   expected: <= 41
 //! ```
@@ -319,7 +319,7 @@
 //! let failures = verify_that!(7 * 5).is_equal_to(42).display_failures();
 //!
 //! assert_that!(failures).contains_exactly([
-//!     r"assertion failed: expected 7 * 5 to be equal to 42
+//!     r"expected 7 * 5 to be equal to 42
 //!    but was: 35
 //!   expected: 42
 //! "
diff --git a/src/map/tests.rs b/src/map/tests.rs
index b857d0d..f04e974 100644
--- a/src/map/tests.rs
+++ b/src/map/tests.rs
@@ -88,7 +88,7 @@ mod hashbrown {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to contain the key 7
+                r"expected foo_map to contain the key 7
    but was: {formatted_actual}
   expected: 7
 "
@@ -116,7 +116,7 @@ mod hashbrown {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to not contain the key 5
+                r"expected foo_map to not contain the key 5
    but was: {formatted_actual}
   expected: not 5
 "
@@ -158,7 +158,7 @@ mod hashbrown {
         assert_eq!(
             failures,
             &[format!(
-                r#"assertion failed: expected foo_map to contain the value "six"
+                r#"expected foo_map to contain the value "six"
    but was: {formatted_actual}
   expected: "six"
 "#
@@ -186,7 +186,7 @@ mod hashbrown {
         assert_eq!(
             failures,
             &[format!(
-                r#"assertion failed: expected foo_map to not contain the value "five"
+                r#"expected foo_map to not contain the value "five"
    but was: {formatted_actual}
   expected: not "five"
 "#
@@ -214,7 +214,7 @@ mod hashbrown {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to contain the keys [5, 3, 4]
+                r"expected foo_map to contain the keys [5, 3, 4]
    but was: {formatted_actual}
   expected: [5, 3, 4]
    missing: [3]
@@ -236,7 +236,7 @@ mod hashbrown {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to contain the keys [5, 3, 4]
+                r"expected foo_map to contain the keys [5, 3, 4]
    but was: {formatted_actual}
   expected: [5, 3, 4]
    missing: [3]
@@ -258,7 +258,7 @@ mod hashbrown {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to contain the keys [5, 3, 4]
+                r"expected foo_map to contain the keys [5, 3, 4]
    but was: {formatted_actual}
   expected: [5, 3, 4]
    missing: [3]
@@ -287,7 +287,7 @@ mod hashbrown {
         assert_eq!(
             failures,
             &[format!(
-                r#"assertion failed: expected foo_map to contain the values ["one", "two", "three"]
+                r#"expected foo_map to contain the values ["one", "two", "three"]
    but was: {formatted_actual}
   expected: ["one", "two", "three"]
    missing: ["two", "three"]
@@ -323,7 +323,7 @@ mod hashbrown {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to not contain the keys [5, 3, 4]
+                r"expected foo_map to not contain the keys [5, 3, 4]
    but was: {formatted_actual}
   expected: [5, 3, 4]
      extra: {formatted_extra}
@@ -352,7 +352,7 @@ mod hashbrown {
         assert_eq!(
             failures,
             &[format!(
-                r#"assertion failed: expected foo_map to not contain the values ["one", "two", "three"]
+                r#"expected foo_map to not contain the values ["one", "two", "three"]
    but was: {formatted_actual}
   expected: ["one", "two", "three"]
      extra: ["one"]
@@ -388,7 +388,7 @@ mod hashbrown {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to contain exactly the keys [5, 2, 6, 3]
+                r"expected foo_map to contain exactly the keys [5, 2, 6, 3]
    but was: {formatted_actual}
   expected: [5, 2, 6, 3]
    missing: [2, 3]
@@ -489,7 +489,7 @@ mod std_hash_map {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to contain the key 7
+                r"expected foo_map to contain the key 7
    but was: {formatted_actual}
   expected: 7
 "
@@ -517,7 +517,7 @@ mod std_hash_map {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to not contain the key 4
+                r"expected foo_map to not contain the key 4
    but was: {formatted_actual}
   expected: not 4
 "
@@ -559,7 +559,7 @@ mod std_hash_map {
         assert_eq!(
             failures,
             &[format!(
-                r#"assertion failed: expected foo_map to contain the value "six"
+                r#"expected foo_map to contain the value "six"
    but was: {formatted_actual}
   expected: "six"
 "#
@@ -587,7 +587,7 @@ mod std_hash_map {
         assert_eq!(
             failures,
             &[format!(
-                r#"assertion failed: expected foo_map to not contain the value "four"
+                r#"expected foo_map to not contain the value "four"
    but was: {formatted_actual}
   expected: not "four"
 "#
@@ -615,7 +615,7 @@ mod std_hash_map {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to contain the keys [2, 3, 5]
+                r"expected foo_map to contain the keys [2, 3, 5]
    but was: {formatted_actual}
   expected: [2, 3, 5]
    missing: [2, 3]
@@ -637,7 +637,7 @@ mod std_hash_map {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to contain the keys [2, 3, 5]
+                r"expected foo_map to contain the keys [2, 3, 5]
    but was: {formatted_actual}
   expected: [2, 3, 5]
    missing: [2, 3]
@@ -659,7 +659,7 @@ mod std_hash_map {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to contain the keys [2, 3, 5]
+                r"expected foo_map to contain the keys [2, 3, 5]
    but was: {formatted_actual}
   expected: [2, 3, 5]
    missing: [2, 3]
@@ -688,7 +688,7 @@ mod std_hash_map {
         assert_eq!(
             failures,
             &[format!(
-                r#"assertion failed: expected foo_map to contain the values ["one", "two", "three"]
+                r#"expected foo_map to contain the values ["one", "two", "three"]
    but was: {formatted_actual}
   expected: ["one", "two", "three"]
    missing: ["two", "three"]
@@ -717,7 +717,7 @@ mod std_hash_map {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to contain exactly the keys [4, 5, 6, 3]
+                r"expected foo_map to contain exactly the keys [4, 5, 6, 3]
    but was: {formatted_actual}
   expected: [4, 5, 6, 3]
    missing: [3]
@@ -816,7 +816,7 @@ mod btree_map {
 
         assert_eq!(
             failures,
-            &[r#"assertion failed: expected foo_map to contain the key 7
+            &[r#"expected foo_map to contain the key 7
    but was: {1: "one", 4: "four", 5: "five"}
   expected: 7
 "#]
@@ -841,12 +841,10 @@ mod btree_map {
 
         assert_eq!(
             failures,
-            &[
-                r#"assertion failed: expected foo_map to not contain the key 1
+            &[r#"expected foo_map to not contain the key 1
    but was: {1: "one", 4: "four", 5: "five"}
   expected: not 1
-"#
-            ]
+"#]
         );
     }
 
@@ -882,12 +880,10 @@ mod btree_map {
 
         assert_eq!(
             failures,
-            &[
-                r#"assertion failed: expected foo_map to contain the value "six"
+            &[r#"expected foo_map to contain the value "six"
    but was: {1: "one", 4: "four", 5: "five"}
   expected: "six"
-"#
-            ]
+"#]
         );
     }
 
@@ -909,12 +905,10 @@ mod btree_map {
 
         assert_eq!(
             failures,
-            &[
-                r#"assertion failed: expected foo_map to not contain the value "one"
+            &[r#"expected foo_map to not contain the value "one"
    but was: {1: "one", 4: "four", 5: "five"}
   expected: not "one"
-"#
-            ]
+"#]
         );
     }
 
@@ -938,7 +932,7 @@ mod btree_map {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to contain the keys [5, 3, 7]
+                r"expected foo_map to contain the keys [5, 3, 7]
    but was: {formatted_actual}
   expected: [5, 3, 7]
    missing: [3, 7]
@@ -960,7 +954,7 @@ mod btree_map {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to contain the keys [5, 3, 7]
+                r"expected foo_map to contain the keys [5, 3, 7]
    but was: {formatted_actual}
   expected: [5, 3, 7]
    missing: [3, 7]
@@ -982,7 +976,7 @@ mod btree_map {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to contain the keys [5, 3, 7]
+                r"expected foo_map to contain the keys [5, 3, 7]
    but was: {formatted_actual}
   expected: [5, 3, 7]
    missing: [3, 7]
@@ -1011,7 +1005,7 @@ mod btree_map {
         assert_eq!(
             failures,
             &[format!(
-                r#"assertion failed: expected foo_map to contain the values ["one", "two", "three"]
+                r#"expected foo_map to contain the values ["one", "two", "three"]
    but was: {formatted_actual}
   expected: ["one", "two", "three"]
    missing: ["two", "three"]
@@ -1047,7 +1041,7 @@ mod btree_map {
         assert_eq!(
             failures,
             &[format!(
-                r"assertion failed: expected foo_map to contain exactly the keys [5, 2, 6, 3]
+                r"expected foo_map to contain exactly the keys [5, 2, 6, 3]
    but was: {formatted_actual}
   expected: [5, 2, 6, 3]
    missing: [2, 3]
@@ -1083,7 +1077,7 @@ mod colored {
         assert_eq!(
             failures,
             &[format!(
-                "assertion failed: expected foo_map to contain the key 2\n   \
+                "expected foo_map to contain the key 2\n   \
                 but was: {formatted_actual}\n  \
                expected: \u{1b}[32m2\u{1b}[0m\n\
             "
@@ -1106,7 +1100,7 @@ mod colored {
         assert_eq!(
             failures,
             &[format!(
-                "assertion failed: expected foo_map to not contain the key 1\n   \
+                "expected foo_map to not contain the key 1\n   \
                 but was: {formatted_actual}\n  \
                expected: not \u{1b}[32m1\u{1b}[0m\n\
             "
@@ -1132,7 +1126,7 @@ mod colored {
         assert_eq!(
             failures,
             &[format!(
-                "assertion failed: expected foo_map to contain the value \"three\"\n   \
+                "expected foo_map to contain the value \"three\"\n   \
                 but was: {formatted_actual}\n  \
                expected: \u{1b}[32m\"three\"\u{1b}[0m\n\
             "
@@ -1155,7 +1149,7 @@ mod colored {
         assert_eq!(
             failures,
             &[format!(
-                "assertion failed: expected foo_map to not contain the value \"four\"\n   \
+                "expected foo_map to not contain the value \"four\"\n   \
                 but was: {formatted_actual}\n  \
                expected: not \u{1b}[32m\"four\"\u{1b}[0m\n\
             "
@@ -1179,7 +1173,7 @@ mod colored {
         assert_eq!(
             failures,
             &[format!(
-                "assertion failed: expected foo_map to contain the keys [5, 2, 4, 7]\n   \
+                "expected foo_map to contain the keys [5, 2, 4, 7]\n   \
                 but was: {formatted_actual}\n  \
                expected: [5, \u{1b}[32m2\u{1b}[0m, 4, \u{1b}[32m7\u{1b}[0m]\n   \
                 missing: [2, 7]\n\
@@ -1211,7 +1205,7 @@ mod colored {
         assert_eq!(
             failures,
             &[format!(
-                "assertion failed: expected foo_map to not contain the keys [5, 2, 4, 7]\n   \
+                "expected foo_map to not contain the keys [5, 2, 4, 7]\n   \
                 but was: {formatted_actual}\n  \
                expected: [\u{1b}[32m5\u{1b}[0m, 2, \u{1b}[32m4\u{1b}[0m, 7]\n     \
                   extra: {formatted_extra}\n\
@@ -1236,7 +1230,7 @@ mod colored {
         assert_eq!(
             failures,
             &[format!(
-                "assertion failed: expected foo_map to contain the values [\"five\", \"two\", \"four\", \"seven\"]\n   \
+                "expected foo_map to contain the values [\"five\", \"two\", \"four\", \"seven\"]\n   \
                     but was: {formatted_actual}\n  \
                    expected: [\"five\", \u{1b}[32m\"two\"\u{1b}[0m, \"four\", \u{1b}[32m\"seven\"\u{1b}[0m]\n   \
                     missing: [\"two\", \"seven\"]\n\
@@ -1268,7 +1262,7 @@ mod colored {
         assert_eq!(
             failures,
             &[format!(
-                "assertion failed: expected foo_map to not contain the values [\"five\", \"two\", \"four\", \"seven\"]\n   \
+                "expected foo_map to not contain the values [\"five\", \"two\", \"four\", \"seven\"]\n   \
                     but was: {formatted_actual}\n  \
                    expected: [\u{1b}[32m\"five\"\u{1b}[0m, \"two\", \u{1b}[32m\"four\"\u{1b}[0m, \"seven\"]\n     \
                       extra: {formatted_extra}\n\
@@ -1300,7 +1294,7 @@ mod colored {
         assert_eq!(
             failures,
             &[format!(
-                "assertion failed: expected foo_map to contain exactly the keys [5, 2, 6, 3]\n   \
+                "expected foo_map to contain exactly the keys [5, 2, 6, 3]\n   \
                     but was: {formatted_actual}\n  \
                    expected: [5, \u{1b}[32m2\u{1b}[0m, 6, \u{1b}[32m3\u{1b}[0m]\n   \
                     missing: [2, 3]\n     \
diff --git a/src/num_bigint/tests.rs b/src/num_bigint/tests.rs
index 90a1801..ff21f63 100644
--- a/src/num_bigint/tests.rs
+++ b/src/num_bigint/tests.rs
@@ -18,7 +18,7 @@ fn verify_bigint_is_equal_to_other_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected subject to be equal to -42
+        &[r"expected subject to be equal to -42
    but was: 42
   expected: -42
 "]
@@ -156,7 +156,7 @@ fn verify_biguint_is_equal_to_other_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected subject to be equal to 22
+        &[r"expected subject to be equal to 22
    but was: 42
   expected: 22
 "]
diff --git a/src/option/mod.rs b/src/option/mod.rs
index 7b151ad..95302a7 100644
--- a/src/option/mod.rs
+++ b/src/option/mod.rs
@@ -46,7 +46,7 @@ where
     fn some(self) -> Spec<'a, T, R> {
         self.mapping(|subject| match subject {
             None => {
-                panic!("assertion failed: expected the subject to be `Some(_)`, but was `None`")
+                panic!("expected the subject to be `Some(_)`, but was `None`")
             },
             Some(value) => value,
         })
@@ -60,7 +60,7 @@ where
     fn some(self) -> Spec<'a, &'a T, R> {
         self.mapping(|subject| match subject {
             None => {
-                panic!("assertion failed: expected the subject to be `Some(_)`, but was `None`")
+                panic!("expected the subject to be `Some(_)`, but was `None`")
             },
             Some(value) => value,
         })
diff --git a/src/option/tests.rs b/src/option/tests.rs
index ef810dc..aa2507a 100644
--- a/src/option/tests.rs
+++ b/src/option/tests.rs
@@ -56,7 +56,7 @@ fn verify_option_of_custom_struct_is_none_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be None
+        &[r"expected my_thing to be None
    but was: Some(Foo)
   expected: None
 "]
@@ -87,7 +87,7 @@ fn verify_option_of_custom_struct_is_some_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be Some(_)
+        &[r"expected my_thing to be Some(_)
    but was: None
   expected: Some(_)
 "]
@@ -118,7 +118,7 @@ fn verify_borrowed_option_of_custom_struct_is_none_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be None
+        &[r"expected my_thing to be None
    but was: Some(Foo)
   expected: None
 "]
@@ -149,7 +149,7 @@ fn verify_borrowed_option_of_custom_struct_is_some_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be Some(_)
+        &[r"expected my_thing to be Some(_)
    but was: None
   expected: Some(_)
 "]
@@ -195,7 +195,7 @@ fn verify_option_of_string_has_some_value_fails() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to be some containing "labore dolores voluptate culpa"
+            r#"expected my_thing to be some containing "labore dolores voluptate culpa"
    but was: Some("labore dolore voluptate culpa")
   expected: Some("labore dolores voluptate culpa")
 "#
@@ -241,12 +241,10 @@ fn verify_option_of_custom_struct_has_value_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be some containing Foo
+        &[r"expected my_thing to be some containing Foo
    but was: None
   expected: Some(Foo)
-"
-        ]
+"]
     );
 }
 
@@ -274,12 +272,10 @@ fn verify_borrowed_option_of_custom_struct_has_value_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be some containing Foo
+        &[r"expected my_thing to be some containing Foo
    but was: None
   expected: Some(Foo)
-"
-        ]
+"]
     );
 }
 
@@ -308,7 +304,7 @@ fn map_option_with_none_to_its_value() {
     assert_that_code(|| {
         assert_that(subject).some().is_empty();
     })
-    .panics_with_message("assertion failed: expected the subject to be `Some(_)`, but was `None`");
+    .panics_with_message("expected the subject to be `Some(_)`, but was `None`");
 }
 
 #[test]
@@ -326,7 +322,7 @@ fn map_borrowed_option_with_none_to_its_value() {
     assert_that_code(|| {
         assert_that(&subject).some().is_empty();
     })
-    .panics_with_message("assertion failed: expected the subject to be `Some(_)`, but was `None`");
+    .panics_with_message("expected the subject to be `Some(_)`, but was `None`");
 }
 
 #[cfg(feature = "colored")]
@@ -345,7 +341,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to be Some(_)\n   \
+            &["expected subject to be Some(_)\n   \
                 but was: \u{1b}[31mNone\u{1b}[0m\n  \
                expected: \u{1b}[33mSome(_)\u{1b}[0m\n\
         "]
@@ -363,7 +359,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to be None\n   \
+            &["expected subject to be None\n   \
                 but was: \u{1b}[31mSome(3500)\u{1b}[0m\n  \
                expected: \u{1b}[33mNone\u{1b}[0m\n\
         "]
@@ -382,7 +378,7 @@ mod colored {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected subject to be some containing [1, 2, 3, 5, 7]\n   \
+                "expected subject to be some containing [1, 2, 3, 5, 7]\n   \
                 but was: \u{1b}[31mNone\u{1b}[0m\n  \
                expected: \u{1b}[33mSome([1, 2, 3, 5, 7])\u{1b}[0m\n\
         "
diff --git a/src/order/tests.rs b/src/order/tests.rs
index 7247e0b..2583e1c 100644
--- a/src/order/tests.rs
+++ b/src/order/tests.rs
@@ -22,7 +22,7 @@ fn verify_i32_is_less_than_other_i32_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be less than 42
+        &[r"expected my_thing to be less than 42
    but was: 42
   expected: < 42
 "]
@@ -47,7 +47,7 @@ fn verify_i32_is_greater_than_other_i32_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be greater than 42
+        &[r"expected my_thing to be greater than 42
    but was: 42
   expected: > 42
 "]
@@ -72,7 +72,7 @@ fn verify_i32_is_at_most_other_i32_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be at most 41
+        &[r"expected my_thing to be at most 41
    but was: 42
   expected: <= 41
 "]
@@ -97,7 +97,7 @@ fn verify_i32_is_at_least_other_i32_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be at least 43
+        &[r"expected my_thing to be at least 43
    but was: 42
   expected: >= 43
 "]
@@ -126,7 +126,7 @@ fn verify_char_is_less_than_other_char_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be less than 'C'
+        &[r"expected my_thing to be less than 'C'
    but was: 'C'
   expected: < 'C'
 "]
@@ -151,7 +151,7 @@ fn verify_char_is_greater_than_other_char_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be greater than 'D'
+        &[r"expected my_thing to be greater than 'D'
    but was: 'D'
   expected: > 'D'
 "]
@@ -176,7 +176,7 @@ fn verify_char_is_at_most_other_char_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be at most 'B'
+        &[r"expected my_thing to be at most 'B'
    but was: 'C'
   expected: <= 'B'
 "]
@@ -201,7 +201,7 @@ fn verify_char_is_at_least_other_char_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be at least 'E'
+        &[r"expected my_thing to be at least 'E'
    but was: 'D'
   expected: >= 'E'
 "]
@@ -226,7 +226,7 @@ fn verify_char_is_before_other_char_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be before 'L'
+        &[r"expected my_thing to be before 'L'
    but was: 'L'
   expected: < 'L'
 "]
@@ -251,7 +251,7 @@ fn verify_char_is_after_other_char_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be after 'L'
+        &[r"expected my_thing to be after 'L'
    but was: 'L'
   expected: > 'L'
 "]
@@ -278,12 +278,10 @@ fn verify_char_is_between_a_min_char_and_a_max_char_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be between 'M' and 'P'
+        &[r"expected my_thing to be between 'M' and 'P'
    but was: 'L'
   expected: 'M' <= x <= 'P'
-"
-        ]
+"]
     );
 }
 
@@ -302,12 +300,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to be less than 3.779\n   \
+            &["expected subject to be less than 3.779\n   \
                   but was: \u{1b}[31m3.781\u{1b}[0m\n  \
                  expected: < \u{1b}[32m3.779\u{1b}[0m\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -322,12 +318,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to be at most 3.779\n   \
+            &["expected subject to be at most 3.779\n   \
                   but was: \u{1b}[31m3.781\u{1b}[0m\n  \
                  expected: <= \u{1b}[34m3.779\u{1b}[0m\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -342,12 +336,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to be greater than 3.782\n   \
+            &["expected subject to be greater than 3.782\n   \
                   but was: \u{1b}[31m3.781\u{1b}[0m\n  \
                  expected: > \u{1b}[33m3.782\u{1b}[0m\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -362,12 +354,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to be at least 3.782\n   \
+            &["expected subject to be at least 3.782\n   \
                   but was: \u{1b}[31m3.781\u{1b}[0m\n  \
                  expected: >= \u{1b}[34m3.782\u{1b}[0m\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -382,12 +372,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to be between 'M' and 'P'\n   \
+            &["expected subject to be between 'M' and 'P'\n   \
                     but was: \u{1b}[31m'L'\u{1b}[0m\n  \
                    expected: \u{1b}[33m'M'\u{1b}[0m <= x <= 'P'\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -402,12 +390,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to be between 'H' and 'K'\n   \
+            &["expected subject to be between 'H' and 'K'\n   \
                     but was: \u{1b}[31m'L'\u{1b}[0m\n  \
                    expected: 'H' <= x <= \u{1b}[33m'K'\u{1b}[0m\n\
-                "
-            ]
+                "]
         );
     }
 }
diff --git a/src/panic/tests.rs b/src/panic/tests.rs
index fb9d033..53f54d8 100644
--- a/src/panic/tests.rs
+++ b/src/panic/tests.rs
@@ -21,11 +21,9 @@ fn verify_code_does_not_panic_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_closure to not panic, but did panic
+        &[r#"expected my_closure to not panic, but did panic
   with message: "excepteur stet sadipscing eu"
-"#
-        ]
+"#]
     );
 }
 
@@ -52,9 +50,7 @@ fn code_does_panic_with_message_from_assertion() {
             .with_diff_format(DIFF_FORMAT_NO_HIGHLIGHT)
             .is_equal_to(4);
     })
-    .panics_with_message(
-        "assertion failed: expected subject to be equal to 4\n   but was: 5\n  expected: 4\n",
-    );
+    .panics_with_message("expected subject to be equal to 4\n   but was: 5\n  expected: 4\n");
 }
 
 #[test]
@@ -76,10 +72,8 @@ fn verify_code_does_panic_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_closure to panic, but did not panic
-"
-        ]
+        &[r"expected my_closure to panic, but did not panic
+"]
     );
 }
 
@@ -95,7 +89,7 @@ fn verify_code_does_panic_with_message_fails_because_code_does_not_panic() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_closure to panic with message "nam veniam ut et",
+            r#"expected my_closure to panic with message "nam veniam ut et",
   but did not panic
 "#
         ]
@@ -116,8 +110,8 @@ fn verify_code_does_panic_with_message_fails_because_unexpected_panic_message()
     assert_eq!(
         failures,
         &[
-            "assertion failed: expected my_closure to panic with message \"lobortis lorem aliquam ex\"\n   \
-   but was: \"assertion failed: expected subject to be equal to 4\n   but was: 5\n  expected: 4\n\"\n  \
+            "expected my_closure to panic with message \"lobortis lorem aliquam ex\"\n   \
+   but was: \"expected subject to be equal to 4\n   but was: 5\n  expected: 4\n\"\n  \
   expected: \"lobortis lorem aliquam ex\"\n\
 "
         ]
@@ -145,7 +139,7 @@ mod colored {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected foo to not panic, but \u{1b}[31mdid panic\u{1b}[0m\n  \
+                "expected foo to not panic, but \u{1b}[31mdid panic\u{1b}[0m\n  \
                    with message: \"\u{1b}[31mfoo does not work with message\u{1b}[0m\"\n\
                 "
             ]
@@ -162,7 +156,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected foo to panic, but \u{1b}[31mdid not panic\u{1b}[0m\n"]
+            &["expected foo to panic, but \u{1b}[31mdid not panic\u{1b}[0m\n"]
         );
     }
 
@@ -176,8 +170,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected foo to panic with message \"hendrerit sint tempor ipsum\",\n  \
-                 but \u{1b}[31mdid not panic\u{1b}[0m\n"]
+            &[
+                "expected foo to panic with message \"hendrerit sint tempor ipsum\",\n  \
+                 but \u{1b}[31mdid not panic\u{1b}[0m\n"
+            ]
         );
     }
 
@@ -191,7 +187,8 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected foo to panic with message \"hendrerit sint tempor ipsum\"\n   \
+            &[
+                "expected foo to panic with message \"hendrerit sint tempor ipsum\"\n   \
                   but was: \"\u{1b}[31mfoo does not work with message\u{1b}[0m\"\n  \
                  expected: \"\u{1b}[32mhendrerit sint tempor ipsum\u{1b}[0m\"\n\
               "
diff --git a/src/predicate/tests.rs b/src/predicate/tests.rs
index 99d5e46..6ee8c15 100644
--- a/src/predicate/tests.rs
+++ b/src/predicate/tests.rs
@@ -20,7 +20,7 @@ fn verify_that_subject_satisfies_predicate_fails() {
 
     assert_eq!(
         failures,
-        &["assertion failed: expected my_thing to satisfy the given predicate, but returned false\n"]
+        &["expected my_thing to satisfy the given predicate, but returned false\n"]
     );
 }
 
@@ -35,8 +35,5 @@ fn verify_that_subject_satisfies_predicate_fails_with_custom_message() {
         })
         .display_failures();
 
-    assert_eq!(
-        failures,
-        &["assertion failed: the answer to all important questions is 42\n"]
-    );
+    assert_eq!(failures, &["the answer to all important questions is 42\n"]);
 }
diff --git a/src/range/tests.rs b/src/range/tests.rs
index bc5a72d..b16bf9a 100644
--- a/src/range/tests.rs
+++ b/src/range/tests.rs
@@ -22,12 +22,10 @@ fn verify_i32_is_in_range_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be within range of 43..51
+        &[r"expected my_thing to be within range of 43..51
    but was: 42
   expected: 43 <= x < 51
-"
-        ]
+"]
     );
 }
 
@@ -49,12 +47,10 @@ fn verify_i32_is_in_inclusive_range_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be within range of 43..=51
+        &[r"expected my_thing to be within range of 43..=51
    but was: 42
   expected: 43 <= x <= 51
-"
-        ]
+"]
     );
 }
 
@@ -76,12 +72,10 @@ fn verify_i32_is_in_range_from_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be within range of 43..
+        &[r"expected my_thing to be within range of 43..
    but was: 42
   expected: 43 <= x < ..
-"
-        ]
+"]
     );
 }
 
@@ -103,12 +97,10 @@ fn verify_i32_is_in_range_to_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be within range of ..42
+        &[r"expected my_thing to be within range of ..42
    but was: 42
   expected: .. < x < 42
-"
-        ]
+"]
     );
 }
 
@@ -130,12 +122,10 @@ fn verify_i32_is_in_range_to_inclusive_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be within range of ..=41
+        &[r"expected my_thing to be within range of ..=41
    but was: 42
   expected: .. < x <= 41
-"
-        ]
+"]
     );
 }
 
@@ -157,12 +147,10 @@ fn verify_i32_is_not_in_range_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be not within range of 41..43
+        &[r"expected my_thing to be not within range of 41..43
    but was: 42
   expected: x < 41 || x >= 43
-"
-        ]
+"]
     );
 }
 
@@ -184,12 +172,10 @@ fn verify_i32_is_not_in_inclusive_range_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be not within range of 41..=42
+        &[r"expected my_thing to be not within range of 41..=42
    but was: 42
   expected: x < 41 || x > 42
-"
-        ]
+"]
     );
 }
 
@@ -211,12 +197,10 @@ fn verify_i32_is_not_in_range_from_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be not within range of 42..
+        &[r"expected my_thing to be not within range of 42..
    but was: 42
   expected: x < 42 || x > ..
-"
-        ]
+"]
     );
 }
 
@@ -238,12 +222,10 @@ fn verify_i32_is_not_in_range_to_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be not within range of ..43
+        &[r"expected my_thing to be not within range of ..43
    but was: 42
   expected: x < .. || x >= 43
-"
-        ]
+"]
     );
 }
 
@@ -265,12 +247,10 @@ fn verify_i32_is_not_in_range_to_inclusive_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be not within range of ..=42
+        &[r"expected my_thing to be not within range of ..=42
    but was: 42
   expected: x < .. || x > 42
-"
-        ]
+"]
     );
 }
 
@@ -296,12 +276,10 @@ fn verify_char_is_in_range_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be within range of 'L'..'Z'
+        &[r"expected my_thing to be within range of 'L'..'Z'
    but was: 'K'
   expected: 'L' <= x < 'Z'
-"
-        ]
+"]
     );
 }
 
@@ -323,12 +301,10 @@ fn verify_char_is_in_inclusive_range_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be within range of 'L'..='Z'
+        &[r"expected my_thing to be within range of 'L'..='Z'
    but was: 'K'
   expected: 'L' <= x <= 'Z'
-"
-        ]
+"]
     );
 }
 
@@ -350,12 +326,10 @@ fn verify_char_is_not_in_range_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be not within range of 'J'..'L'
+        &[r"expected my_thing to be not within range of 'J'..'L'
    but was: 'K'
   expected: x < 'J' || x >= 'L'
-"
-        ]
+"]
     );
 }
 
@@ -377,12 +351,10 @@ fn verify_char_is_not_in_inclusive_range_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be not within range of 'J'..='K'
+        &[r"expected my_thing to be not within range of 'J'..='K'
    but was: 'K'
   expected: x < 'J' || x > 'K'
-"
-        ]
+"]
     );
 }
 
@@ -434,12 +406,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to be within range of -4321..4322\n   \
+            &["expected subject to be within range of -4321..4322\n   \
                      but was: \u{1b}[31m29834\u{1b}[0m\n  \
                     expected: -4321 <= x < \u{1b}[34m4322\u{1b}[0m\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -454,12 +424,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to be within range of -4321..4322\n   \
+            &["expected subject to be within range of -4321..4322\n   \
                      but was: \u{1b}[31m-29834\u{1b}[0m\n  \
                     expected: \u{1b}[34m-4321\u{1b}[0m <= x < 4322\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -474,12 +442,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to be within range of -4321..=4321\n   \
+            &["expected subject to be within range of -4321..=4321\n   \
                      but was: \u{1b}[31m29834\u{1b}[0m\n  \
                     expected: -4321 <= x <= \u{1b}[34m4321\u{1b}[0m\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -494,12 +460,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to be within range of -4321..=4321\n   \
+            &["expected subject to be within range of -4321..=4321\n   \
                      but was: \u{1b}[31m-29834\u{1b}[0m\n  \
                     expected: \u{1b}[34m-4321\u{1b}[0m <= x <= 4321\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -514,12 +478,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to be not within range of 'a'..'p'\n   \
+            &["expected subject to be not within range of 'a'..'p'\n   \
                      but was: \u{1b}[31m'm'\u{1b}[0m\n  \
                     expected: x < \u{1b}[32m'a'\u{1b}[0m || x >= \u{1b}[32m'p'\u{1b}[0m\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -534,12 +496,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to be not within range of 'a'..='z'\n   \
+            &["expected subject to be not within range of 'a'..='z'\n   \
                      but was: \u{1b}[31m'm'\u{1b}[0m\n  \
                     expected: x < \u{1b}[32m'a'\u{1b}[0m || x > \u{1b}[32m'z'\u{1b}[0m\n\
-                "
-            ]
+                "]
         );
     }
 }
diff --git a/src/result/mod.rs b/src/result/mod.rs
index 8b91293..7e1c61a 100644
--- a/src/result/mod.rs
+++ b/src/result/mod.rs
@@ -56,7 +56,7 @@ where
         self.mapping(|subject| match subject {
             Ok(value) => value,
             Err(error) => {
-                panic!("assertion failed: expected the subject to be `Ok(_)`, but was `Err({error:?})`")
+                panic!("expected the subject to be `Ok(_)`, but was `Err({error:?})`")
             },
         })
     }
@@ -64,7 +64,7 @@ where
     fn err(self) -> Spec<'a, E, R> {
         self.mapping(|subject| match subject {
             Ok(value) => {
-                panic!("assertion failed: expected the subject to be `Err(_)`, but was `Ok({value:?})`")
+                panic!("expected the subject to be `Err(_)`, but was `Ok({value:?})`")
             },
             Err(error) => error,
         })
@@ -80,7 +80,7 @@ where
         self.mapping(|subject| match subject {
             Ok(value) => value,
             Err(error) => {
-                panic!("assertion failed: expected the subject to be `Ok(_)`, but was `Err({error:?})`")
+                panic!("expected the subject to be `Ok(_)`, but was `Err({error:?})`")
             },
         })
     }
@@ -88,7 +88,7 @@ where
     fn err(self) -> Spec<'a, &'a E, R> {
         self.mapping(|subject| match subject {
             Ok(value) => {
-                panic!("assertion failed: expected the subject to be `Err(_)`, but was `Ok({value:?})`")
+                panic!("expected the subject to be `Err(_)`, but was `Ok({value:?})`")
             },
             Err(error) => error,
         })
@@ -154,7 +154,7 @@ where
     fn has_error_message(self, expected: X) -> Spec<'a, String, R> {
         self.mapping(|result| match result {
             Ok(value) => panic!(
-                r"assertion failed: expected the subject to be `Err(_)` with message {expected:?}, but was `Ok({value:?})`"
+                r"expected the subject to be `Err(_)` with message {expected:?}, but was `Ok({value:?})`"
             ),
             Err(error) => {
                 error.to_string()
@@ -174,7 +174,7 @@ where
     fn has_error_message(self, expected: X) -> Spec<'a, String, R> {
         self.mapping(|result| match result {
             Ok(value) => panic!(
-                r"assertion failed: expected the subject to be `Err(_)` with message {expected:?}, but was `Ok({value:?})`"
+                r"expected the subject to be `Err(_)` with message {expected:?}, but was `Ok({value:?})`"
             ),
             Err(error) => {
                 error.to_string()
diff --git a/src/result/tests.rs b/src/result/tests.rs
index af67edf..b0656cc 100644
--- a/src/result/tests.rs
+++ b/src/result/tests.rs
@@ -58,7 +58,7 @@ fn verify_result_of_custom_types_is_ok_fails() {
 
     assert_eq!(
         failures,
-        &[r#"assertion failed: expected my_thing to be Ok(_)
+        &[r#"expected my_thing to be Ok(_)
    but was: Err(MyError("aute nam ad amet"))
   expected: Ok(_)
 "#]
@@ -83,7 +83,7 @@ fn verify_result_of_custom_types_is_err_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be Err(_)
+        &[r"expected my_thing to be Err(_)
    but was: Ok(MyValue(42))
   expected: Err(_)
 "]
@@ -135,7 +135,7 @@ fn verify_result_of_custom_types_has_value_fails() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to be ok containing MyValue("sea non obcaecat nostrud")
+            r#"expected my_thing to be ok containing MyValue("sea non obcaecat nostrud")
    but was: Err(MyError("amet esse rebum feugait"))
   expected: Ok(MyValue("sea non obcaecat nostrud"))
 "#
@@ -161,12 +161,10 @@ fn verify_result_of_custom_types_has_error_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be an error containing MyError(-1)
+        &[r"expected my_thing to be an error containing MyError(-1)
    but was: Ok(MyValue(42))
   expected: Err(MyError(-1))
-"
-        ]
+"]
     );
 }
 
@@ -214,7 +212,7 @@ fn verify_borrowed_result_of_custom_types_is_ok_fails() {
 
     assert_eq!(
         failures,
-        &[r#"assertion failed: expected my_thing to be Ok(_)
+        &[r#"expected my_thing to be Ok(_)
    but was: Err(MyError("aute nam ad amet"))
   expected: Ok(_)
 "#]
@@ -239,7 +237,7 @@ fn verify_borrowed_result_of_custom_types_is_err_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to be Err(_)
+        &[r"expected my_thing to be Err(_)
    but was: Ok(MyValue(42))
   expected: Err(_)
 "]
@@ -291,7 +289,7 @@ fn verify_borrowed_result_of_custom_types_has_value_fails() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to be ok containing MyValue("sea non obcaecat nostrud")
+            r#"expected my_thing to be ok containing MyValue("sea non obcaecat nostrud")
    but was: Err(MyError("amet esse rebum feugait"))
   expected: Ok(MyValue("sea non obcaecat nostrud"))
 "#
@@ -317,12 +315,10 @@ fn verify_borrowed_result_of_custom_types_has_error_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be an error containing MyError(-1)
+        &[r"expected my_thing to be an error containing MyError(-1)
    but was: Ok(MyValue(42))
   expected: Err(MyError(-1))
-"
-        ]
+"]
     );
 }
 
@@ -341,7 +337,9 @@ fn map_result_with_err_value_to_its_ok_value() {
     assert_that_code(|| {
         assert_that(subject).ok().is_not_empty();
     })
-        .panics_with_message("assertion failed: expected the subject to be `Ok(_)`, but was `Err(\"nam nihil iure liber\")`");
+    .panics_with_message(
+        "expected the subject to be `Ok(_)`, but was `Err(\"nam nihil iure liber\")`",
+    );
 }
 
 #[test]
@@ -359,9 +357,7 @@ fn map_result_with_ok_value_to_its_err_value() {
     assert_that_code(|| {
         assert_that(subject).err().is_not_empty();
     })
-    .panics_with_message(
-        "assertion failed: expected the subject to be `Err(_)`, but was `Ok([1, 2, 3])`",
-    );
+    .panics_with_message("expected the subject to be `Err(_)`, but was `Ok([1, 2, 3])`");
 }
 
 #[test]
@@ -379,7 +375,9 @@ fn map_borrowed_result_with_err_value_to_its_ok_value() {
     assert_that_code(|| {
         assert_that(&subject).ok().is_not_empty();
     })
-        .panics_with_message("assertion failed: expected the subject to be `Ok(_)`, but was `Err(\"nam nihil iure liber\")`");
+    .panics_with_message(
+        "expected the subject to be `Ok(_)`, but was `Err(\"nam nihil iure liber\")`",
+    );
 }
 
 #[test]
@@ -397,9 +395,7 @@ fn map_borrowed_result_with_ok_value_to_its_err_value() {
     assert_that_code(|| {
         assert_that(&subject).err().is_not_empty();
     })
-    .panics_with_message(
-        "assertion failed: expected the subject to be `Err(_)`, but was `Ok([1, 2, 3])`",
-    );
+    .panics_with_message("expected the subject to be `Err(_)`, but was `Ok([1, 2, 3])`");
 }
 
 #[test]
@@ -434,7 +430,7 @@ fn verify_result_error_has_message_for_ok_value() {
     assert_that_code(|| {
         assert_that(subject).has_error_message("vulputate voluptate sanctus quod");
     }).panics_with_message(
-        r#"assertion failed: expected the subject to be `Err(_)` with message "vulputate voluptate sanctus quod", but was `Ok(())`"#,
+        r#"expected the subject to be `Err(_)` with message "vulputate voluptate sanctus quod", but was `Ok(())`"#,
     );
 }
 
@@ -470,7 +466,7 @@ fn verify_borrowed_result_error_has_message_for_ok_value() {
     assert_that_code(|| {
         assert_that(&subject).has_error_message("vulputate voluptate sanctus quod");
     }).panics_with_message(
-        r#"assertion failed: expected the subject to be `Err(_)` with message "vulputate voluptate sanctus quod", but was `Ok(())`"#,
+        r#"expected the subject to be `Err(_)` with message "vulputate voluptate sanctus quod", but was `Ok(())`"#,
     );
 }
 
@@ -494,7 +490,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to be Ok(_)\n   \
+            &["expected subject to be Ok(_)\n   \
                 but was: \u{1b}[31mErr(\"esse augue id esse\")\u{1b}[0m\n  \
                expected: \u{1b}[34mOk(_)\u{1b}[0m\n\
             "]
@@ -512,7 +508,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to be Err(_)\n   \
+            &["expected subject to be Err(_)\n   \
                 but was: \u{1b}[31mOk(3500)\u{1b}[0m\n  \
                expected: \u{1b}[32mErr(_)\u{1b}[0m\n\
             "]
@@ -530,12 +526,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to be ok containing [1, 2, 3, 5, 7]\n   \
+            &["expected subject to be ok containing [1, 2, 3, 5, 7]\n   \
                 but was: \u{1b}[31mErr(\"minim facer liber kasd\")\u{1b}[0m\n  \
                expected: \u{1b}[33mOk([1, 2, 3, 5, 7])\u{1b}[0m\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -551,7 +545,7 @@ mod colored {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected subject to be an error containing \"at feugait nihil qui\"\n   \
+                "expected subject to be an error containing \"at feugait nihil qui\"\n   \
                 but was: \u{1b}[31mOk([1, 2, 3, 5, 7])\u{1b}[0m\n  \
                expected: \u{1b}[33mErr(\"at feugait nihil qui\")\u{1b}[0m\n\
             "
diff --git a/src/rust_decimal/tests.rs b/src/rust_decimal/tests.rs
index dca5cc1..5d6154e 100644
--- a/src/rust_decimal/tests.rs
+++ b/src/rust_decimal/tests.rs
@@ -22,7 +22,7 @@ fn verify_decimal_is_equal_to_other_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected subject to be equal to -42.831
+        &[r"expected subject to be equal to -42.831
    but was: 42.831
   expected: -42.831
 "]
@@ -168,12 +168,10 @@ fn verify_decimal_has_precision_of_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected subject to have a precision of 7
+        &[r"expected subject to have a precision of 7
    but was: 29
   expected: 7
-"
-        ]
+"]
     );
 }
 
@@ -210,7 +208,7 @@ fn verify_decimal_has_scale_of_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected subject to have a scale of 5
+        &[r"expected subject to have a scale of 5
    but was: 2
   expected: 5
 "]
@@ -239,7 +237,7 @@ fn verify_decimal_is_integer_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected subject to be an integer value
+        &[r"expected subject to be an integer value
    but was: 4208.10
   expected: an integer value
 "]
diff --git a/src/slice/tests.rs b/src/slice/tests.rs
index c3089be..9a9c950 100644
--- a/src/slice/tests.rs
+++ b/src/slice/tests.rs
@@ -31,12 +31,10 @@ fn verify_slice_is_equal_to_another_slice_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be equal to [2, 4, 6, 8]
+        &[r"expected my_thing to be equal to [2, 4, 6, 8]
    but was: [1, 3, 5, 7]
   expected: [2, 4, 6, 8]
-"
-        ]
+"]
     );
 }
 
@@ -93,12 +91,10 @@ fn verify_slice_has_length_less_than_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have a length less than 6
+        &[r"expected my_thing to have a length less than 6
    but was: 6
   expected: < 6
-"
-        ]
+"]
     );
 }
 
@@ -120,12 +116,10 @@ fn verify_slice_has_length_greater_than_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have a length greater than 6
+        &[r"expected my_thing to have a length greater than 6
    but was: 6
   expected: > 6
-"
-        ]
+"]
     );
 }
 
@@ -148,12 +142,10 @@ fn verify_slice_has_at_most_length_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have at most a length of 5
+        &[r"expected my_thing to have at most a length of 5
    but was: 6
   expected: <= 5
-"
-        ]
+"]
     );
 }
 
@@ -176,12 +168,10 @@ fn verify_slice_has_at_least_length_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have at least a length of 7
+        &[r"expected my_thing to have at least a length of 7
    but was: 6
   expected: >= 7
-"
-        ]
+"]
     );
 }
 
@@ -206,7 +196,7 @@ fn verify_slice_contains_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to contain 21
+        &[r"expected my_thing to contain 21
    but was: [1, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43]
   expected: 21
 "]
@@ -234,7 +224,7 @@ fn verify_slice_iterator_contains_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to contain 21
+        &[r"expected my_thing to contain 21
    but was: [1, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43]
   expected: 21
 "]
@@ -262,7 +252,7 @@ fn verify_slice_does_not_contain_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to not contain 19
+        &[r"expected my_thing to not contain 19
    but was: [1, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43]
   expected: not 19
 "]
@@ -290,7 +280,7 @@ fn verify_slice_iterator_does_not_contain_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to not contain 19
+        &[r"expected my_thing to not contain 19
    but was: [1, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43]
   expected: not 19
 "]
@@ -318,7 +308,7 @@ fn verify_slice_contains_exactly_in_any_order_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected my_thing to contain exactly in any order [0, 1, 3, 5, 7, 11, 11, 13, 17, 19, 23, 29, 31, 37, 41]
+            r"expected my_thing to contain exactly in any order [0, 1, 3, 5, 7, 11, 11, 13, 17, 19, 23, 29, 31, 37, 41]
    but was: [5, 7, 11, 13, 1, 11, 3, 17, 23, 23, 29, 31, 41, 37, 43]
   expected: [0, 1, 3, 5, 7, 11, 11, 13, 17, 19, 23, 29, 31, 37, 41]
    missing: [0, 19]
@@ -347,7 +337,7 @@ fn verify_slice_contains_any_of_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected my_thing to contain any of [0, 2, 4, 8, 16, 32, 64]
+            r"expected my_thing to contain any of [0, 2, 4, 8, 16, 32, 64]
    but was: [5, 7, 11, 13, 1, 11, 3, 17, 23, 23, 29, 31, 41, 37, 43]
   expected: [0, 2, 4, 8, 16, 32, 64]
 "
@@ -374,7 +364,7 @@ fn verify_slice_does_not_contain_any_of_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected my_thing to not contain any of [0, 2, 4, 41, 16, 32, 64]
+            r"expected my_thing to not contain any of [0, 2, 4, 41, 16, 32, 64]
    but was: [5, 7, 11, 13, 1, 11, 3, 17, 23, 23, 29, 31, 41, 37, 43]
   expected: not [0, 2, 4, 41, 16, 32, 64]
 "
@@ -401,7 +391,7 @@ fn verify_slice_contains_all_of_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected my_thing to contain all of [5, 18, 3, 17, 45, 1, 1, 29, 0]
+            r"expected my_thing to contain all of [5, 18, 3, 17, 45, 1, 1, 29, 0]
    but was: [5, 7, 11, 13, 1, 11, 3, 17, 23, 23, 29, 31, 41, 37, 43]
   expected: [5, 18, 3, 17, 45, 1, 1, 29, 0]
    missing: [18, 45, 0]
@@ -428,13 +418,11 @@ fn verify_slice_contains_only_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to contain only [1, 3, 7, 11, 19]
+        &[r"expected my_thing to contain only [1, 3, 7, 11, 19]
    but was: [5, 11, 1, 3, 19, 17, 11, 43]
   expected: [1, 3, 7, 11, 19]
      extra: [5, 17, 43]
-"
-        ]
+"]
     );
 }
 
@@ -456,14 +444,12 @@ fn verify_slice_contains_only_once_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to contain only once [1, 3, 7, 11, 19]
+        &[r"expected my_thing to contain only once [1, 3, 7, 11, 19]
      but was: [5, 11, 1, 3, 3, 19, 17, 11, 3, 43]
     expected: [1, 3, 7, 11, 19]
        extra: [5, 17, 43]
   duplicates: [11, 3, 3, 11, 3]
-"
-        ]
+"]
     );
 }
 
@@ -514,7 +500,7 @@ fn verify_slice_contains_exactly_fails_out_of_order() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to contain exactly in order ["two", "two", "one", "three", "four", "five", "six", "seven", "four", "eight", "nine"]
+            r#"expected my_thing to contain exactly in order ["two", "two", "one", "three", "four", "five", "six", "seven", "four", "eight", "nine"]
        but was: ["one", "two", "two", "three", "four", "five", "six", "four", "seven", "eight", "nine"]
       expected: ["two", "two", "one", "three", "four", "five", "six", "seven", "four", "eight", "nine"]
        missing: []
@@ -554,7 +540,7 @@ fn verify_slice_contains_exactly_fails_missing_and_extra() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to contain exactly in order ["one", "two", "two", "three", "four", "five", "six", "six", "seven", "four", "eight", "nine"]
+            r#"expected my_thing to contain exactly in order ["one", "two", "two", "three", "four", "five", "six", "six", "seven", "four", "eight", "nine"]
        but was: ["one", "two", "six", "three", "four", "five", "six", "six", "seven", "eleven", "eight", "nine", "ten"]
       expected: ["one", "two", "two", "three", "four", "five", "six", "six", "seven", "four", "eight", "nine"]
        missing: ["two", "four"]
@@ -592,7 +578,7 @@ fn verify_slice_contains_exactly_fails_expected_longer_than_vec() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to contain exactly in order ["one", "two", "two", "three", "four", "five", "six", "four", "seven", "eight", "nine", "ten"]
+            r#"expected my_thing to contain exactly in order ["one", "two", "two", "three", "four", "five", "six", "four", "seven", "eight", "nine", "ten"]
        but was: ["one", "two", "two", "three", "four", "five", "six", "four", "seven", "eight", "nine"]
       expected: ["one", "two", "two", "three", "four", "five", "six", "four", "seven", "eight", "nine", "ten"]
        missing: ["ten"]
@@ -655,7 +641,7 @@ fn verify_slice_contains_sequence_fails() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to contain the sequence ["two", "three", "four", "five", "six", "six", "four"]
+            r#"expected my_thing to contain the sequence ["two", "three", "four", "five", "six", "six", "four"]
    but was: ["one", "two", "two", "three", "four", "five", "six", "four", "two", "seven", "two", "three", "five", "four", "six", "four", "eight", "nine", "ten"]
   expected: ["two", "three", "four", "five", "six", "six", "four"]
    missing: ["six", "four"]
@@ -684,7 +670,7 @@ fn verify_slice_contains_sequence_fails_expected_longer_than_vec() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to contain the sequence ["one", "two", "three", "four", "five", "six", "seven"]
+            r#"expected my_thing to contain the sequence ["one", "two", "three", "four", "five", "six", "seven"]
    but was: ["one", "two", "three", "four", "five", "six"]
   expected: ["one", "two", "three", "four", "five", "six", "seven"]
    missing: ["seven"]
@@ -749,7 +735,7 @@ fn verify_slice_contains_all_in_order_fails() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to contain all of ["one", "two", "two", "seven", "two", "three", "six", "six", "ten"] in order
+            r#"expected my_thing to contain all of ["one", "two", "two", "seven", "two", "three", "six", "six", "ten"] in order
    but was: ["one", "two", "two", "three", "four", "five", "six", "four", "two", "seven", "two", "three", "five", "four", "six", "four", "eight", "nine", "ten"]
   expected: ["one", "two", "two", "seven", "two", "three", "six", "six", "ten"]
    missing: ["six"]
@@ -797,14 +783,12 @@ fn verify_vec_starts_with_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to start with [13, 5, 7, 1, 19]
+        &[r"expected my_thing to start with [13, 5, 7, 1, 19]
    but was: [13, 5, 7, 19, 1, 3, 11, 29, 23, 31, 37]
   expected: [13, 5, 7, 1, 19]
    missing: [1, 19]
      extra: [19, 1]
-"
-        ]
+"]
     );
 }
 
@@ -820,7 +804,7 @@ fn verify_empty_vec_starts_with_expected_sequence_longer_than_vec_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected my_thing to start with [13, 5, 7, 19, 1, 3, 11, 29, 23, 31, 37]
+            r"expected my_thing to start with [13, 5, 7, 19, 1, 3, 11, 29, 23, 31, 37]
    but was: [13, 5, 7, 19, 1, 3, 11, 29, 23, 31]
   expected: [13, 5, 7, 19, 1, 3, 11, 29, 23, 31, 37]
    missing: [37]
@@ -869,14 +853,12 @@ fn verify_vec_ends_with_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to end with [11, 23, 23, 31, 73]
+        &[r"expected my_thing to end with [11, 23, 23, 31, 73]
    but was: [13, 5, 7, 19, 1, 3, 11, 29, 23, 31, 37]
   expected: [11, 23, 23, 31, 73]
    missing: [23, 73]
      extra: [29, 37]
-"
-        ]
+"]
     );
 }
 
@@ -892,7 +874,7 @@ fn verify_empty_vec_ends_with_expected_sequence_longer_than_vec_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected my_thing to end with [41, 13, 5, 7, 19, 1, 3, 11, 29, 23, 31]
+            r"expected my_thing to end with [41, 13, 5, 7, 19, 1, 3, 11, 29, 23, 31]
    but was: [13, 5, 7, 19, 1, 3, 11, 29, 23, 31]
   expected: [41, 13, 5, 7, 19, 1, 3, 11, 29, 23, 31]
    missing: [41]
@@ -917,7 +899,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to contain 21\n   \
+            &["expected subject to contain 21\n   \
                 but was: [\u{1b}[31m13\u{1b}[0m, \u{1b}[31m5\u{1b}[0m, \u{1b}[31m7\u{1b}[0m, \u{1b}[31m19\u{1b}[0m, \u{1b}[31m1\u{1b}[0m, \u{1b}[31m3\u{1b}[0m, \u{1b}[31m11\u{1b}[0m, \u{1b}[31m29\u{1b}[0m, \u{1b}[31m23\u{1b}[0m, \u{1b}[31m31\u{1b}[0m, \u{1b}[31m37\u{1b}[0m]\n  \
                expected: \u{1b}[32m21\u{1b}[0m\n\
             "]
@@ -935,7 +917,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to not contain 19\n   \
+            &["expected subject to not contain 19\n   \
                 but was: [13, 5, 7, \u{1b}[31m19\u{1b}[0m, 1, 3, 11, 29, \u{1b}[31m19\u{1b}[0m, \u{1b}[31m19\u{1b}[0m, 37]\n  \
                expected: not \u{1b}[32m19\u{1b}[0m\n\
             "]
@@ -952,7 +934,7 @@ mod colored {
             .display_failures();
 
         assert_eq!(failures, &[
-            "assertion failed: expected subject to contain exactly in any order [1, 2, 3, 13, 8, 7, 12, 15, 31, 19, 20, 11, 31]\n   \
+            "expected subject to contain exactly in any order [1, 2, 3, 13, 8, 7, 12, 15, 31, 19, 20, 11, 31]\n   \
                 but was: [13, \u{1b}[31m5\u{1b}[0m, 7, 19, 1, 3, 11, \u{1b}[31m29\u{1b}[0m, \u{1b}[31m23\u{1b}[0m, 31, \u{1b}[31m37\u{1b}[0m]\n  \
                expected: [1, \u{1b}[34m2\u{1b}[0m, 3, 13, \u{1b}[34m8\u{1b}[0m, 7, \u{1b}[34m12\u{1b}[0m, \u{1b}[34m15\u{1b}[0m, 31, 19, \u{1b}[34m20\u{1b}[0m, 11, \u{1b}[34m31\u{1b}[0m]\n   \
                 missing: [2, 8, 12, 15, 20, 31]\n     \
@@ -971,7 +953,7 @@ mod colored {
             .display_failures();
 
         assert_eq!(failures, &[
-            "assertion failed: expected subject to contain any of [2, 4, 6, 8, 9, 10, 12, 15, 32, 20, 18]\n   \
+            "expected subject to contain any of [2, 4, 6, 8, 9, 10, 12, 15, 32, 20, 18]\n   \
                 but was: [\u{1b}[31m13\u{1b}[0m, \u{1b}[31m5\u{1b}[0m, \u{1b}[31m7\u{1b}[0m, \u{1b}[31m19\u{1b}[0m, \u{1b}[31m1\u{1b}[0m, \u{1b}[31m3\u{1b}[0m, \u{1b}[31m11\u{1b}[0m, \u{1b}[31m29\u{1b}[0m, \u{1b}[31m23\u{1b}[0m, \u{1b}[31m31\u{1b}[0m, \u{1b}[31m37\u{1b}[0m]\n  \
                expected: [\u{1b}[34m2\u{1b}[0m, \u{1b}[34m4\u{1b}[0m, \u{1b}[34m6\u{1b}[0m, \u{1b}[34m8\u{1b}[0m, \u{1b}[34m9\u{1b}[0m, \u{1b}[34m10\u{1b}[0m, \u{1b}[34m12\u{1b}[0m, \u{1b}[34m15\u{1b}[0m, \u{1b}[34m32\u{1b}[0m, \u{1b}[34m20\u{1b}[0m, \u{1b}[34m18\u{1b}[0m]\n\
             "
@@ -988,7 +970,7 @@ mod colored {
             .display_failures();
 
         assert_eq!(failures, &[
-            "assertion failed: expected subject to not contain any of [2, 4, 6, 8, 9, 10, 11, 15, 32, 20, 18]\n   \
+            "expected subject to not contain any of [2, 4, 6, 8, 9, 10, 11, 15, 32, 20, 18]\n   \
                 but was: [13, 5, 7, 19, \u{1b}[31m11\u{1b}[0m, \u{1b}[31m11\u{1b}[0m, 3, \u{1b}[31m11\u{1b}[0m, 29, 23, 31, 37]\n  \
                expected: not [2, 4, 6, 8, 9, 10, \u{1b}[34m11\u{1b}[0m, 15, 32, 20, 18]\n\
             "
@@ -1005,7 +987,7 @@ mod colored {
             .display_failures();
 
         assert_eq!(failures, &[
-            "assertion failed: expected subject to contain all of [2, 3, 5, 20, 11, 13, 19, 37, 22]\n   \
+            "expected subject to contain all of [2, 3, 5, 20, 11, 13, 19, 37, 22]\n   \
                 but was: [13, 5, \u{1b}[31m7\u{1b}[0m, 19, \u{1b}[31m1\u{1b}[0m, 3, 11, \u{1b}[31m29\u{1b}[0m, \u{1b}[31m23\u{1b}[0m, \u{1b}[31m31\u{1b}[0m, 37]\n  \
                expected: [\u{1b}[34m2\u{1b}[0m, 3, 5, \u{1b}[34m20\u{1b}[0m, 11, 13, 19, 37, \u{1b}[34m22\u{1b}[0m]\n   \
                 missing: [2, 20, 22]\n\
@@ -1023,7 +1005,7 @@ mod colored {
             .display_failures();
 
         assert_eq!(failures, &[
-            "assertion failed: expected subject to contain only [13, 3, 5, 20, 11, 13, 19, 37, 22]\n   \
+            "expected subject to contain only [13, 3, 5, 20, 11, 13, 19, 37, 22]\n   \
                 but was: [13, 5, \u{1b}[31m7\u{1b}[0m, 19, \u{1b}[31m1\u{1b}[0m, 3, 11, \u{1b}[31m29\u{1b}[0m, \u{1b}[31m23\u{1b}[0m, \u{1b}[31m31\u{1b}[0m, 37]\n  \
                expected: [13, 3, 5, \u{1b}[34m20\u{1b}[0m, 11, 13, 19, 37, \u{1b}[34m22\u{1b}[0m]\n     \
                   extra: [7, 1, 29, 23, 31]\n\
@@ -1043,7 +1025,7 @@ mod colored {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected subject to contain only once [1, 3, 7, 11, 19]\n     \
+                "expected subject to contain only once [1, 3, 7, 11, 19]\n     \
                     but was: [\u{1b}[31m5\u{1b}[0m, \u{1b}[31m11\u{1b}[0m, 1, \u{1b}[31m3\u{1b}[0m, \u{1b}[31m3\u{1b}[0m, 19, \u{1b}[31m17\u{1b}[0m, \u{1b}[31m11\u{1b}[0m, \u{1b}[31m3\u{1b}[0m, \u{1b}[31m43\u{1b}[0m]\n    \
                    expected: [1, \u{1b}[34m3\u{1b}[0m, \u{1b}[34m7\u{1b}[0m, \u{1b}[34m11\u{1b}[0m, 19]\n       \
                       extra: [5, 17, 43]\n  \
@@ -1063,7 +1045,7 @@ mod colored {
             .display_failures();
 
         assert_eq!(failures, &[
-            "assertion failed: expected subject to contain exactly in order [13, 20, 5, 19, 11, 29, 8, 1, 23, 31, 41]\n       \
+            "expected subject to contain exactly in order [13, 20, 5, 19, 11, 29, 8, 1, 23, 31, 41]\n       \
                     but was: [13, \u{1b}[31m5\u{1b}[0m, \u{1b}[31m7\u{1b}[0m, 19, \u{1b}[31m1\u{1b}[0m, \u{1b}[31m3\u{1b}[0m, \u{1b}[31m11\u{1b}[0m, \u{1b}[31m29\u{1b}[0m, 23, 31, \u{1b}[31m37\u{1b}[0m]\n      \
                    expected: [13, \u{1b}[33m20\u{1b}[0m, \u{1b}[33m5\u{1b}[0m, 19, \u{1b}[33m11\u{1b}[0m, \u{1b}[33m29\u{1b}[0m, \u{1b}[33m8\u{1b}[0m, \u{1b}[33m1\u{1b}[0m, 23, 31, \u{1b}[33m41\u{1b}[0m]\n       \
                     missing: [20, 8, 41]\n         \
@@ -1085,7 +1067,7 @@ mod colored {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected subject to contain the sequence [19, 3, 7, 11, 29]\n   \
+                "expected subject to contain the sequence [19, 3, 7, 11, 29]\n   \
                     but was: [13, 5, 7, 19, \u{1b}[31m1\u{1b}[0m, \u{1b}[31m3\u{1b}[0m, 11, 29, 23, 31, 37]\n  \
                    expected: [19, \u{1b}[33m3\u{1b}[0m, \u{1b}[33m7\u{1b}[0m, 11, 29]\n   \
                     missing: [3, 7]\n     \
@@ -1107,7 +1089,7 @@ mod colored {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected subject to contain all of [13, 3, 7, 22, 11, 20, 29, 37] in order\n   \
+                "expected subject to contain all of [13, 3, 7, 22, 11, 20, 29, 37] in order\n   \
                     but was: [13, 5, 7, 19, 1, 3, 11, 29, 23, 31, 37]\n  \
                    expected: [13, 3, \u{1b}[33m7\u{1b}[0m, \u{1b}[33m22\u{1b}[0m, 11, \u{1b}[33m20\u{1b}[0m, 29, 37]\n   \
                     missing: [7, 22, 20]\n\
@@ -1128,7 +1110,7 @@ mod colored {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected subject to start with [13, 5, 8, 19, 4]\n   \
+                "expected subject to start with [13, 5, 8, 19, 4]\n   \
                 but was: [13, 5, \u{1b}[31m7\u{1b}[0m, 19, \u{1b}[31m1\u{1b}[0m, 3, 11, 29, 23, 31, 37]\n  \
                expected: [13, 5, \u{1b}[33m8\u{1b}[0m, 19, \u{1b}[33m4\u{1b}[0m]\n   \
                 missing: [8, 4]\n     \
@@ -1150,7 +1132,7 @@ mod colored {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected subject to end with [3, 11, 28, 29, 30, 37]\n   \
+                "expected subject to end with [3, 11, 28, 29, 30, 37]\n   \
                 but was: [13, 5, 7, 19, 1, 3, 11, \u{1b}[31m29\u{1b}[0m, \u{1b}[31m23\u{1b}[0m, \u{1b}[31m31\u{1b}[0m, 37]\n  \
                expected: [3, 11, \u{1b}[33m28\u{1b}[0m, \u{1b}[33m29\u{1b}[0m, \u{1b}[33m30\u{1b}[0m, 37]\n   \
                 missing: [28, 29, 30]\n     \
diff --git a/src/spec/mod.rs b/src/spec/mod.rs
index 8a74593..0f7f0a1 100644
--- a/src/spec/mod.rs
+++ b/src/spec/mod.rs
@@ -173,7 +173,7 @@ macro_rules! assert_that_code {
 ///     .display_failures();
 ///
 /// assert_that!(failures).contains_exactly([
-///     r#"assertion failed: expected || { divide(7, 0); } to not panic, but did panic
+///     r#"expected || { divide(7, 0); } to not panic, but did panic
 ///   with message: "attempt to divide by zero"
 /// "#
 /// ]);
@@ -183,7 +183,7 @@ macro_rules! assert_that_code {
 ///     .display_failures();
 ///
 /// assert_that!(failures).contains_exactly([
-///     r#"assertion failed: expected || { divide(7, 0); } to panic with message "division by zero"
+///     r#"expected || { divide(7, 0); } to panic with message "division by zero"
 ///    but was: "attempt to divide by zero"
 ///   expected: "division by zero"
 /// "#
@@ -296,11 +296,11 @@ pub fn assert_that<'a, S>(subject: S) -> Spec<'a, S, PanicOnFail> {
 ///     .display_failures();
 ///
 /// assert_that!(failures).contains_exactly([
-///     r#"assertion failed: expected my_thing to start with "nibh"
+///     r#"expected my_thing to start with "nibh"
 ///    but was: "vel tempor augue delenit"
 ///   expected: "nibh"
 /// "#,
-///     r#"assertion failed: expected my_thing to end with "magna"
+///     r#"expected my_thing to end with "magna"
 ///    but was: "vel tempor augue delenit"
 ///   expected: "magna"
 /// "#,
@@ -393,7 +393,7 @@ where
 ///     .display_failures();
 ///
 /// assert_that!(failures).contains_exactly([
-///     r#"assertion failed: expected the closure to not panic, but did panic
+///     r#"expected the closure to not panic, but did panic
 ///   with message: "attempt to divide by zero"
 /// "#
 /// ]);
@@ -403,7 +403,7 @@ where
 ///     .display_failures();
 ///
 /// assert_that!(failures).contains_exactly([
-///     r#"assertion failed: expected the closure to panic with message "division by zero"
+///     r#"expected the closure to panic with message "division by zero"
 ///    but was: "attempt to divide by zero"
 ///   expected: "division by zero"
 /// "#
@@ -910,7 +910,7 @@ where
     /// let failures = verify_that!(22).satisfies(is_odd).display_failures();
     ///
     /// assert_that!(failures).contains_exactly([
-    ///     "assertion failed: expected 22 to satisfy the given predicate, but returned false\n"
+    ///     "expected 22 to satisfy the given predicate, but returned false\n"
     /// ]);
     /// ```
     ///
@@ -952,7 +952,7 @@ where
     ///         .display_failures();
     ///
     /// assert_that!(failures).contains_exactly([
-    ///     "assertion failed: expected my number to be odd\n"
+    ///     "expected my number to be odd\n"
     /// ]);
     /// ```
     ///
@@ -1016,11 +1016,11 @@ impl<S> Spec<'_, S, CollectFailures> {
     /// assertions in the panic message:
     ///
     /// ```console
-    /// assertion failed: expected subject to contain "unimportant"
+    /// expected subject to contain "unimportant"
     ///    but was: "the answer to all important questions is 42"
     ///   expected: "unimportant"
     ///
-    /// assertion failed: expected subject to have at most a length of 41
+    /// expected subject to have at most a length of 41
     ///    but was: 43
     ///   expected: <= 41
     /// ```
@@ -1079,15 +1079,15 @@ impl<'a, I, R> Spec<'a, I, R> {
     /// will print:
     ///
     /// ```console
-    /// assertion failed: expected numbers 1. item to be greater than 2
+    /// expected numbers 1. item to be greater than 2
     ///    but was: 2
     ///   expected: > 2
     ///
-    /// assertion failed: expected numbers 4. item to be at most 7
+    /// expected numbers 4. item to be at most 7
     ///    but was: 8
     ///   expected: <= 7
     ///
-    /// assertion failed: expected numbers 5. item to be at most 7
+    /// expected numbers 5. item to be at most 7
     ///    but was: 10
     ///   expected: <= 7
     /// ```
@@ -1145,10 +1145,10 @@ impl Display for AssertFailure {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match &self.description {
             None => {
-                writeln!(f, "assertion failed: {}", &self.message)?;
+                writeln!(f, "{}", &self.message)?;
             },
             Some(description) => {
-                writeln!(f, "assertion failed: {description}\n{}", &self.message)?;
+                writeln!(f, "{description}\n{}", &self.message)?;
             },
         }
         Ok(())
diff --git a/src/spec/tests.rs b/src/spec/tests.rs
index 3abbbe1..4270f67 100644
--- a/src/spec/tests.rs
+++ b/src/spec/tests.rs
@@ -57,8 +57,9 @@ fn assert_failure_display_format() {
         location: Some(OwnedLocation::new("src/thing_module/thing_test.rs", 54, 13)),
     };
 
-    assert_that!(format!("{}", failure))
-        .is_equal_to("assertion failed: this thing is the best\nbut this thing is the worst\ninstead it should be the best\n");
+    assert_that!(format!("{}", failure)).is_equal_to(
+        "this thing is the best\nbut this thing is the worst\ninstead it should be the best\n",
+    );
 }
 
 #[test]
@@ -120,7 +121,7 @@ fn assert_that_macro_with_borrowed_str_subject() {
 
 #[test]
 #[should_panic(
-    expected = "assertion failed: expected ultimate_answer to be equal to 42\n   but was: 51\n  expected: 42\n"
+    expected = "expected ultimate_answer to be equal to 42\n   but was: 51\n  expected: 42\n"
 )]
 fn assert_that_macro_is_equal_to_with_integers_fails() {
     let ultimate_answer = 51;
@@ -149,11 +150,11 @@ fn verify_that_option_is_some_chained_with_has_value_fails_as_none() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected my_variable to be Some(_)
+            r"expected my_variable to be Some(_)
    but was: None
   expected: Some(_)
 ",
-            r"assertion failed: expected my_variable to be some containing 42
+            r"expected my_variable to be some containing 42
    but was: None
   expected: Some(42)
 ",
@@ -172,13 +173,11 @@ fn verify_that_a_subject_with_custom_description_is_equal_to_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: the answer to all important questions is 42
+        &[r"the answer to all important questions is 42
 expected subject to be equal to 42
    but was: 51
   expected: 42
-"
-        ]
+"]
     );
 }
 
@@ -194,13 +193,11 @@ fn verify_that_a_subject_with_custom_name_and_custom_description_is_equal_to_fai
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: the answer to all important questions is 42
+        &[r"the answer to all important questions is 42
 expected answer to be equal to 42
    but was: 51
   expected: 42
-"
-        ]
+"]
     );
 }
 
@@ -215,11 +212,11 @@ fn soft_assertions_with_chained_assertion_methods() {
 }
 
 #[test]
-#[should_panic = "assertion failed: expected subject to contain \"unimportant\"\n   \
+#[should_panic = "expected subject to contain \"unimportant\"\n   \
        but was: \"the answer to all important questions is 42\"\n  \
       expected: \"unimportant\"\n\
     \n\
-    assertion failed: expected subject to have at most a length of 41\n   \
+    expected subject to have at most a length of 41\n   \
        but was: 43\n  \
       expected: <= 41\n\
 "]
@@ -251,7 +248,7 @@ fn assert_each_item_of_a_borrowed_iterator() {
 }
 
 #[test]
-#[should_panic = "assertion failed: expected numbers 2. item to be not equal to 4\n   but was: 4\n  expected: not 4\n"]
+#[should_panic = "expected numbers 2. item to be not equal to 4\n   but was: 4\n  expected: not 4\n"]
 fn assert_each_item_of_an_iterator_panics_if_one_assertion_fails() {
     let subject = [2, 4, 6, 8, 10];
 
@@ -273,15 +270,15 @@ fn verify_assert_each_item_of_an_iterator_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected numbers 1. item to be greater than 2
+            r"expected numbers 1. item to be greater than 2
    but was: 2
   expected: > 2
 ",
-            r"assertion failed: expected numbers 4. item to be at most 7
+            r"expected numbers 4. item to be at most 7
    but was: 8
   expected: <= 7
 ",
-            r"assertion failed: expected numbers 5. item to be at most 7
+            r"expected numbers 5. item to be at most 7
    but was: 10
   expected: <= 7
 ",
@@ -294,11 +291,11 @@ mod colored {
     use crate::prelude::*;
 
     #[test]
-    #[should_panic = "assertion failed: expected subject to contain \"unimportant\"\n   \
+    #[should_panic = "expected subject to contain \"unimportant\"\n   \
        but was: \"\u{1b}[31mthe answer to all important questions is 42\u{1b}[0m\"\n  \
       expected: \"\u{1b}[32munimportant\u{1b}[0m\"\n\
     \n\
-    assertion failed: expected subject to have at most a length of 41\n   \
+    expected subject to have at most a length of 41\n   \
        but was: \u{1b}[31m43\u{1b}[0m\n  \
       expected: <= \u{1b}[32m41\u{1b}[0m\n\
 "]
diff --git a/src/string/tests.rs b/src/string/tests.rs
index d173450..e69e602 100644
--- a/src/string/tests.rs
+++ b/src/string/tests.rs
@@ -83,7 +83,7 @@ fn verify_string_is_equal_to_str_fails() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to be equal to "aute duis eleifend molestie"
+            r#"expected my_thing to be equal to "aute duis eleifend molestie"
    but was: ""
   expected: "aute duis eleifend molestie"
 "#
@@ -144,7 +144,7 @@ fn verify_str_is_empty_fails() {
 
     assert_eq!(
         failures,
-        &[r#"assertion failed: expected my_thing to be empty
+        &[r#"expected my_thing to be empty
    but was: "ABC"
   expected: <empty>
 "#]
@@ -162,7 +162,7 @@ fn verify_string_is_not_empty_fails() {
 
     assert_eq!(
         failures,
-        &[r#"assertion failed: expected my_thing to be not empty
+        &[r#"expected my_thing to be not empty
    but was: ""
   expected: <non-empty>
 "#]
@@ -201,7 +201,7 @@ fn verify_str_has_length_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to have a length of 29
+        &[r"expected my_thing to have a length of 29
    but was: 28
   expected: 29
 "]
@@ -226,12 +226,10 @@ fn verify_has_length_in_range_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have a length within range 1..25
+        &[r"expected my_thing to have a length within range 1..25
    but was: 25
   expected: 1..25
-"
-        ]
+"]
     );
 }
 
@@ -253,12 +251,10 @@ fn verify_has_length_in_inclusive_range_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have a length within range 1..=24
+        &[r"expected my_thing to have a length within range 1..=24
    but was: 25
   expected: 1..=24
-"
-        ]
+"]
     );
 }
 
@@ -280,12 +276,10 @@ fn verify_string_has_length_less_than_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have a length less than 25
+        &[r"expected my_thing to have a length less than 25
    but was: 25
   expected: < 25
-"
-        ]
+"]
     );
 }
 
@@ -307,12 +301,10 @@ fn verify_string_has_length_greater_than_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have a length greater than 28
+        &[r"expected my_thing to have a length greater than 28
    but was: 28
   expected: > 28
-"
-        ]
+"]
     );
 }
 
@@ -335,12 +327,10 @@ fn verify_string_has_at_most_length_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have at most a length of 29
+        &[r"expected my_thing to have at most a length of 29
    but was: 30
   expected: <= 29
-"
-        ]
+"]
     );
 }
 
@@ -363,12 +353,10 @@ fn verify_string_has_at_least_length_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have at least a length of 22
+        &[r"expected my_thing to have at least a length of 22
    but was: 21
   expected: >= 22
-"
-        ]
+"]
     );
 }
 
@@ -415,12 +403,10 @@ fn verify_str_has_char_count_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have a char count of 7
+        &[r"expected my_thing to have a char count of 7
    but was: 5
   expected: 7
-"
-        ]
+"]
     );
 }
 
@@ -463,12 +449,10 @@ fn verify_str_has_char_count_in_range_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have a char count within 6..12
+        &[r"expected my_thing to have a char count within 6..12
    but was: 5
   expected: 6..12
-"
-        ]
+"]
     );
 }
 
@@ -490,12 +474,10 @@ fn verify_str_has_char_count_in_inclusive_range_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have a char count within 6..=12
+        &[r"expected my_thing to have a char count within 6..=12
    but was: 5
   expected: 6..=12
-"
-        ]
+"]
     );
 }
 
@@ -517,12 +499,10 @@ fn verify_string_has_char_count_less_than_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have a char count less than 7
+        &[r"expected my_thing to have a char count less than 7
    but was: 7
   expected: < 7
-"
-        ]
+"]
     );
 }
 
@@ -544,12 +524,10 @@ fn verify_string_has_char_count_greater_than_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have a char count greater than 7
+        &[r"expected my_thing to have a char count greater than 7
    but was: 7
   expected: > 7
-"
-        ]
+"]
     );
 }
 
@@ -572,12 +550,10 @@ fn verify_string_has_at_most_char_count_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have at most a char count of 6
+        &[r"expected my_thing to have at most a char count of 6
    but was: 7
   expected: <= 6
-"
-        ]
+"]
     );
 }
 
@@ -600,12 +576,10 @@ fn verify_string_has_at_least_char_count_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to have at least a char count of 8
+        &[r"expected my_thing to have at least a char count of 8
    but was: 7
   expected: >= 8
-"
-        ]
+"]
     );
 }
 
@@ -655,12 +629,10 @@ fn verify_string_contains_other_str_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to contain "not a substring"
+        &[r#"expected my_thing to contain "not a substring"
    but was: "invidunt eos hendrerit commodo"
   expected: "not a substring"
-"#
-        ]
+"#]
     );
 }
 
@@ -675,12 +647,10 @@ fn verify_string_contains_other_string_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to contain "not a substring"
+        &[r#"expected my_thing to contain "not a substring"
    but was: "invidunt eos hendrerit commodo"
   expected: "not a substring"
-"#
-        ]
+"#]
     );
 }
 
@@ -695,7 +665,7 @@ fn verify_string_contains_char_fails() {
 
     assert_eq!(
         failures,
-        &[r#"assertion failed: expected my_thing to contain 'Q'
+        &[r#"expected my_thing to contain 'Q'
    but was: "consectetur ex hendrerit officia"
   expected: 'Q'
 "#]
@@ -734,12 +704,10 @@ fn verify_str_contains_any_char_of_a_slice_of_chars_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to contain any of ['x', 'y', 'z']
+        &[r#"expected my_thing to contain any of ['x', 'y', 'z']
    but was: "luptatum in nihil laoreet"
   expected: ['x', 'y', 'z']
-"#
-        ]
+"#]
     );
 }
 
@@ -754,12 +722,10 @@ fn verify_string_contains_any_char_of_an_array_of_chars_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to contain any of ['x', 'y', 'z']
+        &[r#"expected my_thing to contain any of ['x', 'y', 'z']
    but was: "luptatum in nihil laoreet"
   expected: ['x', 'y', 'z']
-"#
-        ]
+"#]
     );
 }
 
@@ -774,12 +740,10 @@ fn verify_str_contains_any_char_of_a_borrowed_array_of_chars_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to contain any of ['x', 'y', 'z']
+        &[r#"expected my_thing to contain any of ['x', 'y', 'z']
    but was: "luptatum in nihil laoreet"
   expected: ['x', 'y', 'z']
-"#
-        ]
+"#]
     );
 }
 
@@ -829,12 +793,10 @@ fn verify_string_does_not_contain_other_str_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to not contain " eos "
+        &[r#"expected my_thing to not contain " eos "
    but was: "invidunt eos hendrerit commodo"
   expected: not " eos "
-"#
-        ]
+"#]
     );
 }
 
@@ -849,12 +811,10 @@ fn verify_string_does_not_contain_other_string_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to not contain "eos hend"
+        &[r#"expected my_thing to not contain "eos hend"
    but was: "invidunt eos hendrerit commodo"
   expected: not "eos hend"
-"#
-        ]
+"#]
     );
 }
 
@@ -869,7 +829,7 @@ fn verify_string_does_not_contain_char_fails() {
 
     assert_eq!(
         failures,
-        &[r#"assertion failed: expected my_thing to not contain 'x'
+        &[r#"expected my_thing to not contain 'x'
    but was: "consectetur ex hendrerit officia"
   expected: not 'x'
 "#]
@@ -908,12 +868,10 @@ fn verify_str_does_not_contain_any_char_of_a_slice_of_chars_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to not contain any of ['x', 'n', 'z']
+        &[r#"expected my_thing to not contain any of ['x', 'n', 'z']
    but was: "luptatum in nihil laoreet"
   expected: not ['x', 'n', 'z']
-"#
-        ]
+"#]
     );
 }
 
@@ -928,12 +886,10 @@ fn verify_string_does_not_contain_any_char_of_an_array_of_chars_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to not contain any of ['d', 'k', 'n']
+        &[r#"expected my_thing to not contain any of ['d', 'k', 'n']
    but was: "luptatum in nihil laoreet"
   expected: not ['d', 'k', 'n']
-"#
-        ]
+"#]
     );
 }
 
@@ -948,12 +904,10 @@ fn verify_str_does_not_contain_any_char_of_a_borrowed_array_of_chars_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to not contain any of ['u', 'a', 'l']
+        &[r#"expected my_thing to not contain any of ['u', 'a', 'l']
    but was: "luptatum in nihil laoreet"
   expected: not ['u', 'a', 'l']
-"#
-        ]
+"#]
     );
 }
 
@@ -1010,12 +964,10 @@ fn verify_string_starts_with_str_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to start with "false start"
+        &[r#"expected my_thing to start with "false start"
    but was: "possim deserunt obcaecat hendrerit"
   expected: "false start"
-"#
-        ]
+"#]
     );
 }
 
@@ -1030,12 +982,10 @@ fn verify_string_starts_with_string_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to start with "false start"
+        &[r#"expected my_thing to start with "false start"
    but was: "possim deserunt obcaecat hendrerit"
   expected: "false start"
-"#
-        ]
+"#]
     );
 }
 
@@ -1050,7 +1000,7 @@ fn verify_string_starts_with_char_fails() {
 
     assert_eq!(
         failures,
-        &[r#"assertion failed: expected my_thing to start with 'X'
+        &[r#"expected my_thing to start with 'X'
    but was: "possim deserunt obcaecat hendrerit"
   expected: 'X'
 "#]
@@ -1110,12 +1060,10 @@ fn verify_string_ends_with_str_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to end with "abrupt end"
+        &[r#"expected my_thing to end with "abrupt end"
    but was: "possim deserunt obcaecat hendrerit"
   expected: "abrupt end"
-"#
-        ]
+"#]
     );
 }
 
@@ -1130,12 +1078,10 @@ fn verify_string_ends_with_string_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to end with "abrupt end"
+        &[r#"expected my_thing to end with "abrupt end"
    but was: "possim deserunt obcaecat hendrerit"
   expected: "abrupt end"
-"#
-        ]
+"#]
     );
 }
 
@@ -1150,7 +1096,7 @@ fn verify_string_ends_with_char_fails() {
 
     assert_eq!(
         failures,
-        &[r#"assertion failed: expected my_thing to end with 'Z'
+        &[r#"expected my_thing to end with 'Z'
    but was: "possim deserunt obcaecat hendrerit"
   expected: 'Z'
 "#]
@@ -1210,12 +1156,10 @@ fn verify_string_does_not_start_with_str_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to not start with "possim des"
+        &[r#"expected my_thing to not start with "possim des"
    but was: "possim deserunt obcaecat hendrerit"
   expected: not "possim des"
-"#
-        ]
+"#]
     );
 }
 
@@ -1230,12 +1174,10 @@ fn verify_string_does_not_start_with_string_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to not start with "poss"
+        &[r#"expected my_thing to not start with "poss"
    but was: "possim deserunt obcaecat hendrerit"
   expected: not "poss"
-"#
-        ]
+"#]
     );
 }
 
@@ -1250,7 +1192,7 @@ fn verify_string_does_not_start_with_char_fails() {
 
     assert_eq!(
         failures,
-        &[r#"assertion failed: expected my_thing to not start with 'p'
+        &[r#"expected my_thing to not start with 'p'
    but was: "possim deserunt obcaecat hendrerit"
   expected: not 'p'
 "#]
@@ -1310,12 +1252,10 @@ fn verify_string_does_not_end_with_str_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to not end with "rerit"
+        &[r#"expected my_thing to not end with "rerit"
    but was: "possim deserunt obcaecat hendrerit"
   expected: not "rerit"
-"#
-        ]
+"#]
     );
 }
 
@@ -1330,12 +1270,10 @@ fn verify_string_does_not_end_with_string_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r#"assertion failed: expected my_thing to not end with "caecat hendrerit"
+        &[r#"expected my_thing to not end with "caecat hendrerit"
    but was: "possim deserunt obcaecat hendrerit"
   expected: not "caecat hendrerit"
-"#
-        ]
+"#]
     );
 }
 
@@ -1350,7 +1288,7 @@ fn verify_string_does_not_end_with_char_fails() {
 
     assert_eq!(
         failures,
-        &[r#"assertion failed: expected my_thing to not end with 't'
+        &[r#"expected my_thing to not end with 't'
    but was: "possim deserunt obcaecat hendrerit"
   expected: not 't'
 "#]
@@ -1379,12 +1317,10 @@ mod regex {
 
         assert_eq!(
             failures,
-            &[
-                r"assertion failed: expected my_thing to match the regex \b\w{12}\b
+            &[r"expected my_thing to match the regex \b\w{12}\b
                but was: volutpat lobortis aliquam diam
   does not match regex: \b\w{12}\b
-"
-            ]
+"]
         );
     }
 
@@ -1407,7 +1343,7 @@ mod regex {
         assert_eq!(
             failures,
             &[
-                r"assertion failed: expected my_thing to not match the regex ^[a-zA-Z0-9 ]{8,32}$
+                r"expected my_thing to not match the regex ^[a-zA-Z0-9 ]{8,32}$
                but was: volutpat lobortis aliquam diam
       does match regex: ^[a-zA-Z0-9 ]{8,32}$
 "
@@ -1455,7 +1391,7 @@ mod colored {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected subject to be equal to \"invi wisi exercitation anim placerat\"\n   \
+                "expected subject to be equal to \"invi wisi exercitation anim placerat\"\n   \
                     but was: \"invi\u{1b}[31mdunt\u{1b}[0m wisi \u{1b}[31mfacilisis \u{1b}[0mexercitation\"\n  \
                    expected: \"invi wisi exercitation\u{1b}[34m anim placerat\u{1b}[0m\"\n\
                 "
@@ -1472,10 +1408,12 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to be not equal to \"aute aliquip culpa blandit\"\n   \
+            &[
+                "expected subject to be not equal to \"aute aliquip culpa blandit\"\n   \
                but was: \"aute aliquip culpa blandit\"\n  \
               expected: not \"aute aliquip culpa blandit\"\n\
-            "]
+            "
+            ]
         );
     }
 
@@ -1490,7 +1428,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to be empty\n   \
+            &["expected subject to be empty\n   \
                but was: \u{1b}[31m\"voluptua quod quis dignissim\"\u{1b}[0m\n  \
               expected: <empty>\n\
             "]
@@ -1508,7 +1446,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to be not empty\n   \
+            &["expected subject to be not empty\n   \
                but was: \u{1b}[31m\"\"\u{1b}[0m\n  \
               expected: <non-empty>\n\
             "]
@@ -1526,12 +1464,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to have a length of 29\n   \
+            &["expected subject to have a length of 29\n   \
                but was: \u{1b}[31m23\u{1b}[0m\n  \
               expected: \u{1b}[32m29\u{1b}[0m\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -1546,12 +1482,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to have a length within range 8..=20\n   \
+            &["expected subject to have a length within range 8..=20\n   \
                    but was: \u{1b}[31m26\u{1b}[0m\n  \
                   expected: \u{1b}[32m8..=20\u{1b}[0m\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -1566,12 +1500,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to contain \"status\"\n   \
+            &["expected subject to contain \"status\"\n   \
                     but was: \"\u{1b}[31msanctus stet eiusmod odio\u{1b}[0m\"\n  \
                    expected: \"\u{1b}[33mstatus\u{1b}[0m\"\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -1586,12 +1518,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to contain \"status\"\n   \
+            &["expected subject to contain \"status\"\n   \
                     but was: \"\u{1b}[31msanctus stet eiusmod odio\u{1b}[0m\"\n  \
                    expected: \"\u{1b}[33mstatus\u{1b}[0m\"\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -1606,7 +1536,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to contain 'E'\n   \
+            &["expected subject to contain 'E'\n   \
                  but was: \"\u{1b}[31msanctus stet eiusmod odio\u{1b}[0m\"\n  \
                 expected: '\u{1b}[33mE\u{1b}[0m'\n\
             "]
@@ -1624,12 +1554,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to not contain \"stet eius\"\n   \
+            &["expected subject to not contain \"stet eius\"\n   \
                     but was: \"sanctus \u{1b}[31mstet eius\u{1b}[0mmod odio\"\n  \
                    expected: not \"\u{1b}[33mstet eius\u{1b}[0m\"\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -1644,12 +1572,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to not contain \"stet eius\"\n   \
+            &["expected subject to not contain \"stet eius\"\n   \
                     but was: \"sanctus \u{1b}[31mstet eius\u{1b}[0mmod odio\"\n  \
                    expected: not \"\u{1b}[33mstet eius\u{1b}[0m\"\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -1664,7 +1590,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to not contain 't'\n   \
+            &["expected subject to not contain 't'\n   \
                  but was: \"sanc\u{1b}[31mt\u{1b}[0mus s\u{1b}[31mt\u{1b}[0me\u{1b}[31mtt\u{1b}[0m eiusmod odio\"\n  \
                 expected: not '\u{1b}[33mt\u{1b}[0m'\n\
             "]
@@ -1682,12 +1608,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to start with \"una\"\n   \
+            &["expected subject to start with \"una\"\n   \
                    but was: \"\u{1b}[31mnul\u{1b}[0mla feugiat illum culpa\"\n  \
                   expected: \"\u{1b}[32muna\u{1b}[0m\"\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -1702,12 +1626,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to start with \"una\"\n   \
+            &["expected subject to start with \"una\"\n   \
                     but was: \"\u{1b}[31mnul\u{1b}[0mla feugiat illum culpa\"\n  \
                    expected: \"\u{1b}[32muna\u{1b}[0m\"\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -1722,12 +1644,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to not start with \"null\"\n   \
+            &["expected subject to not start with \"null\"\n   \
                    but was: \"\u{1b}[31mnull\u{1b}[0ma feugiat illum culpa\"\n  \
                   expected: not \"\u{1b}[32mnull\u{1b}[0m\"\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -1742,12 +1662,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to not start with \"null\"\n   \
+            &["expected subject to not start with \"null\"\n   \
                     but was: \"\u{1b}[31mnull\u{1b}[0ma feugiat illum culpa\"\n  \
                    expected: not \"\u{1b}[32mnull\u{1b}[0m\"\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -1762,7 +1680,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to start with 'o'\n   \
+            &["expected subject to start with 'o'\n   \
                    but was: \"\u{1b}[31mc\u{1b}[0mommodo sadipscing id imperdiet\"\n  \
                   expected: '\u{1b}[32mo\u{1b}[0m'\n\
             "]
@@ -1780,12 +1698,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to not start with 'c'\n   \
+            &["expected subject to not start with 'c'\n   \
                    but was: \"\u{1b}[31mc\u{1b}[0mommodo sadipscing id imperdiet\"\n  \
                   expected: not '\u{1b}[32mc\u{1b}[0m'\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -1800,12 +1716,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to end with \"innocence\"\n   \
+            &["expected subject to end with \"innocence\"\n   \
                    but was: \"nulla feugiat il\u{1b}[31mlum culpa\u{1b}[0m\"\n  \
                   expected: \"\u{1b}[32minnocence\u{1b}[0m\"\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -1820,12 +1734,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to end with \"innocence\"\n   \
+            &["expected subject to end with \"innocence\"\n   \
                     but was: \"nulla feugiat il\u{1b}[31mlum culpa\u{1b}[0m\"\n  \
                    expected: \"\u{1b}[32minnocence\u{1b}[0m\"\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -1840,12 +1752,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to not end with \"um culpa\"\n   \
+            &["expected subject to not end with \"um culpa\"\n   \
                    but was: \"nulla feugiat ill\u{1b}[31mum culpa\u{1b}[0m\"\n  \
                   expected: not \"\u{1b}[32mum culpa\u{1b}[0m\"\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -1860,12 +1770,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to not end with \"lpa\"\n   \
+            &["expected subject to not end with \"lpa\"\n   \
                     but was: \"nulla feugiat illum cu\u{1b}[31mlpa\u{1b}[0m\"\n  \
                    expected: not \"\u{1b}[32mlpa\u{1b}[0m\"\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -1880,7 +1788,7 @@ mod colored {
 
         assert_eq!(
             failures,
-            &["assertion failed: expected subject to end with 'e'\n   \
+            &["expected subject to end with 'e'\n   \
                    but was: \"commodo sadipscing id imperdie\u{1b}[31mt\u{1b}[0m\"\n  \
                   expected: '\u{1b}[32me\u{1b}[0m'\n\
             "]
@@ -1898,12 +1806,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to not end with 't'\n   \
+            &["expected subject to not end with 't'\n   \
                    but was: \"commodo sadipscing id imperdie\u{1b}[31mt\u{1b}[0m\"\n  \
                   expected: not '\u{1b}[32mt\u{1b}[0m'\n\
-            "
-            ]
+            "]
         );
     }
 
@@ -1918,12 +1824,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to contain any of ['a', 'b', 'c']\n   \
+            &["expected subject to contain any of ['a', 'b', 'c']\n   \
                     but was: \"\u{1b}[31mproident tempor est sed\u{1b}[0m\"\n  \
                    expected: \u{1b}[34m['a', 'b', 'c']\u{1b}[0m\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -1938,12 +1842,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to contain any of ['a', 'b', 'c']\n   \
+            &["expected subject to contain any of ['a', 'b', 'c']\n   \
                     but was: \"\u{1b}[31mproident tempor est sed\u{1b}[0m\"\n  \
                    expected: \u{1b}[34m['a', 'b', 'c']\u{1b}[0m\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -1958,12 +1860,10 @@ mod colored {
 
         assert_eq!(
             failures,
-            &[
-                "assertion failed: expected subject to contain any of ['a', 'b', 'c']\n   \
+            &["expected subject to contain any of ['a', 'b', 'c']\n   \
                     but was: \"\u{1b}[31mproident tempor est sed\u{1b}[0m\"\n  \
                    expected: \u{1b}[34m['a', 'b', 'c']\u{1b}[0m\n\
-                "
-            ]
+                "]
         );
     }
 
@@ -1979,7 +1879,7 @@ mod colored {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected subject to not contain any of ['r', 'b', 'c']\n   \
+                "expected subject to not contain any of ['r', 'b', 'c']\n   \
                     but was: \"p\u{1b}[31mr\u{1b}[0moident tempo\u{1b}[31mr\u{1b}[0m est sed\"\n  \
                    expected: not [\u{1b}[34m'r'\u{1b}[0m, 'b', 'c']\n\
                 "
@@ -1999,7 +1899,7 @@ mod colored {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected subject to not contain any of ['a', 's', 'e']\n   \
+                "expected subject to not contain any of ['a', 's', 'e']\n   \
                     but was: \"proid\u{1b}[31me\u{1b}[0mnt t\u{1b}[31me\u{1b}[0mmpor \u{1b}[31mes\u{1b}[0mt \u{1b}[31mse\u{1b}[0md\"\n  \
                    expected: not ['a', \u{1b}[34m's'\u{1b}[0m, \u{1b}[34m'e'\u{1b}[0m]\n\
                 "
@@ -2019,7 +1919,7 @@ mod colored {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected subject to not contain any of ['p', 'o', 'r']\n   \
+                "expected subject to not contain any of ['p', 'o', 'r']\n   \
                     but was: \"\u{1b}[31mpro\u{1b}[0mident tem\u{1b}[31mpor\u{1b}[0m est sed\"\n  \
                    expected: not [\u{1b}[34m'p'\u{1b}[0m, \u{1b}[34m'o'\u{1b}[0m, \u{1b}[34m'r'\u{1b}[0m]\n\
                 "
@@ -2046,7 +1946,7 @@ mod colored_regex {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected my_thing to match the regex \\b\\w{12}\\b\n               \
+                "expected my_thing to match the regex \\b\\w{12}\\b\n               \
                                 but was: \u{1b}[31mvolutpat lobortis aliquam diam\u{1b}[0m\n  \
                    does not match regex: \u{1b}[32m\\b\\w{12}\\b\u{1b}[0m\n\
                 "
@@ -2067,7 +1967,7 @@ mod colored_regex {
         assert_eq!(
             failures,
             &[
-                "assertion failed: expected my_thing to not match the regex ^[a-zA-Z0-9 ]{8,32}$\n               \
+                "expected my_thing to not match the regex ^[a-zA-Z0-9 ]{8,32}$\n               \
                              but was: \u{1b}[31mvolutpat lobortis aliquam diam\u{1b}[0m\n      \
                     does match regex: \u{1b}[33m^[a-zA-Z0-9 ]{8,32}$\u{1b}[0m\n\
                 "
diff --git a/src/vec/tests.rs b/src/vec/tests.rs
index 385a826..5eda38b 100644
--- a/src/vec/tests.rs
+++ b/src/vec/tests.rs
@@ -30,12 +30,10 @@ fn verify_vec_is_equal_to_another_vec_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to be equal to [1, 3, 5, 7]
+        &[r"expected my_thing to be equal to [1, 3, 5, 7]
    but was: [2, 4, 6, 8]
   expected: [1, 3, 5, 7]
-"
-        ]
+"]
     );
 }
 
@@ -85,7 +83,7 @@ fn verify_vec_contains_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to contain 42
+        &[r"expected my_thing to contain 42
    but was: [1, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43]
   expected: 42
 "]
@@ -113,7 +111,7 @@ fn verify_vec_does_not_contain_fails() {
 
     assert_eq!(
         failures,
-        &[r"assertion failed: expected my_thing to not contain 19
+        &[r"expected my_thing to not contain 19
    but was: [1, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43]
   expected: not 19
 "]
@@ -141,7 +139,7 @@ fn verify_vec_contains_exactly_in_any_order_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected my_thing to contain exactly in any order [0, 1, 3, 5, 7, 11, 11, 13, 17, 19, 23, 29, 31, 37, 41]
+            r"expected my_thing to contain exactly in any order [0, 1, 3, 5, 7, 11, 11, 13, 17, 19, 23, 29, 31, 37, 41]
    but was: [5, 7, 11, 13, 1, 11, 3, 17, 23, 23, 29, 31, 41, 37, 43]
   expected: [0, 1, 3, 5, 7, 11, 11, 13, 17, 19, 23, 29, 31, 37, 41]
    missing: [0, 19]
@@ -170,7 +168,7 @@ fn verify_vec_contains_any_of_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected my_thing to contain any of [0, 2, 4, 8, 16, 32, 64]
+            r"expected my_thing to contain any of [0, 2, 4, 8, 16, 32, 64]
    but was: [5, 7, 11, 13, 1, 11, 3, 17, 23, 23, 29, 31, 41, 37, 43]
   expected: [0, 2, 4, 8, 16, 32, 64]
 "
@@ -197,7 +195,7 @@ fn verify_vec_does_not_contain_any_of_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected my_thing to not contain any of [2, 20, 4, 40, 8, 80]
+            r"expected my_thing to not contain any of [2, 20, 4, 40, 8, 80]
    but was: [5, 7, 20, 1, 17, 23, 23, 40, 20, 20, 41, 37, 43]
   expected: not [2, 20, 4, 40, 8, 80]
 "
@@ -224,7 +222,7 @@ fn verify_vec_contains_all_of_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected my_thing to contain all of [5, 18, 3, 17, 45, 1, 1, 29, 0]
+            r"expected my_thing to contain all of [5, 18, 3, 17, 45, 1, 1, 29, 0]
    but was: [5, 7, 11, 13, 1, 11, 3, 17, 23, 23, 29, 31, 41, 37, 43]
   expected: [5, 18, 3, 17, 45, 1, 1, 29, 0]
    missing: [18, 45, 0]
@@ -251,13 +249,11 @@ fn verify_vec_contains_only_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to contain only [1, 3, 7, 11, 19]
+        &[r"expected my_thing to contain only [1, 3, 7, 11, 19]
    but was: [5, 11, 1, 3, 19, 17, 11, 43]
   expected: [1, 3, 7, 11, 19]
      extra: [5, 17, 43]
-"
-        ]
+"]
     );
 }
 
@@ -279,14 +275,12 @@ fn verify_vec_contains_only_once_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to contain only once [1, 3, 7, 11, 19]
+        &[r"expected my_thing to contain only once [1, 3, 7, 11, 19]
      but was: [5, 11, 1, 3, 19, 17, 11, 43]
     expected: [1, 3, 7, 11, 19]
        extra: [5, 17, 43]
   duplicates: [11, 11]
-"
-        ]
+"]
     );
 }
 
@@ -337,7 +331,7 @@ fn verify_vec_contains_exactly_fails_out_of_order() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to contain exactly in order ["two", "two", "one", "three", "four", "five", "six", "seven", "four", "eight", "nine"]
+            r#"expected my_thing to contain exactly in order ["two", "two", "one", "three", "four", "five", "six", "seven", "four", "eight", "nine"]
        but was: ["one", "two", "two", "three", "four", "five", "six", "four", "seven", "eight", "nine"]
       expected: ["two", "two", "one", "three", "four", "five", "six", "seven", "four", "eight", "nine"]
        missing: []
@@ -377,7 +371,7 @@ fn verify_vec_contains_exactly_fails_missing_and_extra() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to contain exactly in order ["one", "two", "two", "three", "four", "five", "six", "six", "seven", "four", "eight", "nine"]
+            r#"expected my_thing to contain exactly in order ["one", "two", "two", "three", "four", "five", "six", "six", "seven", "four", "eight", "nine"]
        but was: ["one", "two", "six", "three", "four", "five", "six", "six", "seven", "eleven", "eight", "nine", "ten"]
       expected: ["one", "two", "two", "three", "four", "five", "six", "six", "seven", "four", "eight", "nine"]
        missing: ["two", "four"]
@@ -415,7 +409,7 @@ fn verify_vec_contains_exactly_fails_expected_longer_than_vec() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to contain exactly in order ["one", "two", "two", "three", "four", "five", "six", "four", "seven", "eight", "nine", "ten"]
+            r#"expected my_thing to contain exactly in order ["one", "two", "two", "three", "four", "five", "six", "four", "seven", "eight", "nine", "ten"]
        but was: ["one", "two", "two", "three", "four", "five", "six", "four", "seven", "eight", "nine"]
       expected: ["one", "two", "two", "three", "four", "five", "six", "four", "seven", "eight", "nine", "ten"]
        missing: ["ten"]
@@ -478,7 +472,7 @@ fn verify_vec_contains_sequence_fails() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to contain the sequence ["two", "three", "four", "five", "six", "six", "four"]
+            r#"expected my_thing to contain the sequence ["two", "three", "four", "five", "six", "six", "four"]
    but was: ["one", "two", "two", "three", "four", "five", "six", "four", "two", "seven", "two", "three", "five", "four", "six", "four", "eight", "nine", "ten"]
   expected: ["two", "three", "four", "five", "six", "six", "four"]
    missing: ["six", "four"]
@@ -507,7 +501,7 @@ fn verify_vec_contains_sequence_fails_expected_longer_than_vec() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to contain the sequence ["one", "two", "three", "four", "five", "six", "seven"]
+            r#"expected my_thing to contain the sequence ["one", "two", "three", "four", "five", "six", "seven"]
    but was: ["one", "two", "three", "four", "five", "six"]
   expected: ["one", "two", "three", "four", "five", "six", "seven"]
    missing: ["seven"]
@@ -572,7 +566,7 @@ fn verify_vec_contains_all_in_order_fails() {
     assert_eq!(
         failures,
         &[
-            r#"assertion failed: expected my_thing to contain all of ["one", "two", "two", "seven", "two", "three", "six", "six", "ten"] in order
+            r#"expected my_thing to contain all of ["one", "two", "two", "seven", "two", "three", "six", "six", "ten"] in order
    but was: ["one", "two", "two", "three", "four", "five", "six", "four", "two", "seven", "two", "three", "five", "four", "six", "four", "eight", "nine", "ten"]
   expected: ["one", "two", "two", "seven", "two", "three", "six", "six", "ten"]
    missing: ["six"]
@@ -620,14 +614,12 @@ fn verify_vec_starts_with_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to start with [13, 5, 7, 1, 19]
+        &[r"expected my_thing to start with [13, 5, 7, 1, 19]
    but was: [13, 5, 7, 19, 1, 3, 11, 29, 23, 31, 37]
   expected: [13, 5, 7, 1, 19]
    missing: [1, 19]
      extra: [19, 1]
-"
-        ]
+"]
     );
 }
 
@@ -643,7 +635,7 @@ fn verify_empty_vec_starts_with_expected_sequence_longer_than_vec_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected my_thing to start with [13, 5, 7, 19, 1, 3, 11, 29, 23, 31, 37]
+            r"expected my_thing to start with [13, 5, 7, 19, 1, 3, 11, 29, 23, 31, 37]
    but was: [13, 5, 7, 19, 1, 3, 11, 29, 23, 31]
   expected: [13, 5, 7, 19, 1, 3, 11, 29, 23, 31, 37]
    missing: [37]
@@ -692,14 +684,12 @@ fn verify_vec_ends_with_fails() {
 
     assert_eq!(
         failures,
-        &[
-            r"assertion failed: expected my_thing to end with [11, 23, 23, 31, 73]
+        &[r"expected my_thing to end with [11, 23, 23, 31, 73]
    but was: [13, 5, 7, 19, 1, 3, 11, 29, 23, 31, 37]
   expected: [11, 23, 23, 31, 73]
    missing: [23, 73]
      extra: [29, 37]
-"
-        ]
+"]
     );
 }
 
@@ -715,7 +705,7 @@ fn verify_empty_vec_ends_with_expected_sequence_longer_than_vec_fails() {
     assert_eq!(
         failures,
         &[
-            r"assertion failed: expected my_thing to end with [41, 13, 5, 7, 19, 1, 3, 11, 29, 23, 31]
+            r"expected my_thing to end with [41, 13, 5, 7, 19, 1, 3, 11, 29, 23, 31]
    but was: [13, 5, 7, 19, 1, 3, 11, 29, 23, 31]
   expected: [41, 13, 5, 7, 19, 1, 3, 11, 29, 23, 31]
    missing: [41]
@@ -740,7 +730,7 @@ mod colored {
             .display_failures();
 
         assert_eq!(failures, &[
-            "assertion failed: expected subject to be equal to [1, 3, 5, 7, 11, 13, 19, 23, 29, 31, 37]\n   \
+            "expected subject to be equal to [1, 3, 5, 7, 11, 13, 19, 23, 29, 31, 37]\n   \
                 but was: [\u{1b}[31m13\u{1b}[0m, 5, 7, \u{1b}[31m19\u{1b}[0m, \u{1b}[31m1\u{1b}[0m, \u{1b}[31m3\u{1b}[0m, 11, \u{1b}[31m29\u{1b}[0m, 23, 31, 37]
                expected: [\u{1b}[34m1\u{1b}[0m, \u{1b}[34m3\u{1b}[0m, 5, 7, 11, \u{1b}[34m13\u{1b}[0m, \u{1b}[34m19\u{1b}[0m, 23, \u{1b}[34m29\u{1b}[0m, 31, 37]
             "