diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 2891a76..1b832cd 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,14 +1,14 @@
 repos:
-  - repo: https://github.com/psf/black
-    rev: 23.10.1
+  - repo: https://github.com/psf/black-pre-commit-mirror
+    rev: 26.3.1
     hooks:
       - id: black
   - repo: https://github.com/PyCQA/flake8
-    rev: "6.1.0"
+    rev: "7.3.0"
     hooks:
       - id: flake8
   - repo: https://github.com/asottile/pyupgrade
-    rev: v3.15.0
+    rev: v3.21.2
     hooks:
     - id: pyupgrade
       args: [--py36-plus]
diff --git a/more/webassets/tests/test_webassets.py b/more/webassets/tests/test_webassets.py
index 7389d63..1eb521f 100644
--- a/more/webassets/tests/test_webassets.py
+++ b/more/webassets/tests/test_webassets.py
@@ -17,47 +17,37 @@ def prepare_fixtures(directory):
     # if those javascripts are changed, the tests below need to be updated
     # with the correct md5 hashes
     with open(os.path.join(directory, "common", "jquery.js"), "w") as f:
-        f.write(
-            """
+        f.write("""
             /* fake jquery */
             var $ = function(){};
-        """
-        )
+        """)
 
     with open(os.path.join(directory, "common", "underscore.js"), "w") as f:
-        f.write(
-            """
+        f.write("""
             /* fake underscore */
             var _ = function(){};
-        """
-        )
+        """)
 
     with open(os.path.join(directory, "theme", "main.scss"), "w") as f:
-        f.write(
-            """
+        f.write("""
             body {
                 a {
                     color: blue;
                 }
             }
-        """
-        )
+        """)
 
     with open(os.path.join(directory, "theme", "other.css"), "w") as f:
-        f.write(
-            """
+        f.write("""
             h1 {
                 font-size: 2rem;
             }
-        """
-        )
+        """)
 
     with open(os.path.join(directory, "common", "extra.js"), "w") as f:
-        f.write(
-            """
+        f.write("""
             $(document).ready(function(){});
-        """
-        )
+        """)
 
 
 def spawn_test_app(tempdir):