diff --git a/spec/system/comment_anchoring_spec.rb b/spec/system/comment_anchoring_spec.rb
index 706c53f..c7b4f47 100644
--- a/spec/system/comment_anchoring_spec.rb
+++ b/spec/system/comment_anchoring_spec.rb
@@ -34,6 +34,7 @@
     visit sign_in_path
     fill_in "Email address", with: user.email
     click_button "Sign In"
+    expect(page).to have_current_path(root_path)
     expect(page).to have_content("Sign out")
   end
 
diff --git a/spec/system/comment_ux_spec.rb b/spec/system/comment_ux_spec.rb
index fff1cd5..aa492e3 100644
--- a/spec/system/comment_ux_spec.rb
+++ b/spec/system/comment_ux_spec.rb
@@ -34,6 +34,11 @@ def sign_in(user)
     visit sign_in_path
     fill_in "Email address", with: user.email
     click_button "Sign In"
+    # Wait for the Turbo-driven redirect to the plans index to complete before
+    # asserting page content; without this, Selenium can reference a stale DOM
+    # node from the sign-in page mid-navigation, causing "Node with given id
+    # does not belong to the document".
+    expect(page).to have_current_path(root_path)
     expect(page).to have_content("Sign out")
   end
 
diff --git a/spec/system/tokens_spec.rb b/spec/system/tokens_spec.rb
index 7104ede..45e686c 100644
--- a/spec/system/tokens_spec.rb
+++ b/spec/system/tokens_spec.rb
@@ -5,6 +5,7 @@
     visit sign_in_path
     fill_in "Email address", with: "testuser@example.com"
     click_button "Sign In"
+    expect(page).to have_current_path(root_path)
     expect(page).to have_content("Sign out")
   end