diff --git a/skills/test-driven-development/SKILL.md b/skills/test-driven-development/SKILL.md
index 158cb0b5..d6f4e7c7 100644
--- a/skills/test-driven-development/SKILL.md
+++ b/skills/test-driven-development/SKILL.md
@@ -203,7 +203,7 @@ Next failing test for next feature.
 | **Clear** | Name describes behavior | `test('test1')` |
 | **Shows intent** | Demonstrates desired API | Obscures what code should do |
 
-When adding mocks or test utilities, read [writing-good-tests.md](writing-good-tests.md) for the rules that keep tests honest:
+When writing or changing any test, read [writing-good-tests.md](writing-good-tests.md) for the rules that keep tests honest:
 - Assert on real behavior, never on mock behavior
 - Keep test-only code in test utilities, out of production classes
 - Understand a dependency's side effects before mocking it