diff --git a/core/modules/system/src/Tests/Asset/ResolvedLibraryDefinitionsFilesMatchTest.php b/core/modules/system/src/Tests/Asset/ResolvedLibraryDefinitionsFilesMatchTest.php
index 57baf02..4aeadd3 100644
--- a/core/modules/system/src/Tests/Asset/ResolvedLibraryDefinitionsFilesMatchTest.php
+++ b/core/modules/system/src/Tests/Asset/ResolvedLibraryDefinitionsFilesMatchTest.php
@@ -10,7 +10,7 @@
 use Drupal\simpletest\KernelTestBase;
 
 /**
- * Tests that the defined library files for all core extensions actually exist.
+ * Tests that the asset files for all core libraries exist.
  *
  * This test also changes the active theme to each core theme to verify
  * the libraries after theme-level libraries-override and libraries-extend are