diff --git a/core/modules/system/lib/Drupal/system/Tests/Plugin/AlterDecoratorTest.php b/core/modules/system/lib/Drupal/system/Tests/Plugin/AlterDecoratorTest.php
index c6676ecffba421cd50317f56893c97ac80939720..bcbf8b46f26098b290fcda8159ca78cf5b3ce335 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Plugin/AlterDecoratorTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Plugin/AlterDecoratorTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\system\Tests\Plugin\AlterDecoratorTest.
+ * Contains \Drupal\system\Tests\Plugin\AlterDecoratorTest.
  */
 
 namespace Drupal\system\Tests\Plugin;
diff --git a/core/modules/system/lib/Drupal/system/Tests/Plugin/CacheDecoratorLanguageTest.php b/core/modules/system/lib/Drupal/system/Tests/Plugin/CacheDecoratorLanguageTest.php
index 1afeca5c3adb0c1740de87a975738a18026087c4..4aa6270050457afa67b7a2597a77acc5ff0e32ef 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Plugin/CacheDecoratorLanguageTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Plugin/CacheDecoratorLanguageTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\system\Tests\Plugin\CacheDecoratorLanguageTest.
+ * Contains \Drupal\system\Tests\Plugin\CacheDecoratorLanguageTest.
  */
 
 namespace Drupal\system\Tests\Plugin;
diff --git a/core/modules/system/lib/Drupal/system/Tests/Plugin/DerivativeTest.php b/core/modules/system/lib/Drupal/system/Tests/Plugin/DerivativeTest.php
index 226b28d6f290c537def3ff2bfe5cf2a75d98a9f5..44568081ef317a97570d81200d37ecc484dc21b7 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Plugin/DerivativeTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Plugin/DerivativeTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\system\Tests\Plugin\DerivativeTest.
+ * Contains \Drupal\system\Tests\Plugin\DerivativeTest.
  */
 
 namespace Drupal\system\Tests\Plugin;
diff --git a/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/AnnotatedClassDiscoveryTest.php b/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/AnnotatedClassDiscoveryTest.php
index 6f43b57b8067b443be83f0c7171493e9ea243530..d2fba9b13505b42ddf1c56c9a279d9cad5e750c2 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/AnnotatedClassDiscoveryTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/AnnotatedClassDiscoveryTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\system\Tests\Plugin\Discovery\AnnotatedClassDiscoveryTest.
+ * Contains \Drupal\system\Tests\Plugin\Discovery\AnnotatedClassDiscoveryTest.
  */
 
 namespace Drupal\system\Tests\Plugin\Discovery;
diff --git a/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/DiscoveryTestBase.php b/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/DiscoveryTestBase.php
index e95d238b0616eda028179fe45afadf6daa67c165..0926065751e561cc123902b714b8189b960380a0 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/DiscoveryTestBase.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/DiscoveryTestBase.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\system\Tests\Plugin\Discovery\DiscoveryTestBase.
+ * Contains \Drupal\system\Tests\Plugin\Discovery\DiscoveryTestBase.
  */
 
 namespace Drupal\system\Tests\Plugin\Discovery;
diff --git a/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/StaticDiscoveryTest.php b/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/StaticDiscoveryTest.php
index c0adf9ffdef8c85356e2bd5021df1313d0536e7a..581c1c3f1eea0f2ae2d0538965b7c5ab3bf0d874 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/StaticDiscoveryTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Plugin/Discovery/StaticDiscoveryTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\system\Tests\Plugin\Discovery\StaticDiscoveryTest.
+ * Contains \Drupal\system\Tests\Plugin\Discovery\StaticDiscoveryTest.
  */
 
 namespace Drupal\system\Tests\Plugin\Discovery;
diff --git a/core/modules/system/lib/Drupal/system/Tests/Plugin/FactoryTest.php b/core/modules/system/lib/Drupal/system/Tests/Plugin/FactoryTest.php
index 20bbf9ee88148f7ed5b61bea7247631d9c488c22..53c54306b813742447f96b2e98d566d6ec0e110d 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Plugin/FactoryTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Plugin/FactoryTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\system\Tests\Plugin\FactoryTest.
+ * Contains \Drupal\system\Tests\Plugin\FactoryTest.
  */
 
 namespace Drupal\system\Tests\Plugin;
diff --git a/core/modules/system/lib/Drupal/system/Tests/Plugin/InspectionTest.php b/core/modules/system/lib/Drupal/system/Tests/Plugin/InspectionTest.php
index 2f8168fd175b10a041f2f2bfb0644396f2896e52..d60feb0d2ce7ff38617c05a294aecbf173afb6c0 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Plugin/InspectionTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Plugin/InspectionTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\system\Tests\Plugin\InspectionTest
+ * Contains \Drupal\system\Tests\Plugin\InspectionTest
  */
 
 namespace Drupal\system\Tests\Plugin;
diff --git a/core/modules/system/lib/Drupal/system/Tests/Plugin/PluginTestBase.php b/core/modules/system/lib/Drupal/system/Tests/Plugin/PluginTestBase.php
index c73fd671d660ee91d3b5557b779d7849d73aede1..917e4e724387df12ac4317dd7884638142e52de6 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Plugin/PluginTestBase.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Plugin/PluginTestBase.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\system\Tests\Plugin\PluginTestBase.
+ * Contains \Drupal\system\Tests\Plugin\PluginTestBase.
  */
 
 namespace Drupal\system\Tests\Plugin;