diff --git a/core/modules/locale/src/Tests/LocaleLocaleLookupTest.php b/core/modules/locale/src/Tests/LocaleLocaleLookupTest.php
index 908ff19cab8428cca2ef2722ffc70717aa7f481c..df32c028f1affd2780e0ce8a4c8862063d73eb2f 100644
--- a/core/modules/locale/src/Tests/LocaleLocaleLookupTest.php
+++ b/core/modules/locale/src/Tests/LocaleLocaleLookupTest.php
@@ -10,6 +10,9 @@
 use Drupal\Core\Language\Language;
 use Drupal\simpletest\WebTestBase;
 
+/**
+ * Tests that LocaleLookup does not cause circular references.
+ */
 class LocaleLocaleLookupTest extends WebTestBase {
 
   /**
diff --git a/core/modules/migrate/tests/src/process/CallbackTest.php b/core/modules/migrate/tests/src/process/CallbackTest.php
index c4ace45573ba1ffd01979691f3350923737b42ed..1a29ab902db81fe0e8474e045f74151fe5d5ccda 100644
--- a/core/modules/migrate/tests/src/process/CallbackTest.php
+++ b/core/modules/migrate/tests/src/process/CallbackTest.php
@@ -10,6 +10,8 @@
 use Drupal\migrate\Plugin\migrate\process\Callback;
 
 /**
+ * Tests the callback process plugin.
+ *
  * @group migrate
  * @group Drupal
  */
diff --git a/core/modules/migrate/tests/src/process/ConcatTest.php b/core/modules/migrate/tests/src/process/ConcatTest.php
index 22be55eb6020341fc28b3064215f0d8b347ca1ac..a189fe1dbf12343fd2806c463e120393b5236cae 100644
--- a/core/modules/migrate/tests/src/process/ConcatTest.php
+++ b/core/modules/migrate/tests/src/process/ConcatTest.php
@@ -10,6 +10,8 @@
 use Drupal\migrate\Plugin\migrate\process\Concat;
 
 /**
+ * Tests the concat process plugin.
+ *
  * @group migrate
  * @group Drupal
  */
diff --git a/core/modules/migrate/tests/src/process/GetTest.php b/core/modules/migrate/tests/src/process/GetTest.php
index a268e134300ff65fac97f2a729940e702b88c4aa..daedc089c955877fc14aba5f264416bb5f38b034 100644
--- a/core/modules/migrate/tests/src/process/GetTest.php
+++ b/core/modules/migrate/tests/src/process/GetTest.php
@@ -10,6 +10,8 @@
 use Drupal\migrate\Row;
 
 /**
+ * Tests the get process plugin.
+ *
  * @group migrate
  * @group Drupal
  */
diff --git a/core/modules/migrate/tests/src/process/StaticMapTest.php b/core/modules/migrate/tests/src/process/StaticMapTest.php
index 774afba817ffc8c4a0d6863fca82f629c67912f9..90445267773b8b2bcf26b6e481399999991ffebb 100644
--- a/core/modules/migrate/tests/src/process/StaticMapTest.php
+++ b/core/modules/migrate/tests/src/process/StaticMapTest.php
@@ -9,6 +9,8 @@
 use Drupal\migrate\Plugin\migrate\process\StaticMap;
 
 /**
+ * Tests the static map process plugin.
+ *
  * @group migrate
  * @group Drupal
  */
diff --git a/core/modules/migrate_drupal/tests/src/source/VariableTest.php b/core/modules/migrate_drupal/tests/src/source/VariableTest.php
index b5da66bb628a3fb77f297a71a0540fa49fd85d43..9b1f0b7b64e832688127b87c2ef237af4fb1fdde 100644
--- a/core/modules/migrate_drupal/tests/src/source/VariableTest.php
+++ b/core/modules/migrate_drupal/tests/src/source/VariableTest.php
@@ -10,6 +10,8 @@
 use Drupal\migrate\Tests\MigrateSqlSourceTestCase;
 
 /**
+ * Tests the variable source plugin.
+ *
  * @group migrate_drupal
  * @group Drupal
  */
diff --git a/core/modules/migrate_drupal/tests/src/source/d6/Drupal6SqlBaseTest.php b/core/modules/migrate_drupal/tests/src/source/d6/Drupal6SqlBaseTest.php
index b8c7c96fb93526245ce41469663c9770e06daf41..5cb192e0a25d5d01a71d9896456c6f23fc092edb 100644
--- a/core/modules/migrate_drupal/tests/src/source/d6/Drupal6SqlBaseTest.php
+++ b/core/modules/migrate_drupal/tests/src/source/d6/Drupal6SqlBaseTest.php
@@ -10,6 +10,8 @@
 use Drupal\migrate\Tests\MigrateTestCase;
 
 /**
+ * Tests the D6 SQL base class.
+ *
  * @group migrate_drupal
  * @group Drupal
  */
diff --git a/core/tests/Drupal/Tests/Core/Path/PathMatcherTest.php b/core/tests/Drupal/Tests/Core/Path/PathMatcherTest.php
index 6c43478b1b0575608690007a7c17a048050b5189..6627c2983c2fa8bb7f3e50837dc480ad092bcda8 100644
--- a/core/tests/Drupal/Tests/Core/Path/PathMatcherTest.php
+++ b/core/tests/Drupal/Tests/Core/Path/PathMatcherTest.php
@@ -12,6 +12,8 @@
 use Drupal\Tests\UnitTestCase;
 
 /**
+ * Tests that path matching is working properly.
+ *
  * @group Drupal
  * @see \Drupal\Core\Path\PathMatcher
  */