diff --git a/core/modules/system/tests/src/Unit/SystemRequirementsTest.php b/core/modules/system/tests/src/Unit/SystemRequirementsTest.php
index f53f24b..be7921d 100644
--- a/core/modules/system/tests/src/Unit/SystemRequirementsTest.php
+++ b/core/modules/system/tests/src/Unit/SystemRequirementsTest.php
@@ -11,12 +11,13 @@
 use Drupal\Tests\UnitTestCase;
 
 /**
- * @coversDefaultClass Drupal\system\SystemRequirements
+ * @coversDefaultClass \Drupal\system\SystemRequirements
  * @group system
  */
 class SystemRequirementsTest extends UnitTestCase {
 
   /**
+   * @covers ::phpVersionWithPdoDisallowMultipleStatements
    * @dataProvider providerTestPhpVersionWithPdoDisallowMultipleStatements
    */
   public function testPhpVersionWithPdoDisallowMultipleStatements($version, $expected) {
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php b/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php
index c0cf171..b6ea1c3 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php
@@ -10,8 +10,8 @@
 use Drupal\Tests\UnitTestCase;
 
 /**
- * @coversDefaultClass Drupal\Component\Plugin\Discovery\DiscoveryCachedTrait
- * @uses Drupal\Component\Plugin\Discovery\DiscoveryTrait
+ * @coversDefaultClass \Drupal\Component\Plugin\Discovery\DiscoveryCachedTrait
+ * @uses \Drupal\Component\Plugin\Discovery\DiscoveryTrait
  * @group Plugin
  */
 class DiscoveryCachedTraitTest extends UnitTestCase {
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php b/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php
index 9095e01..8e64aa2 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php
@@ -11,7 +11,7 @@
 
 /**
  * @group Plugin
- * @coversDefaultClass Drupal\Component\Plugin\Discovery\DiscoveryTrait
+ * @coversDefaultClass \Drupal\Component\Plugin\Discovery\DiscoveryTrait
  */
 class DiscoveryTraitTest extends UnitTestCase {
 
@@ -63,9 +63,9 @@ public function providerDoGetDefinitionException() {
 
   /**
    * @covers ::doGetDefinition
-   * @expectedException Drupal\Component\Plugin\Exception\PluginNotFoundException
+   * @expectedException \Drupal\Component\Plugin\Exception\PluginNotFoundException
    * @dataProvider providerDoGetDefinitionException
-   * @uses Drupal\Component\Plugin\Exception\PluginNotFoundException
+   * @uses \Drupal\Component\Plugin\Exception\PluginNotFoundException
    */
   public function testDoGetDefinitionException($expected, $definitions, $plugin_id) {
     // Mock the trait.
@@ -101,9 +101,9 @@ public function testGetDefinition($expected, $definitions, $plugin_id) {
 
   /**
    * @covers ::getDefinition
-   * @expectedException Drupal\Component\Plugin\Exception\PluginNotFoundException
+   * @expectedException \Drupal\Component\Plugin\Exception\PluginNotFoundException
    * @dataProvider providerDoGetDefinitionException
-   * @uses Drupal\Component\Plugin\Exception\PluginNotFoundException
+   * @uses \Drupal\Component\Plugin\Exception\PluginNotFoundException
    */
   public function testGetDefinitionException($expected, $definitions, $plugin_id) {
     // Since getDefinition is a wrapper around doGetDefinition(), we can re-use
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Discovery/StaticDiscoveryDecoratorTest.php b/core/tests/Drupal/Tests/Component/Plugin/Discovery/StaticDiscoveryDecoratorTest.php
index 2daa1a2..3dfc3f8 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Discovery/StaticDiscoveryDecoratorTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Discovery/StaticDiscoveryDecoratorTest.php
@@ -11,7 +11,7 @@
 
 /**
  * @group Plugin
- * @coversDefaultClass Drupal\Component\Plugin\Discovery\StaticDiscoveryDecorator
+ * @coversDefaultClass \Drupal\Component\Plugin\Discovery\StaticDiscoveryDecorator
  */
 class StaticDiscoveryDecoratorTest extends UnitTestCase {
 
@@ -22,7 +22,7 @@ class StaticDiscoveryDecoratorTest extends UnitTestCase {
    * \Callable in the mock object. The return value of this callback is
    * never used.
    *
-   * @return mock
+   * @return \PHPUnit_Framework_MockObject_MockObject
    *   Mocked object with expectation of registerDefinitionsCallback() being
    *   called once.
    */
diff --git a/core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php b/core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php
index d6cc8c6..4bb3a98 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Factory/ReflectionFactoryTest.php
@@ -14,7 +14,7 @@
 
 /**
  * @group Plugin
- * @coversDefaultClass Drupal\Component\Plugin\Factory\ReflectionFactory
+ * @coversDefaultClass \Drupal\Component\Plugin\Factory\ReflectionFactory
  */
 class ReflectionFactoryTest extends UnitTestCase {
 
diff --git a/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionTest.php b/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionTest.php
index 1a871bb..edbb1e5 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionTest.php
@@ -15,7 +15,7 @@
  *
  * @group Plugin
  *
- * @coversDefaultClass Drupal\Core\Plugin\Context\ContextDefinition
+ * @coversDefaultClass \Drupal\Core\Plugin\Context\ContextDefinition
  */
 class ContextDefinitionTest extends UnitTestCase {
 
@@ -118,7 +118,7 @@ public function testGetDataDefinition($is_multiple) {
    * @dataProvider providerGetDataDefinition
    * @covers ::getDataDefinition
    * @uses \Drupal
-   * @uses Drupal\Component\Utility\SafeMarkup
+   * @uses \Drupal\Component\Utility\SafeMarkup
    */
   public function testGetDataDefinitionInvalidType($is_multiple) {
     // Since we're trying to make getDataDefinition() throw an exception in
diff --git a/core/tests/Drupal/Tests/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidatorTest.php b/core/tests/Drupal/Tests/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidatorTest.php
index 34df3ef..5900b94 100644
--- a/core/tests/Drupal/Tests/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidatorTest.php
+++ b/core/tests/Drupal/Tests/Core/Validation/Plugin/Validation/Constraint/PrimitiveTypeConstraintValidatorTest.php
@@ -20,7 +20,7 @@
 use Drupal\Tests\UnitTestCase;
 
 /**
- * @coversDefaultClass Drupal\Core\Validation\Plugin\Validation\Constraint\PrimitiveTypeConstraintValidator
+ * @coversDefaultClass \Drupal\Core\Validation\Plugin\Validation\Constraint\PrimitiveTypeConstraintValidator
  * @group validation
  */
 class PrimitiveTypeConstraintValidatorTest extends UnitTestCase {