diff --git a/core/modules/system/tests/src/Unit/SystemRequirementsTest.php b/core/modules/system/tests/src/Unit/SystemRequirementsTest.php
index abd79ca550b5dab300c553839b730acc8db1fcb8..4a7f9c70805013bb8b60dea8c374fe5fc114c4f3 100644
--- a/core/modules/system/tests/src/Unit/SystemRequirementsTest.php
+++ b/core/modules/system/tests/src/Unit/SystemRequirementsTest.php
@@ -6,12 +6,13 @@
 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 20a91d0d41bc4085813bb0c24f31b17e365b3999..5218ec2a79e43903a225eff1c70c186ff501c5a8 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryCachedTraitTest.php
@@ -5,8 +5,8 @@
 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 7a5761b81f35e4710c18f9dd9078070d1754e109..9f747f91b199a4dce3aab32301038d9c8d223539 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Discovery/DiscoveryTraitTest.php
@@ -6,7 +6,7 @@
 
 /**
  * @group Plugin
- * @coversDefaultClass Drupal\Component\Plugin\Discovery\DiscoveryTrait
+ * @coversDefaultClass \Drupal\Component\Plugin\Discovery\DiscoveryTrait
  */
 class DiscoveryTraitTest extends UnitTestCase {
 
@@ -58,9 +58,9 @@ 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, $plugin_id) {
     // Mock the trait.
@@ -96,9 +96,9 @@ public function testGetDefinition($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 dc54eba2fc9159524eca73e485d16c1ca135586a..bdab19c7ef4e0298307bce31b3364532f94a0800 100644
--- a/core/tests/Drupal/Tests/Component/Plugin/Discovery/StaticDiscoveryDecoratorTest.php
+++ b/core/tests/Drupal/Tests/Component/Plugin/Discovery/StaticDiscoveryDecoratorTest.php
@@ -6,7 +6,7 @@
 
 /**
  * @group Plugin
- * @coversDefaultClass Drupal\Component\Plugin\Discovery\StaticDiscoveryDecorator
+ * @coversDefaultClass \Drupal\Component\Plugin\Discovery\StaticDiscoveryDecorator
  */
 class StaticDiscoveryDecoratorTest extends UnitTestCase {
 
@@ -17,7 +17,7 @@ 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 d6cc8c65c200b5c02ff59ee262dc9ecf10d45222..4bb3a98daf780a58ff5970215eeab7d726c0736e 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 95fad821b24a23a1b6c4b332d6261775caf6cf45..7f084e4fb0804fc811427d76d1c7480d693284c4 100644
--- a/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionTest.php
+++ b/core/tests/Drupal/Tests/Core/Plugin/Context/ContextDefinitionTest.php
@@ -10,7 +10,7 @@
  *
  * @group Plugin
  *
- * @coversDefaultClass Drupal\Core\Plugin\Context\ContextDefinition
+ * @coversDefaultClass \Drupal\Core\Plugin\Context\ContextDefinition
  */
 class ContextDefinitionTest extends UnitTestCase {
 
@@ -113,7 +113,7 @@ 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 4c09f592f50e777d2ced37545b9d5efc9cf8c0bc..12f36eac2936a315ecfee3f8f7c89e5296781ba0 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
@@ -15,7 +15,7 @@
 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 {