diff --git a/core/modules/serialization/lib/Drupal/serialization/Encoder/JsonEncoder.php b/core/modules/serialization/lib/Drupal/serialization/Encoder/JsonEncoder.php
index 1f2e68a..35898a7 100644
--- a/core/modules/serialization/lib/Drupal/serialization/Encoder/JsonEncoder.php
+++ b/core/modules/serialization/lib/Drupal/serialization/Encoder/JsonEncoder.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\serialization\Encoder\JsonEncoder.
+ * Contains \Drupal\serialization\Encoder\JsonEncoder.
  */
 
 namespace Drupal\serialization\Encoder;
diff --git a/core/modules/serialization/lib/Drupal/serialization/Encoder/XmlEncoder.php b/core/modules/serialization/lib/Drupal/serialization/Encoder/XmlEncoder.php
index 170a37d..1f25389 100644
--- a/core/modules/serialization/lib/Drupal/serialization/Encoder/XmlEncoder.php
+++ b/core/modules/serialization/lib/Drupal/serialization/Encoder/XmlEncoder.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\serialization\Encoder\XmlEncoder.
+ * Contains \Drupal\serialization\Encoder\XmlEncoder.
  */
 
 namespace Drupal\serialization\Encoder;
diff --git a/core/modules/serialization/lib/Drupal/serialization/Normalizer/ComplexDataNormalizer.php b/core/modules/serialization/lib/Drupal/serialization/Normalizer/ComplexDataNormalizer.php
index 3d0426e..456cc0e 100644
--- a/core/modules/serialization/lib/Drupal/serialization/Normalizer/ComplexDataNormalizer.php
+++ b/core/modules/serialization/lib/Drupal/serialization/Normalizer/ComplexDataNormalizer.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\serialization\Normalizer\ComplexDataNormalizer.
+ * Contains \Drupal\serialization\Normalizer\ComplexDataNormalizer.
  */
 
 namespace Drupal\serialization\Normalizer;
diff --git a/core/modules/serialization/lib/Drupal/serialization/Normalizer/ListNormalizer.php b/core/modules/serialization/lib/Drupal/serialization/Normalizer/ListNormalizer.php
index 4b93cab..32c3f68 100644
--- a/core/modules/serialization/lib/Drupal/serialization/Normalizer/ListNormalizer.php
+++ b/core/modules/serialization/lib/Drupal/serialization/Normalizer/ListNormalizer.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\serialization\Normalizer\ListNormalizer.
+ * Contains \Drupal\serialization\Normalizer\ListNormalizer.
  */
 
 namespace Drupal\serialization\Normalizer;
diff --git a/core/modules/serialization/lib/Drupal/serialization/Normalizer/NormalizerBase.php b/core/modules/serialization/lib/Drupal/serialization/Normalizer/NormalizerBase.php
index 7779682..c30cd3e 100644
--- a/core/modules/serialization/lib/Drupal/serialization/Normalizer/NormalizerBase.php
+++ b/core/modules/serialization/lib/Drupal/serialization/Normalizer/NormalizerBase.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\serialization\Normalizer\NormalizerBase.
+ * Contains \Drupal\serialization\Normalizer\NormalizerBase.
  */
 
 namespace Drupal\serialization\Normalizer;
diff --git a/core/modules/serialization/lib/Drupal/serialization/Normalizer/TypedDataNormalizer.php b/core/modules/serialization/lib/Drupal/serialization/Normalizer/TypedDataNormalizer.php
index 05027f0..38e9505 100644
--- a/core/modules/serialization/lib/Drupal/serialization/Normalizer/TypedDataNormalizer.php
+++ b/core/modules/serialization/lib/Drupal/serialization/Normalizer/TypedDataNormalizer.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\serialization\Normalizer\TypedDataNormalizer.
+ * Contains \Drupal\serialization\Normalizer\TypedDataNormalizer.
  */
 
 namespace Drupal\serialization\Normalizer;
diff --git a/core/modules/serialization/lib/Drupal/serialization/RegisterSerializationClassesCompilerPass.php b/core/modules/serialization/lib/Drupal/serialization/RegisterSerializationClassesCompilerPass.php
index 4c03887..e48af2e 100644
--- a/core/modules/serialization/lib/Drupal/serialization/RegisterSerializationClassesCompilerPass.php
+++ b/core/modules/serialization/lib/Drupal/serialization/RegisterSerializationClassesCompilerPass.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\serialization\RegisterSerializationClassesCompilerPass.
+ * Contains \Drupal\serialization\RegisterSerializationClassesCompilerPass.
  */
 
 namespace Drupal\serialization;
diff --git a/core/modules/serialization/lib/Drupal/serialization/SerializationBundle.php b/core/modules/serialization/lib/Drupal/serialization/SerializationBundle.php
index ebde419..8be9661 100644
--- a/core/modules/serialization/lib/Drupal/serialization/SerializationBundle.php
+++ b/core/modules/serialization/lib/Drupal/serialization/SerializationBundle.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\rest\SerializationBundle.
+ * Contains \Drupal\serialization\SerializationBundle.
  */
 
 namespace Drupal\serialization;
diff --git a/core/modules/serialization/lib/Drupal/serialization/Tests/EntitySerializationTest.php b/core/modules/serialization/lib/Drupal/serialization/Tests/EntitySerializationTest.php
index 4d61057..d5dc025 100644
--- a/core/modules/serialization/lib/Drupal/serialization/Tests/EntitySerializationTest.php
+++ b/core/modules/serialization/lib/Drupal/serialization/Tests/EntitySerializationTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\serialization\Tests\EntitySerializationTest.
+ * Contains \Drupal\serialization\Tests\EntitySerializationTest.
  */
 
 namespace Drupal\serialization\Tests;
diff --git a/core/modules/serialization/lib/Drupal/serialization/Tests/SerializationTest.php b/core/modules/serialization/lib/Drupal/serialization/Tests/SerializationTest.php
index 33845d0..e0c62cd 100644
--- a/core/modules/serialization/lib/Drupal/serialization/Tests/SerializationTest.php
+++ b/core/modules/serialization/lib/Drupal/serialization/Tests/SerializationTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains Drupal\serialization\Tests\SerializationTest.
+ * Contains \Drupal\serialization\Tests\SerializationTest.
  */
 
 namespace Drupal\serialization\Tests;
diff --git a/core/modules/serialization/tests/serialization_test/lib/Drupal/serialization_test/SerializationTestBundle.php b/core/modules/serialization/tests/serialization_test/lib/Drupal/serialization_test/SerializationTestBundle.php
index 13b6a66..ab9f0f1 100644
--- a/core/modules/serialization/tests/serialization_test/lib/Drupal/serialization_test/SerializationTestBundle.php
+++ b/core/modules/serialization/tests/serialization_test/lib/Drupal/serialization_test/SerializationTestBundle.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\serialization_test\SerializationTestBundle.
+ * Contains \Drupal\serialization_test\SerializationTestBundle.
  */
 
 namespace Drupal\serialization_test;
diff --git a/core/modules/serialization/tests/serialization_test/lib/Drupal/serialization_test/SerializationTestEncoder.php b/core/modules/serialization/tests/serialization_test/lib/Drupal/serialization_test/SerializationTestEncoder.php
index 2f3896d..7d15f30 100644
--- a/core/modules/serialization/tests/serialization_test/lib/Drupal/serialization_test/SerializationTestEncoder.php
+++ b/core/modules/serialization/tests/serialization_test/lib/Drupal/serialization_test/SerializationTestEncoder.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\serialization_test\SerializationTestEncoder.
+ * Contains \Drupal\serialization_test\SerializationTestEncoder.
  */
 
 namespace Drupal\serialization_test;
diff --git a/core/modules/serialization/tests/serialization_test/lib/Drupal/serialization_test/SerializationTestNormalizer.php b/core/modules/serialization/tests/serialization_test/lib/Drupal/serialization_test/SerializationTestNormalizer.php
index 81478c5..8b5c4f7 100644
--- a/core/modules/serialization/tests/serialization_test/lib/Drupal/serialization_test/SerializationTestNormalizer.php
+++ b/core/modules/serialization/tests/serialization_test/lib/Drupal/serialization_test/SerializationTestNormalizer.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\serialization_test\SerializationTestNormalizer.
+ * Contains \Drupal\serialization_test\SerializationTestNormalizer.
  */
 
 namespace Drupal\serialization_test;