diff --git a/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldTypeDefaultsTest.php b/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldTypeDefaultsTest.php
index 809912c..5553852 100644
--- a/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldTypeDefaultsTest.php
+++ b/core/modules/field/tests/src/Unit/Plugin/migrate/process/d6/FieldTypeDefaultsTest.php
@@ -13,12 +13,14 @@
 /**
  * Tests D6 fields defaults.
  *
+ * @coversDefaultClass \Drupal\field\Plugin\migrate\process\d6\FieldTypeDefaults
  * @group field
  */
 class FieldTypeDefaultsTest extends MigrateProcessTestCase {
 
   /**
    * Test that various default cases.
+   * @covers ::transform
    */
   public function testDefaults() {
     $plugin = new FieldTypeDefaults([], 'field_type_defaults', []);
@@ -34,6 +36,7 @@ public function testDefaults() {
 
   /**
    * @expectedException \Drupal\migrate\MigrateSkipRowException
+   * @covers ::transform
    */
   public function testDefaultsException() {
     $plugin = new FieldTypeDefaults([], 'field_type_defaults', []);