diff --git a/core/lib/Drupal/Core/Entity/EntityRevisionLogInterface.php b/core/lib/Drupal/Core/Entity/EntityRevisionLogInterface.php
index 043e4c5..8793ee9 100644
--- a/core/lib/Drupal/Core/Entity/EntityRevisionLogInterface.php
+++ b/core/lib/Drupal/Core/Entity/EntityRevisionLogInterface.php
@@ -6,11 +6,12 @@
  */
 
 namespace Drupal\Core\Entity;
+use Drupal\user\UserInterface;
 
 /**
  * Defines an entity type with create time/author/log information for revisions.
  */
-interface EntityRevisionLogInterface {
+interface EntityRevisionLogInterface extends RevisionableInterface {
 
   /**
    * Gets the entity revision creation timestamp.
@@ -48,7 +49,7 @@ public function getRevisionUser();
    *
    * @return $this
    */
-  public function setRevisionUser($account);
+  public function setRevisionUser(UserInterface $account);
 
   /**
    * Gets the entity revision author ID.
diff --git a/core/lib/Drupal/Core/Entity/RevisionableContentEntityBase.php b/core/lib/Drupal/Core/Entity/RevisionableContentEntityBase.php
index 1500a05..34b6955 100644
--- a/core/lib/Drupal/Core/Entity/RevisionableContentEntityBase.php
+++ b/core/lib/Drupal/Core/Entity/RevisionableContentEntityBase.php
@@ -15,7 +15,7 @@
  *
  * @ingroup entity_api
  */
-abstract class RevisionableContentEntityBase extends ContentEntityBase {
+abstract class RevisionableContentEntityBase extends ContentEntityBase implements EntityRevisionLogInterface {
 
   /**
    * {@inheritdoc}
diff --git a/core/tests/Drupal/KernelTests/Core/Entity/RevisionableContentEntityBaseTest.php b/core/tests/Drupal/KernelTests/Core/Entity/RevisionableContentEntityBaseTest.php
index e1ce5d7..07dfacf 100644
--- a/core/tests/Drupal/KernelTests/Core/Entity/RevisionableContentEntityBaseTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Entity/RevisionableContentEntityBaseTest.php
@@ -9,6 +9,7 @@
 
 use Drupal\entity_test\Entity\EntityTestWithRevisionLog;
 use Drupal\Tests\token\Kernel\KernelTestBase;
+use Drupal\user\Entity\User;
 
 /**
  * @coversDefaultClass \Drupal\Core\Entity\RevisionableContentEntityBase
@@ -19,7 +20,7 @@ class RevisionableContentEntityBaseTest extends KernelTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = ['entity_test', 'system'];
+  public static $modules = ['entity_test', 'system', 'user'];
 
   /**
    * {@inheritdoc}
@@ -28,13 +29,33 @@ protected function setUp() {
     parent::setUp();
 
     $this->installEntitySchema('entity_test_revlog');
+    $this->installEntitySchema('user');
+    $this->installSchema('system', 'sequences');
   }
 
   public function testRevisionableContentEntity() {
+    $user = User::create(['name' => 'test name']);
+    $user->save();
+    /** @var \Drupal\entity_test\Entity\EntityTestWithRevisionLog $entity */
     $entity = EntityTestWithRevisionLog::create([
       'type' => 'entity_test_revlog',
     ]);
     $entity->save();
+
+    $entity->setNewRevision(TRUE);
+    $random_timestamp = rand(1e8, 2e8);
+    $entity->setRevisionCreationTime($random_timestamp);
+    $entity->setRevisionUserId($user->id());
+    $entity->setRevisionLogMessage('This is my log message');
+    $entity->save();
+
+    $revision_id = $entity->getRevisionId();
+
+    $entity = \Drupal::entityTypeManager()->getStorage('entity_test_revlog')->loadRevision($revision_id);
+    $this->assertEquals($random_timestamp, $entity->getRevisionCreationTime());
+    $this->assertEquals($user->id(), $entity->getRevisionUserId());
+    $this->assertEquals($user->id(), $entity->getRevisionUser()->id());
+    $this->assertEquals('This is my log message', $entity->getRevisionLogMessage());
   }