diff -u b/core/modules/migrate/src/MigrateExecutable.php b/core/modules/migrate/src/MigrateExecutable.php
--- b/core/modules/migrate/src/MigrateExecutable.php
+++ b/core/modules/migrate/src/MigrateExecutable.php
@@ -19,6 +19,7 @@
  * Defines a migrate executable class.
  */
 class MigrateExecutable implements MigrateExecutableInterface {
+
   use StringTranslationTrait;
 
   /**
@@ -93,6 +94,8 @@
    *   (optional) The event dispatcher.
    * @param \Drupal\Migrate\MemoryManagerInterface $memory_manager
    *   (optional) The memory manager.
+   *
+   * @throws \Drupal\migrate\MigrateException
    */
   public function __construct(MigrationInterface $migration, MigrateMessageInterface $message = NULL, EventDispatcherInterface $event_dispatcher = NULL, MemoryManagerInterface $memory_manager = NULL) {
     $this->migration = $migration;
@@ -454,10 +457,9 @@
    * Checks for exceptional conditions, and display feedback.
    */
   protected function checkStatus() {
-    if (!$this->getMemoryManager()->ensureMemory()) {
-      return MigrationInterface::RESULT_INCOMPLETE;
-    }
-    return MigrationInterface::RESULT_COMPLETED;
+    return $this->getMemoryManager()->ensureMemory()
+      ? MigrationInterface::RESULT_COMPLETED
+      : MigrationInterface::RESULT_INCOMPLETE;
   }
 
 }
diff -u b/core/modules/migrate/tests/src/Unit/MigrateExecutableTest.php b/core/modules/migrate/tests/src/Unit/MigrateExecutableTest.php
--- b/core/modules/migrate/tests/src/Unit/MigrateExecutableTest.php
+++ b/core/modules/migrate/tests/src/Unit/MigrateExecutableTest.php
@@ -495,17 +495,4 @@
 
   /**
-   * Tests the checkStatus method.
-   */
-  public function testCheckStatus() {
-    $this->memoryManager->expects($this->any())
-      ->method('ensureMemory')
-      ->will($this->onConsecutiveCalls(TRUE, FALSE));
-    $result = $this->executable->checkStatus();
-    $this->assertEquals($result, MigrationInterface::RESULT_COMPLETED);
-    $result = $this->executable->checkStatus();
-    $this->assertEquals($result, MigrationInterface::RESULT_INCOMPLETE);
-  }
-
-  /**
    * Returns a mock migration source instance.
    *
diff -u b/core/modules/migrate/tests/src/Unit/TestMigrateExecutable.php b/core/modules/migrate/tests/src/Unit/TestMigrateExecutable.php
--- b/core/modules/migrate/tests/src/Unit/TestMigrateExecutable.php
+++ b/core/modules/migrate/tests/src/Unit/TestMigrateExecutable.php
@@ -53,22 +53,2 @@
 
-  /**
-   * {@inheritdoc}
-   */
-  protected function formatSize($size) {
-    return $size;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getMemoryManager() {
-    return parent::getMemoryManager();
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function checkStatus() {
-    return parent::checkStatus();
-  }
 }