diff --git a/core/tests/Drupal/Tests/Core/Lock/LockBackendAbstractTest.php b/core/tests/Drupal/Tests/Core/Lock/LockBackendAbstractTest.php
new file mode 100644
index 0000000..933f8b5
--- /dev/null
+++ b/core/tests/Drupal/Tests/Core/Lock/LockBackendAbstractTest.php
@@ -0,0 +1,77 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Tests\Core\Lock\LockBackendAbstractTest.
+ */
+
+namespace Drupal\Tests\Core\Lock;
+
+use Drupal\Tests\UnitTestCase;
+
+/**
+ * Tests the LockBackendAbstract class.
+ *
+ * @group Drupal
+ * @group Lock
+ *
+ * @see \Drupal\Tests\Core\Lock\LockBackendAbstractTest
+ */
+class LockBackendAbstractTest extends UnitTestCase {
+
+  /**
+   * The Mocked LockBackendAbstract object.
+   *
+   * @var \Drupal\Core\Lock\LockBackendAbstract|\PHPUnit_Framework_MockObject_MockObject
+   */
+  protected $lock;
+
+  public static function getInfo() {
+    return array(
+      'name' => 'LockBackendAbstract test',
+      'description' => 'Test the LockBackendAbstract class.',
+      'group' => 'Lock',
+    );
+  }
+
+  public function setUp() {
+    $this->lock = $this->getMockForAbstractClass('Drupal\Core\Lock\LockBackendAbstract');
+  }
+
+  /**
+   * Tests the wait() method when lockMayBeAvailable() returns TRUE.
+   */
+  public function testWaitFalse() {
+    $this->lock->expects($this->any())
+      ->method('lockMayBeAvailable')
+      ->with($this->equalTo('test_name'))
+      ->will($this->returnValue(TRUE));
+
+    $this->assertFalse($this->lock->wait('test_name'));
+  }
+
+  /**
+   * Tests the wait() method when lockMayBeAvailable() returns FALSE.
+   */
+  public function testWaitTrue() {
+    $this->lock->expects($this->any())
+      ->method('lockMayBeAvailable')
+      ->with($this->equalTo('test_name'))
+      ->will($this->returnValue(FALSE));
+
+    $this->assertTrue($this->lock->wait('test_name', 1));
+  }
+
+  /**
+   * Test the getLockId() method.
+   */
+  public function testGetLockId() {
+    $lock_id = $this->lock->getLockId();
+    $this->assertInternalType('string', $lock_id);
+    // Example lock ID would be '7213141505232b6ee2cb967.27683891'.
+    $this->assertRegExp('/[\da-f]+\.\d+/', $lock_id);
+    // Test the same lock ID is returned a second time.
+    $this->assertSame($lock_id, $this->lock->getLockId());
+  }
+
+}