13a14,38
> diff --git a/core/tests/Drupal/Tests/Core/Cache/BackendChainImplementationUnitTest.php b/core/tests/Drupal/Tests/Core/Cache/BackendChainImplementationUnitTest.php
> index 300a926..951e025 100644
> --- a/core/tests/Drupal/Tests/Core/Cache/BackendChainImplementationUnitTest.php
> +++ b/core/tests/Drupal/Tests/Core/Cache/BackendChainImplementationUnitTest.php
> @@ -93,6 +93,20 @@ public function setUp() {
>    }
>  
>    /**
> +   * Test removal of all backends in chain.
> +   */
> +  public function testRemoveBin(){
> +    $cached = $this->chain->get('t123');
> +    $this->assertNotSame(FALSE, $cached, 'Got key that is on all backends');
> +    
> +    $this->chain->removeBin();
> +    
> +    $cached = $this->chain->get('t123');
> +    $this->assertSame(FALSE, $cached, 'No backend responds once all removed..');
> +     
> +  }
> +  
> +  /**
>     * Test the get feature.
>     */
>    public function testGet() {