diff --git a/core/tests/Drupal/Tests/Core/Session/PermissionsHashTest.php b/core/tests/Drupal/Tests/Core/Session/PermissionsHashTest.php
index 2bc202c..d760daa 100644
--- a/core/tests/Drupal/Tests/Core/Session/PermissionsHashTest.php
+++ b/core/tests/Drupal/Tests/Core/Session/PermissionsHashTest.php
@@ -112,7 +112,7 @@ protected function setUp() {
       ->disableOriginalConstructor()
       ->getMock();
 
-    $this->permissionsHash = new PermissionsHashGenerator($this->privateKey, $this->cache);
+    $this->permissionsHash = new PermissionsHashGenerator($this->privateKey, $this->cache, new \Drupal\Core\Cache\MemoryBackend('test'));
   }
 
   /**
@@ -130,9 +130,9 @@ public function testGenerate() {
   }
 
   /**
-   * Tests the generate method with cache returned.
+   * Tests the generate method with persistent cache returned.
    */
-  public function testGenerateCache() {
+  public function testGeneratePersistentCache() {
     // Set expectations for the mocked cache backend.
     $expected_cid = 'user_permissions_hash:administrator,authenticated';
 
@@ -150,6 +150,27 @@ public function testGenerateCache() {
   }
 
   /**
+   * Tests the generate method with static cache returned.
+   */
+  public function testGenerateStaticCache() {
+    // Set expectations for the mocked cache backend.
+    $expected_cid = 'user_permissions_hash:administrator,authenticated';
+
+    $mock_cache = new \stdClass();
+    $mock_cache->data = 'test_hash_here';
+
+    $this->permissionsHasn = new PermissionsHashGenerator($this->privateKey, new \Drupal\Core\Cache\MemoryBackend('test'), $this->cache);
+    $this->cache->expects($this->once())
+      ->method('get')
+      ->with($expected_cid)
+      ->will($this->returnValue($mock_cache));
+    $this->cache->expects($this->never())
+      ->method('set');
+
+    $this->permissionsHash->generate($this->account1);
+  }
+
+  /**
    * Tests the generate method with no cache returned.
    */
   public function testGenerateNoCache() {