diff --git a/core/lib/Drupal/Core/Cache/PhpBackend.php b/core/lib/Drupal/Core/Cache/PhpBackend.php
index 8613859..d4554c5 100644
--- a/core/lib/Drupal/Core/Cache/PhpBackend.php
+++ b/core/lib/Drupal/Core/Cache/PhpBackend.php
@@ -165,7 +165,7 @@ public function deleteMultiple(array $cids) {
   public function deleteTags(array $tags) {
     $flat_tags = $this->flattenTags($tags);
     foreach ($this->storage()->listAll() as $cidhash) {
-      $item = $this->getByHash($cidhash);
+      $item = $this->getByHash($cidhash, TRUE);
       if (is_object($item) && array_intersect($flat_tags, $item->tags)) {
         $this->delete($item->cid);
       }
diff --git a/core/modules/system/src/Tests/Cache/GenericCacheBackendUnitTestBase.php b/core/modules/system/src/Tests/Cache/GenericCacheBackendUnitTestBase.php
index 050cf03..4515714 100644
--- a/core/modules/system/src/Tests/Cache/GenericCacheBackendUnitTestBase.php
+++ b/core/modules/system/src/Tests/Cache/GenericCacheBackendUnitTestBase.php
@@ -503,6 +503,13 @@ function testDeleteTags() {
     $this->assertFalse($this->getCacheBackend($bin)->get('test_cid_invalidate2', TRUE), 'Cache items matching tag were deleted.');
     // Test that the cache entry with without a matching tag still exists.
     $this->assertTrue($this->getCacheBackend($bin)->get('test_cid_invalidate1'), 'Cache items not matching tag were not invalidated.');
+
+    // Test that invalid items are deleted.
+    $backend->set('test_cid_invalidate1', $this->defaultValue, Cache::PERMANENT, array('test_tag' => array(1)));
+    $backend->invalidate('test_cid_invalidate1');
+    $this->assertTrue($backend->get('test_cid_invalidate1', TRUE), 'The invalid cache item exists before deleting.');
+    $backend->deleteTags(array('test_tag' => array(1)));
+    $this->assertFalse($backend->get('test_cid_invalidate1', TRUE), 'The invalid cache item was deleted.');
   }
 
   /**