diff --git a/glance/tests/unit/async_/flows/test_web_download.py b/glance/tests/unit/async_/flows/test_web_download.py
index cccbf5fca..eec809fe1 100644
--- a/glance/tests/unit/async_/flows/test_web_download.py
+++ b/glance/tests/unit/async_/flows/test_web_download.py
@@ -178,12 +178,29 @@ class TestWebDownloadTask(test_utils.BaseTestCase):
             self.assertEqual(1, mock_unlik.call_count)

     @mock.patch("glance.async_.flows._internal_plugins.web_download.store_api")
-    def test_web_download_revert_without_failure(self, mock_store_api):
+    @mock.patch("glance.common.scripts.utils.get_image_data_iter")
+    def test_web_download_revert_without_failure(self, mock_data,
+                                                 mock_store_api):
         web_download_task = web_download._WebDownload(
             self.task.task_id, self.task_type, self.task_repo,
             self.image_id, self.uri)
-        web_download_task._path = "/path/to_downloaded_data"
-        web_download_task.revert("/path/to_downloaded_data")
+
+        with mock.patch.object(web_download_task, 'store') as mock_store:
+            # Data iterator reports content-length header of 456
+            mock_data.return_value.headers = {'content-length': 456}
+
+            # Store returns only 123 bytes read
+            mock_store.add.return_value = "/path/to_downloaded_data", 123
+
+            # task.execute() should fail because of the mismatch
+            self.assertRaises(glance.common.exception.ImportTaskError,
+                              web_download_task.execute)
+
+        # Call task.revert() like taskflow will
+        web_download_task.revert(None)
+
+        # Make sure we delete from store with the path that the store
+        # add call returned
         mock_store_api.delete_from_backend.assert_called_once_with(
             "/path/to_downloaded_data")