diff --git a/tests/ProjectStorageBackendTest.php b/tests/ProjectStorageBackendTest.php
index 93e670e..f9d9256 100644
--- a/tests/ProjectStorageBackendTest.php
+++ b/tests/ProjectStorageBackendTest.php
@@ -140,6 +140,8 @@ public function testProjectStorageAssignBackendFailedWithNonNumericBackendId():
 
         $this->client->deleteProject($project['id']);
         $this->client->purgeDeletedProject($project['id']);
+
+        $this->client->removeStorageBackend($backend['id']);
     }
 
     public function testStorageBackendRemove()