diff --git a/backend/workflow_manager/workflow_v2/constants.py b/backend/workflow_manager/workflow_v2/constants.py
index 91a9984f0..29d400ffe 100644
--- a/backend/workflow_manager/workflow_v2/constants.py
+++ b/backend/workflow_manager/workflow_v2/constants.py
@@ -63,4 +63,4 @@ class WorkflowMessages:
 class ResultKeys:
     METADATA = "metadata"
     CONFIDENCE_DATA = "confidence_data"
-    OUTPUT = 'output'
+    OUTPUT = "output"