diff --git a/tests/functional/object/mcg/test_noobaa_prometheus.py b/tests/functional/object/mcg/test_noobaa_prometheus.py
index 2b988c1e0a9..4676c345937 100644
--- a/tests/functional/object/mcg/test_noobaa_prometheus.py
+++ b/tests/functional/object/mcg/test_noobaa_prometheus.py
@@ -29,7 +29,7 @@ def get_bucket_used_bytes_metric(bucket_name, threading_lock):
     )
     if len(response.get("data").get("result")) == 0:
         raise ReturnedEmptyResponseException
-    elif response.get("data").get("result")[0].get("value")[1] == 0:
+    elif response.get("data").get("result")[0].get("value")[1] == '0':
         raise ReturnedEmptyResponseException
     else:
         value = response.get("data").get("result")[0].get("value")