diff --git a/tests/functional/test_metrics.py b/tests/functional/test_metrics.py
index 98700f87c8b..9a8294749a7 100644
--- a/tests/functional/test_metrics.py
+++ b/tests/functional/test_metrics.py
@@ -552,6 +552,7 @@ def lambda_handler(evt, context):
 
     # THEN it should raise a warning instead of throwing an exception
     with warnings.catch_warnings(record=True) as w:
+        warnings.simplefilter("default")
         lambda_handler({}, {})
         assert len(w) == 1
         assert str(w[-1].message) == "No metrics to publish, skipping"