diff --git a/py-polars/tests/unit/utils/test_deprecation.py b/py-polars/tests/unit/utils/test_deprecation.py
index e54f2b01eed19..99bf8e4f45e49 100644
--- a/py-polars/tests/unit/utils/test_deprecation.py
+++ b/py-polars/tests/unit/utils/test_deprecation.py
@@ -122,3 +122,5 @@ def rolling_test(by: str | None = None, closed: str = "left") -> None:
 
     # ... regardless of the value
     rolling_test(by="b", closed="right")
+
+    assert not recwarn