diff --git a/tests/series/test_agg.py b/tests/series/test_agg.py
index bd1d2ec21..2ed73502d 100644
--- a/tests/series/test_agg.py
+++ b/tests/series/test_agg.py
@@ -52,7 +52,9 @@ def test_agg_complex() -> None:
             np.exceptions.ComplexWarning,
             r"Casting complex values to real discards the imaginary part",
         ),
-        pytest_warns_bounded(RuntimeWarning, r"invalid value encountered in sqrt"),
+        pytest_warns_bounded(
+            RuntimeWarning, r"invalid value encountered in sqrt", upper="2.3.99"
+        ),
     ):
         check(assert_type(series.std(), np.float64), np.float64)