diff --git a/tests/retrieve/test_qpe.py b/tests/retrieve/test_qpe.py
index a4741dca7f..d42e15183d 100644
--- a/tests/retrieve/test_qpe.py
+++ b/tests/retrieve/test_qpe.py
@@ -174,7 +174,8 @@ def test_precip_rate():
                         / 300
                     )
                     ** (1 / 1.4)
-                )
+                ),
+                dtype="float64",
             )
         )
         < -4