diff --git a/tests/test_utils.py b/tests/test_utils.py
index ba70ad382..95e3f1b2c 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -3,7 +3,7 @@
 
 def test_math_numba_defaults():
     assert pgu.numba_math_defaults_kwargs.fastmath
-    assert pgu.numba_math_defaults_kwargs.parallel
+    assert not pgu.numba_math_defaults_kwargs.parallel
 
     pgu.numba_math_defaults.fastmath = False
-    assert ~pgu.numba_math_defaults.fastmath
+    assert not pgu.numba_math_defaults.fastmath