diff --git a/test/test_gaunt.py b/test/test_gaunt.py
index e33f7b97920f2aa37b6b2fe7d42d22b8477baff6..07e62cb2ce92b203ad797f015037b193a680bf98 100644
--- a/test/test_gaunt.py
+++ b/test/test_gaunt.py
@@ -56,8 +56,10 @@ def test_sympy_gaunt_vs_wigner(lmkp):
 def test_python_vs_sympy_gaunt2(lmkp):
     L, M, K, P = lmkp
     sympy_result = sympy_matrix_element_G(L, M, K, P)
+    sympy_sign = sympy.sign(sympy_result)
     python_result, sign = gaunt._modified_gaunt_squared(L, K, P, M)
-    assert sign == sympy.sign(sympy_result)
+    if sympy_sign != 0:
+        assert sign == sympy_sign
     assert_sympy_equal(
         python_result,
         sympy_result ** 2,