diff --git a/python/gtsam/tests/test_Rot3.py b/python/gtsam/tests/test_Rot3.py
index d22182433..90c80ab31 100644
--- a/python/gtsam/tests/test_Rot3.py
+++ b/python/gtsam/tests/test_Rot3.py
@@ -34,7 +34,7 @@ class TestRot3(GtsamTestCase):
         # get back angle in radians
         _, actual_angle = Rot3(R).axisAngle()
         expected_angle = 3.1396582
-        self.gtsamAssertEquals(actual_angle, expected_angle, 1e-7)
+        np.testing.assert_almost_equal(actual_angle, expected_angle, 1e-7)
 
 
 if __name__ == "__main__":