diff --git a/plugins/Math/test.py b/plugins/Math/test.py
index d28b509f7..9c22e30d3 100644
--- a/plugins/Math/test.py
+++ b/plugins/Math/test.py
@@ -98,10 +98,12 @@ class MathTestCase(PluginTestCase):
     def testCalc(self):
         self.assertResponse('calc 5*0.06', str(5*0.06))
         self.assertResponse('calc 2.0-7.0', str(2-7))
-        self.assertResponse('calc (-1)**.5', 'i')
         self.assertResponse('calc e**(i*pi)+1', '0')
-        self.assertRegexp('calc (-5)**.5', '2.236067977[0-9]+i')
-        self.assertRegexp('calc -((-5)**.5)', '-2.236067977[0-9]+i')
+        if sys.version_info[0] >= 3:
+            # Python 2 has bad handling of exponentiation of negative numbers
+            self.assertResponse('calc (-1)**.5', 'i')
+            self.assertRegexp('calc (-5)**.5', '2.236067977[0-9]+i')
+            self.assertRegexp('calc -((-5)**.5)', '-2.236067977[0-9]+i')
         self.assertNotRegexp('calc [9, 5] + [9, 10]', 'TypeError')
         self.assertError('calc [9, 5] + [9, 10]')
         self.assertNotError('calc degrees(2)')