diff --git a/Code/Mantid/scripts/test/ConvertToWavelengthTest.py b/Code/Mantid/scripts/test/ConvertToWavelengthTest.py
index 71044bbf9745..5bac2b2fceab 100644
--- a/Code/Mantid/scripts/test/ConvertToWavelengthTest.py
+++ b/Code/Mantid/scripts/test/ConvertToWavelengthTest.py
@@ -113,8 +113,8 @@ def test_convert(self):
         self.assertEqual("Wavelength", monitor_ws.getAxis(0).getUnit().unitID())
         x_min, x_max = ConvertToWavelengthTest.cropped_x_range(detector_ws, 0)
         
-        self.assertGreaterEqual(x_min, 0.0)
-        self.assertLessEqual(x_max, 10.0)
+        self.assertTrue(x_min >= 0.0)
+        self.assertTrue(x_max <= 10.0)
 
 if __name__ == '__main__':
     unittest.main()
\ No newline at end of file