diff --git a/GPy/testing/link_function_tests.py b/GPy/testing/link_function_tests.py
index 2f8fc5a8..9f41f736 100644
--- a/GPy/testing/link_function_tests.py
+++ b/GPy/testing/link_function_tests.py
@@ -97,13 +97,13 @@ class LinkFunctionTests(np.testing.TestCase):
         #Check the clipping works
         np.testing.assert_almost_equal(link.transf(self.f_lower_lim), 0, decimal=5)
         #Need to look at most significant figures here rather than the decimals
-        np.testing.assert_approx_equal(link.transf(self.f_upper_lim), np.log1p(_lim_val), significant=5)
+        np.testing.assert_approx_equal(link.transf(self.f_upper_lim), scipy.special.log1p(_lim_val), significant=5)
         self.check_overflow(link, lim_of_inf)
 
         #Check that it would otherwise fail
         beyond_lim_of_inf = lim_of_inf + 10.0
         old_err_state = np.seterr(over='ignore')
-        self.assertTrue(np.isinf(np.log1p(np.exp(beyond_lim_of_inf))))
+        self.assertTrue(np.isinf(scipy.special.log1p(np.exp(beyond_lim_of_inf))))
         np.seterr(**old_err_state)