diff --git a/keras/src/testing/test_case.py b/keras/src/testing/test_case.py
index d5a8f7d779f..0d930f46dc4 100644
--- a/keras/src/testing/test_case.py
+++ b/keras/src/testing/test_case.py
@@ -43,7 +43,7 @@ def assertAllClose(self, x1, x2, atol=1e-6, rtol=1e-6, msg=None):
             x1 = backend.convert_to_numpy(x1)
         if not isinstance(x2, np.ndarray):
             x2 = backend.convert_to_numpy(x2)
-        np.testing.assert_allclose(x1, x2, atol=atol, rtol=rtol)
+        np.testing.assert_allclose(x1, x2, atol=atol, rtol=rtol, err_msg=msg)
 
     def assertNotAllClose(self, x1, x2, atol=1e-6, rtol=1e-6, msg=None):
         try:
@@ -62,7 +62,7 @@ def assertAlmostEqual(self, x1, x2, decimal=3, msg=None):
             x1 = backend.convert_to_numpy(x1)
         if not isinstance(x2, np.ndarray):
             x2 = backend.convert_to_numpy(x2)
-        np.testing.assert_almost_equal(x1, x2, decimal=decimal)
+        np.testing.assert_almost_equal(x1, x2, decimal=decimal, err_msg=msg)
 
     def assertAllEqual(self, x1, x2, msg=None):
         self.assertEqual(len(x1), len(x2), msg=msg)