diff --git a/tests/ops/qubit/test_observables.py b/tests/ops/qubit/test_observables.py
index 51c8996bb6f..30481460102 100644
--- a/tests/ops/qubit/test_observables.py
+++ b/tests/ops/qubit/test_observables.py
@@ -369,8 +369,8 @@ def test_hermitian_decomposition(self, observable):
         )
         A_decomp = qml.Hermitian(observable, wires=list(range(num_wires))).decomposition()
 
-        assert np.allclose(A_decomp_static[0].matrix(), observable, rtol=0)
-        assert np.allclose(A_decomp[0].matrix(), observable, rtol=0)
+        assert np.allclose(qml.matrix(A_decomp_static[0]), observable, rtol=0)
+        assert np.allclose(qml.matrix(A_decomp[0]), observable, rtol=0)
 
     @pytest.mark.parametrize("observable, eigvals, eigvecs", EIGVALS_TEST_DATA)
     def test_hermitian_diagonalizing_gates(self, observable, eigvals, eigvecs, tol, mocker):