diff --git a/_package/tests/unit_tests/geometry_tests/multi_poly_intersector_pyt.py b/_package/tests/unit_tests/geometry_tests/multi_poly_intersector_pyt.py
index 8fe2fb49..4c3cadeb 100644
--- a/_package/tests/unit_tests/geometry_tests/multi_poly_intersector_pyt.py
+++ b/_package/tests/unit_tests/geometry_tests/multi_poly_intersector_pyt.py
@@ -21,8 +21,8 @@ def _run_test(self, x1, y1, x2, y2, points, polys, expected_poly_ids, expected_t
         """Runs the test."""
         mpi = grid.geometry.MultiPolyIntersector(points, polys)
         poly_ids, t_vals, pts = mpi.traverse_line_segment(x1, y1, x2, y2)
-        assert poly_ids == expected_poly_ids, str(f'Expected {expected_poly_ids}. Got {poly_ids}.')
-        assert np.testing.assert_allclose(t_vals, expected_t_vals), str(f'Expected {expected_t_vals}. Got {t_vals}.')
+        assert poly_ids == expected_poly_ids, f'Expected {expected_poly_ids}. Got {poly_ids}.'
+        assert np.testing.assert_allclose(t_vals, expected_t_vals), f'Expected {expected_t_vals}. Got {t_vals}.'
         for point, expected_point in zip(self._zeroed_z(pts), self._zeroed_z(expected_points)):
             assert np.testing.assert_allclose(point, expected_point)