diff --git a/python/test/grid_provider_cube.py b/python/test/grid_provider_cube.py
index abe767a3b93d7a484c25c5c6b44de30bb026d01e..561da4c434b1f538775af042793a96e8adcfabc6 100644
--- a/python/test/grid_provider_cube.py
+++ b/python/test/grid_provider_cube.py
@@ -19,7 +19,9 @@ from dune.xt.grid import Dim, Cube, Simplex, make_cube_grid
 init_args = (
     (Dim(1), [0], [1], [2]),
     (Dim(2), Cube(), [0, 0], [1, 1], [2, 2]),
+    (Dim(2), Simplex(), [0, 0], [1, 1], [2, 2]),
     (Dim(3), Cube(), [0, 0, 0], [1, 1, 1], [2, 2, 2]),
+    (Dim(3), Simplex(), [0, 0, 0], [1, 1, 1], [2, 2, 2]),
 )