diff --git a/python/tests/reference/Result/12grains6x7x8.geom b/python/tests/reference/Result/12grains6x7x8.geom
deleted file mode 100644
index 4e6836bb8..000000000
--- a/python/tests/reference/Result/12grains6x7x8.geom
+++ /dev/null
@@ -1,61 +0,0 @@
-4 header
-grid a 6 b 7 c 8
-size x 0.75 y 0.875 z 1.0
-origin x 0.0 y 0.0 z 0.0
-homogenization 1
- 9 3 3 10 9 9
- 9 1 1 1 9 9
- 9 11 1 1 7 9
- 7 11 11 7 7 7
- 7 11 11 7 7 7
-12 3 3 10 7 12
-12 3 3 10 10 12
-12 3 3 1 9 9
- 9 1 1 1 9 9
- 9 1 1 1 7 7
- 7 1 1 7 7 7
-12 12 3 7 7 7
-12 3 3 3 12 12
-12 3 3 3 12 12
-12 3 3 1 1 12
- 9 1 1 1 1 9
- 6 1 1 1 8 8
- 7 6 8 8 8 8
-12 12 8 8 8 12
-12 3 3 3 12 12
-12 3 3 3 12 12
- 5 6 6 6 1 12
- 6 6 6 6 8 8
- 6 6 6 8 8 8
- 8 6 8 8 8 8
-12 5 8 8 8 8
-12 5 5 8 8 12
- 5 5 5 3 12 12
- 5 5 6 6 6 5
- 6 6 6 6 6 6
- 6 6 6 6 8 8
- 4 4 6 8 8 8
- 4 4 2 2 2 8
- 5 5 5 2 2 2
- 5 5 5 5 2 5
- 5 5 5 10 10 5
- 6 6 6 6 10 4
- 4 4 11 11 2 4
- 4 4 11 2 2 4
- 4 4 2 2 2 2
- 5 5 5 2 2 2
- 5 5 5 10 10 5
- 5 5 10 10 10 9
- 4 11 11 11 10 9
- 4 4 11 11 11 4
- 4 4 11 11 2 4
- 4 4 2 2 2 2
- 5 5 2 2 2 2
- 5 5 10 10 10 10
- 9 10 10 10 10 9
- 9 11 11 10 9 9
- 4 11 11 11 9 9
- 4 11 11 11 7 7
- 4 4 11 2 7 7
-12 10 10 10 10 7
- 9 10 10 10 10 9
diff --git a/python/tests/reference/Result/12grains6x7x8.vtr b/python/tests/reference/Result/12grains6x7x8.vtr
new file mode 100644
index 000000000..02ba9d4e6
--- /dev/null
+++ b/python/tests/reference/Result/12grains6x7x8.vtr
@@ -0,0 +1,30 @@
+
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diff --git a/python/tests/reference/Result/6grains6x7x8_single_phase.geom b/python/tests/reference/Result/6grains6x7x8_single_phase.geom
deleted file mode 100644
index 14cae0973..000000000
--- a/python/tests/reference/Result/6grains6x7x8_single_phase.geom
+++ /dev/null
@@ -1,61 +0,0 @@
-4 header
-grid a 6 b 7 c 8
-size x 0.75 y 0.875 z 1.0
-origin x 0.0 y 0.0 z 0.0
-homogenization 1
-3 3 3 4 3 3
-3 1 1 1 3 3
-3 5 1 1 1 3
-1 5 5 1 1 1
-1 5 5 1 1 1
-6 3 3 4 1 6
-6 3 3 4 4 6
-6 3 3 1 3 3
-3 1 1 1 3 3
-3 1 1 1 1 1
-1 1 1 1 1 1
-6 6 3 1 1 1
-6 3 3 3 6 6
-6 3 3 3 6 6
-6 3 3 1 1 6
-3 1 1 1 1 3
-6 1 1 1 2 2
-1 6 2 2 2 2
-6 6 2 2 2 6
-6 3 3 3 6 6
-6 3 3 3 6 6
-5 6 6 6 1 6
-6 6 6 6 2 2
-6 6 6 2 2 2
-2 6 2 2 2 2
-6 5 2 2 2 2
-6 5 5 2 2 6
-5 5 5 3 6 6
-5 5 6 6 6 5
-6 6 6 6 6 6
-6 6 6 6 2 2
-4 4 6 2 2 2
-4 4 2 2 2 2
-5 5 5 2 2 2
-5 5 5 5 2 5
-5 5 5 4 4 5
-6 6 6 6 4 4
-4 4 5 5 2 4
-4 4 5 2 2 4
-4 4 2 2 2 2
-5 5 5 2 2 2
-5 5 5 4 4 5
-5 5 4 4 4 3
-4 5 5 5 4 3
-4 4 5 5 5 4
-4 4 5 5 2 4
-4 4 2 2 2 2
-5 5 2 2 2 2
-5 5 4 4 4 4
-3 4 4 4 4 3
-3 5 5 4 3 3
-4 5 5 5 3 3
-4 5 5 5 1 1
-4 4 5 2 1 1
-6 4 4 4 4 1
-3 4 4 4 4 3
diff --git a/python/tests/reference/Result/6grains6x7x8_single_phase.vtr b/python/tests/reference/Result/6grains6x7x8_single_phase.vtr
new file mode 100644
index 000000000..9a7b7dd7d
--- /dev/null
+++ b/python/tests/reference/Result/6grains6x7x8_single_phase.vtr
@@ -0,0 +1,30 @@
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+ AQAAAACAAAA4AAAAHAAAAA==eF5jYEAGB+wh9AUofQNKP4DST6D0C3sAisIGjw==
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diff --git a/python/tests/test_Result.py b/python/tests/test_Result.py
index 68b72badf..5ef17cd26 100644
--- a/python/tests/test_Result.py
+++ b/python/tests/test_Result.py
@@ -341,6 +341,11 @@ class TestResult:
os.chdir(tmp_path)
default.save_vtk(output)
+ @pytest.mark.parametrize('mode',['point','cell'])
+ def test_vtk_mode(self,tmp_path,single_phase,mode):
+ os.chdir(tmp_path)
+ single_phase.save_vtk(mode=mode)
+
def test_XDMF(self,tmp_path,single_phase):
os.chdir(tmp_path)
single_phase.save_XDMF()