diff --git a/tests/test_csm.py b/tests/test_csm.py
index 4625588fab37b31c50d23254af40b6d16b4c7b5c..c66d961613da0c386651a65e4a269c98d50a00e2 100644
--- a/tests/test_csm.py
+++ b/tests/test_csm.py
@@ -6,13 +6,6 @@ from plio.io.io_gdal import GeoDataset
 import csmapi
 from knoten import csm
 
-@pytest.fixture
-def mock_dem():
-    mock_dem = mock.MagicMock(spec_set=GeoDataset)
-    mock_dem.read_array.return_value = 100
-    mock_dem.latlon_to_pixel.return_value = (0.5,0.5)
-    return mock_dem
-
 @pytest.fixture
 def mock_sensor():
     mock_sensor = mock.MagicMock(spec=csmapi.RasterGM)