diff --git a/Applications/Utils/Tests.cmake b/Applications/Utils/Tests.cmake
index 208376de95491c8829a2f6b428f52e3b732fc579..e4509187dbf303131b6b7f2072f949b1b0a8153a 100644
--- a/Applications/Utils/Tests.cmake
+++ b/Applications/Utils/Tests.cmake
@@ -1495,10 +1495,10 @@ AddTest(
                     --add-layer-on-bottom
                     -t 10
                     --set-material-id 10
-                    -o ${Data_BINARY_DIR}/<PATH>/SmallTest_WithAdditionalBottomLayer.vtu
+                    -o ${Data_BINARY_DIR}/<PATH>/SmallTest_WithAdditionalBottomLayer_id.vtu
     REQUIREMENTS NOT (OGS_USE_MPI)
     TESTER vtkdiff-mesh
-    DIFF_DATA SmallTest_WithAdditionalBottomLayer.vtu SmallTest_WithAdditionalBottomLayer.vtu 1.e-16
+    DIFF_DATA SmallTest_WithAdditionalBottomLayer.vtu SmallTest_WithAdditionalBottomLayer_id.vtu 1.e-16
 )
 
 AddTest( # with option --copy-material_ids instead of --set-material-id
@@ -1510,10 +1510,10 @@ AddTest( # with option --copy-material_ids instead of --set-material-id
                     --add-layer-on-bottom
                     -t 10
                     --copy-material-ids
-                    -o ${Data_BINARY_DIR}/<PATH>/SmallTest_WithAdditionalBottomLayer.vtu
+                    -o ${Data_BINARY_DIR}/<PATH>/SmallTest_WithAdditionalBottomLayer_copy.vtu
     REQUIREMENTS NOT (OGS_USE_MPI)
     TESTER vtkdiff-mesh
-    DIFF_DATA SmallTest_WithAdditionalBottomLayer.vtu SmallTest_WithAdditionalBottomLayer.vtu 1.e-16
+    DIFF_DATA SmallTest_WithAdditionalBottomLayer.vtu SmallTest_WithAdditionalBottomLayer_copy.vtu 1.e-16
 )
 
 AddTest( # without options --copy-material_ids and --set-material-id
@@ -1524,10 +1524,10 @@ AddTest( # without options --copy-material_ids and --set-material-id
     EXECUTABLE_ARGS -i SmallTest.vtu
                     --add-layer-on-bottom
                     -t 10
-                    -o ${Data_BINARY_DIR}/<PATH>/SmallTest_WithAdditionalBottomLayer.vtu
+                    -o ${Data_BINARY_DIR}/<PATH>/SmallTest_WithAdditionalBottomLayer_no_opt.vtu
     REQUIREMENTS NOT (OGS_USE_MPI)
     TESTER vtkdiff-mesh
-    DIFF_DATA SmallTest_WithAdditionalBottomLayer.vtu SmallTest_WithAdditionalBottomLayer.vtu 1.e-16
+    DIFF_DATA SmallTest_WithAdditionalBottomLayer.vtu SmallTest_WithAdditionalBottomLayer_no_opt.vtu 1.e-16
 )
 AddTest( # with options --copy-material_ids and --set-material-id 10 should fail
     NAME AddLayer_test_set-material-id_and_copy-material-ids_failing
@@ -1539,7 +1539,7 @@ AddTest( # with options --copy-material_ids and --set-material-id 10 should fail
                     -t 10
                     --set-material-id 10
                     --copy-material-ids
-                    -o ${Data_BINARY_DIR}/<PATH>/SmallTest_WithAdditionalBottomLayer.vtu
+                    -o ${Data_BINARY_DIR}/<PATH>/SmallTest_WithAdditionalBottomLayer_failing.vtu
     REQUIREMENTS NOT (OGS_USE_MPI)
     PROPERTIES
     PASS_REGULAR_EXPRESSION "It is not possible to set both options"