diff --git a/ProcessLib/RichardsFlow/Tests.cmake b/ProcessLib/RichardsFlow/Tests.cmake
index 5887ec1c09a5b5013ea0470c4fbf16639765f842..e8e9ba7de940979540f5868be78fb4e75968a50f 100644
--- a/ProcessLib/RichardsFlow/Tests.cmake
+++ b/ProcessLib/RichardsFlow/Tests.cmake
@@ -61,6 +61,19 @@ AddTest(
     # no longer be ambiguous.
 )
 
+# Comparison test for richards mechanics w/o deformations.
+AddTest(
+    NAME RichardsMechanics_RichardsFlow_2d_richardsflow
+    PATH RichardsMechanics
+    EXECUTABLE ogs
+    EXECUTABLE_ARGS RichardsFlow_2d_richardsflow.prj
+    WRAPPER time
+    TESTER vtkdiff
+    REQUIREMENTS NOT OGS_USE_MPI
+    DIFF_DATA
+    GLOB RichardsFlow_2d_richardsflow_pcs_0_ts_*.vtu pressure pressure 5e-11 1e-15
+    GLOB RichardsFlow_2d_richardsflow_pcs_0_ts_*.vtu saturation saturation 1e-14 1e-15
+)
 #PETSc/MPI
 AddTest(
     NAME 2D_RichardsFlow_h_us_quad_small_PID_adaptive_dt
@@ -74,3 +87,17 @@ AddTest(
     DIFF_DATA
     ref_t_1600.000000.vtu richards_pcs_0_ts_803_t_1600_000000_0.vtu pressure pressure 1e-8 1e-3
 )
+
+# Comparison test for richards mechanics w/o deformations.
+AddTest(
+    NAME Parallel_RichardsMechanics_RichardsFlow_2d_richardsflow
+    PATH RichardsMechanics
+    EXECUTABLE_ARGS RichardsFlow_2d_richardsflow.prj
+    WRAPPER mpirun
+    WRAPPER_ARGS -np 1
+    TESTER vtkdiff
+    REQUIREMENTS OGS_USE_MPI
+    DIFF_DATA
+    RichardsFlow_2d_richardsflow_pcs_0_ts_99_t_1900.000000.vtu RichardsFlow_2d_richardsflow_pcs_0_ts_99_t_1900_000000_0.vtu pressure pressure 5e-8 1e-10
+    RichardsFlow_2d_richardsflow_pcs_0_ts_99_t_1900.000000.vtu RichardsFlow_2d_richardsflow_pcs_0_ts_99_t_1900_000000_0.vtu saturation saturation 1e-10 1e-11
+)
diff --git a/ProcessLib/RichardsMechanics/Tests.cmake b/ProcessLib/RichardsMechanics/Tests.cmake
index 5a9888aba7a862e55f32822281bdd151760faa6b..63c0203bab7b651083f1085d21f4226f543857a8 100644
--- a/ProcessLib/RichardsMechanics/Tests.cmake
+++ b/ProcessLib/RichardsMechanics/Tests.cmake
@@ -170,18 +170,6 @@ AddTest(
     GLOB RichardsFlow_2d_quasinewton_pcs_0_ts_*.vtu HydraulicFlow HydraulicFlow 1e-15 0
     GLOB RichardsFlow_2d_quasinewton_pcs_0_ts_*.vtu NodalForces NodalForces 1e-15 0
 )
-AddTest(
-    NAME RichardsMechanics_RichardsFlow_2d_richardsflow
-    PATH RichardsMechanics
-    EXECUTABLE ogs
-    EXECUTABLE_ARGS RichardsFlow_2d_richardsflow.prj
-    WRAPPER time
-    TESTER vtkdiff
-    REQUIREMENTS NOT OGS_USE_MPI
-    DIFF_DATA
-    GLOB RichardsFlow_2d_richardsflow_pcs_0_ts_*.vtu pressure pressure 5e-11 1e-15
-    GLOB RichardsFlow_2d_richardsflow_pcs_0_ts_*.vtu saturation saturation 1e-14 1e-15
-)
 AddTest(
     NAME RichardsMechanics_deformation_dependent_porosity
     PATH RichardsMechanics
@@ -200,16 +188,3 @@ AddTest(
     GLOB deformation_dependent_porosity_pcs_0_ts_*.vtu porosity porosity 5e-14 1e-15
     GLOB deformation_dependent_porosity_pcs_0_ts_*.vtu porosity_avg porosity_avg 1e-14 1e-15
 )
-#PETSc
-AddTest(
-    NAME Parallel_RichardsMechanics_RichardsFlow_2d_richardsflow
-    PATH RichardsMechanics
-    EXECUTABLE_ARGS RichardsFlow_2d_richardsflow.prj
-    WRAPPER mpirun
-    WRAPPER_ARGS -np 1
-    TESTER vtkdiff
-    REQUIREMENTS OGS_USE_MPI
-    DIFF_DATA
-    RichardsFlow_2d_richardsflow_pcs_0_ts_99_t_1900.000000.vtu RichardsFlow_2d_richardsflow_pcs_0_ts_99_t_1900_000000_0.vtu pressure pressure 5e-8 1e-10
-    RichardsFlow_2d_richardsflow_pcs_0_ts_99_t_1900.000000.vtu RichardsFlow_2d_richardsflow_pcs_0_ts_99_t_1900_000000_0.vtu saturation saturation 1e-10 1e-11
-)