diff --git a/ProcessLib/SmallDeformation/Tests.cmake b/ProcessLib/SmallDeformation/Tests.cmake
index ea09df330bddb5fba1b98129f080e10d00c6e49c..39c84132b0f82e627319f9082b6cd869bd76742d 100644
--- a/ProcessLib/SmallDeformation/Tests.cmake
+++ b/ProcessLib/SmallDeformation/Tests.cmake
@@ -241,3 +241,5 @@ AddTest(
     arehs-salt-M_gravity_only_ts_10_t_31535999999.999996.vtu arehs-salt-M_gravity_only_ts_10_t_31535999999.999996.vtu displacement displacement 1.e-10 1.e-10
     arehs-salt-M_gravity_only_ts_10_t_31535999999.999996.vtu arehs-salt-M_gravity_only_ts_10_t_31535999999.999996.vtu sigma sigma 1.e-9 5.e-7
 )
+
+NotebookTest(NOTEBOOKFILE Notebooks/SimpleMechanics.ipynb RUNTIME 10)
diff --git a/ProcessLib/SteadyStateDiffusion/Tests.cmake b/ProcessLib/SteadyStateDiffusion/Tests.cmake
index 604440008d2a4b9f59f0023793fe5fc9f9082eb5..c7c7c6de2f6fe13871f7db467340b8057f1904c1 100644
--- a/ProcessLib/SteadyStateDiffusion/Tests.cmake
+++ b/ProcessLib/SteadyStateDiffusion/Tests.cmake
@@ -903,6 +903,8 @@ AddTest(
     square_1x1_quad_1e2.vtu square_1e2_GMRES_ts_1_t_1.000000.vtu Linear_1_to_minus1 pressure 1e-14 1e-14
 )
 
-if (NOT OGS_USE_MPI)
+if(OGS_USE_MPI)
+    NotebookTest(NOTEBOOKFILE Notebooks/SimplePETSc.ipynb RUNTIME 10)
+else()
     OgsTest(PROJECTFILE "Elliptic/cube_1x1x1_SteadyStateDiffusion/cube_1e4_anisotropic.prj")
 endif() # OGS_USE_MPI