diff --git a/CMakeLists.txt b/CMakeLists.txt
index 63d265dc27a..2ba12779790 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -221,6 +221,7 @@ include(UnityBuildSettings)
 
 if(OGS_USE_PIP)
     setup_venv()
+    setup_venv_dependent_ctests()
 endif()
 
 message(STATUS "${_benchmark_run_commands}")
diff --git a/ProcessLib/HT/Tests.cmake b/ProcessLib/HT/Tests.cmake
index e93012552e9..924e6a12181 100644
--- a/ProcessLib/HT/Tests.cmake
+++ b/ProcessLib/HT/Tests.cmake
@@ -357,23 +357,7 @@ AddTest(
     ThermalConvection_ts_1_t_0.000000_expected.vtu ThermalConvection_ts_1_t_0.000000.vtu darcy_velocity darcy_velocity 1e-8 1e-13
 )
 
-if(NOT OGS_USE_MPI AND OGS_BUILD_TESTING AND OGS_USE_PIP)
-    execute_process(COMMAND ${Python_EXECUTABLE}
-            ${Data_SOURCE_DIR}/Parabolic/HT/InvalidProjectFiles/generateInvalidMediaForHT.py
-        WORKING_DIRECTORY ${Data_SOURCE_DIR}/Parabolic/HT/InvalidProjectFiles)
-    file(GLOB HT_INVALID_PRJ_FILES ${Data_SOURCE_DIR}/Parabolic/HT/InvalidProjectFiles/*.prj)
-    foreach(ht_invalid_prj_file ${HT_INVALID_PRJ_FILES})
-        string(REPLACE ${Data_SOURCE_DIR}/Parabolic/HT/InvalidProjectFiles/HT "invalid" ht_invalid_prj_file_short ${ht_invalid_prj_file})
-        AddTest(
-            NAME HT_${ht_invalid_prj_file_short}
-            PATH Parabolic/HT/InvalidProjectFiles
-            EXECUTABLE ogs
-            EXECUTABLE_ARGS ${ht_invalid_prj_file}
-            RUNTIME 1
-        )
-        set_tests_properties(ogs-HT_${ht_invalid_prj_file_short} PROPERTIES WILL_FAIL TRUE)
-    endforeach()
-endif()
+# generateInvalidMediaForHT.py logic moved to PythonSetup.cmake
 
 if (NOT (OGS_USE_MPI))
     OgsTest(PROJECTFILE Parabolic/HT/SimpleSynthetics/deactivated_subdomain/HT_DeactivatedSubdomain.prj)
diff --git a/scripts/cmake/PythonSetup.cmake b/scripts/cmake/PythonSetup.cmake
index 1c6f02f0abd..bed4a71692f 100644
--- a/scripts/cmake/PythonSetup.cmake
+++ b/scripts/cmake/PythonSetup.cmake
@@ -8,8 +8,7 @@ if(OGS_USE_PIP)
         execute_process(
             COMMAND
                 ${CMAKE_COMMAND} -DPROJECT_BINARY_DIR=${PROJECT_BINARY_DIR}
-                -Dpython_version=${ogs.minimum_version.python}
-                -P
+                -Dpython_version=${ogs.minimum_version.python} -P
                 ${PROJECT_SOURCE_DIR}/scripts/cmake/PythonCreateVirtualEnv.cmake
             WORKING_DIRECTORY ${PROJECT_BINARY_DIR} COMMAND_ECHO STDOUT
                               ECHO_OUTPUT_VARIABLE ECHO_ERROR_VARIABLE
@@ -65,8 +64,8 @@ if(NOT OGS_BUILD_WHEEL)
 endif()
 
 find_package(
-    Python ${ogs.minimum_version.python}
-    COMPONENTS ${_python_componets} REQUIRED
+    Python ${ogs.minimum_version.python} COMPONENTS ${_python_componets}
+    REQUIRED
 )
 
 if(OGS_USE_PIP)
@@ -93,10 +92,12 @@ if(OGS_USE_PIP)
         file(STRINGS Tests/Data/requirements-dev.txt _requirements_dev)
         list(APPEND OGS_PYTHON_PACKAGES ${_requirements} ${_requirements_dev})
 
-        list(APPEND OGS_PYTHON_PACKAGES
-             "snakemake==${ogs.minimum_version.snakemake}"
-             "pulp==2.7.0" # https://github.com/snakemake/snakemake/issues/2607
-             "setuptools"  # https://github.com/glenfant/stopit/issues/32
+        list(
+            APPEND
+            OGS_PYTHON_PACKAGES
+            "snakemake==${ogs.minimum_version.snakemake}"
+            "pulp==2.7.0" # https://github.com/snakemake/snakemake/issues/2607
+            "setuptools" # https://github.com/glenfant/stopit/issues/32
         )
         set(SNAKEMAKE ${LOCAL_VIRTUALENV_BIN_DIR}/snakemake CACHE FILEPATH ""
                                                                   FORCE
@@ -147,9 +148,10 @@ function(setup_venv)
         )
         if(DEFINED ENV{CI} AND UNIX AND NOT APPLE)
             execute_process(
-                COMMAND ${_apple_env} ${LOCAL_VIRTUALENV_BIN_DIR}/pip install
-                    --force-reinstall
-                    -r ${PROJECT_SOURCE_DIR}/Tests/Data/requirements-gmsh-nox.txt
+                COMMAND
+                    ${_apple_env} ${LOCAL_VIRTUALENV_BIN_DIR}/pip install
+                    --force-reinstall -r
+                    ${PROJECT_SOURCE_DIR}/Tests/Data/requirements-gmsh-nox.txt
                 WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
                 RESULT_VARIABLE _return_code
                 OUTPUT_VARIABLE _out
@@ -170,3 +172,35 @@ function(setup_venv)
         endif()
     endif()
 endfunction()
+
+function(setup_venv_dependent_ctests)
+    if(NOT OGS_USE_MPI AND OGS_BUILD_TESTING AND OGS_BUILD_PROCESS_HT)
+        execute_process(
+            COMMAND
+                ${Python_EXECUTABLE}
+                ${Data_SOURCE_DIR}/Parabolic/HT/InvalidProjectFiles/generateInvalidMediaForHT.py
+            WORKING_DIRECTORY
+                ${Data_SOURCE_DIR}/Parabolic/HT/InvalidProjectFiles
+        )
+        file(GLOB HT_INVALID_PRJ_FILES
+             ${Data_SOURCE_DIR}/Parabolic/HT/InvalidProjectFiles/*.prj
+        )
+        foreach(ht_invalid_prj_file ${HT_INVALID_PRJ_FILES})
+            string(
+                REPLACE ${Data_SOURCE_DIR}/Parabolic/HT/InvalidProjectFiles/HT
+                        "invalid" ht_invalid_prj_file_short
+                        ${ht_invalid_prj_file}
+            )
+            AddTest(
+                NAME HT_${ht_invalid_prj_file_short}
+                PATH Parabolic/HT/InvalidProjectFiles
+                EXECUTABLE ogs
+                EXECUTABLE_ARGS ${ht_invalid_prj_file}
+                RUNTIME 1
+            )
+            set_tests_properties(
+                ogs-HT_${ht_invalid_prj_file_short} PROPERTIES WILL_FAIL TRUE
+            )
+        endforeach()
+    endif()
+endfunction()