diff --git a/unittest/force-styles/CMakeLists.txt b/unittest/force-styles/CMakeLists.txt
index 7d29395e39..f47bb75305 100644
--- a/unittest/force-styles/CMakeLists.txt
+++ b/unittest/force-styles/CMakeLists.txt
@@ -204,11 +204,7 @@ foreach(TEST ${FIX_TIMESTEP_TESTS})
     continue()
   endif()
   add_test(NAME ${TNAME} COMMAND test_fix_timestep ${TEST})
-if(WIN32)
-  set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR};PYTHONPATH=${TEST_INPUT_FOLDER}\\\;${LAMMPS_PYTHON_DIR}")
-else()
-  set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR};PYTHONPATH=${TEST_INPUT_FOLDER}:${LAMMPS_PYTHON_DIR}:$ENV{PYTHONPATH};PYTHONDONTWRITEBYTECODE=1")
-endif()
+  set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "${FORCE_TEST_ENVIRONMENT}")
   set_tests_properties(${TNAME} PROPERTIES LABELS "${TEST_TAGS}")
 endforeach()
 
@@ -225,7 +221,7 @@ foreach(TEST ${DIHEDRAL_TESTS})
     continue()
   endif()
   add_test(NAME ${TNAME} COMMAND test_dihedral_style ${TEST})
-  set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR};PYTHONPATH=${TEST_INPUT_FOLDER}:$ENV{PYTHONPATH};PYTHONDONTWRITEBYTECODE=1")
+  set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "${FORCE_TEST_ENVIRONMENT}")
   set_tests_properties(${TNAME} PROPERTIES LABELS "${TEST_TAGS}")
 endforeach()
 
@@ -242,7 +238,7 @@ foreach(TEST ${IMPROPER_TESTS})
     continue()
   endif()
   add_test(NAME ${TNAME} COMMAND test_improper_style ${TEST})
-  set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "LAMMPS_POTENTIALS=${LAMMPS_POTENTIALS_DIR};PYTHONPATH=${TEST_INPUT_FOLDER}:$ENV{PYTHONPATH};PYTHONDONTWRITEBYTECODE=1")
+  set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "${FORCE_TEST_ENVIRONMENT}")
   set_tests_properties(${TNAME} PROPERTIES LABELS "${TEST_TAGS}")
 endforeach()
 
@@ -250,7 +246,7 @@ if(MLIAP_ENABLE_PYTHON AND (NOT WIN32))
   add_executable(test_mliappy_unified test_mliappy_unified.cpp)
   target_link_libraries(test_mliappy_unified PRIVATE lammps GTest::GMockMain)
   add_test(NAME TestMliapPyUnified COMMAND test_mliappy_unified)
-  set_tests_properties(TestMliapPyUnified PROPERTIES ENVIRONMENT "PYTHONPATH=${LAMMPS_PYTHON_DIR};PYTHONDONTWRITEBYTECODE=1")
+  set_tests_properties(${TNAME} PROPERTIES ENVIRONMENT "${FORCE_TEST_ENVIRONMENT}")
 endif()
 
 add_executable(test_pair_list test_pair_list.cpp)