diff -u -r -N a/test/dla/CMakeLists.txt b/test/dla/CMakeLists.txt
--- a/test/dla/CMakeLists.txt	2020-10-23 17:48:19.000000000 +0900
+++ b/test/dla/CMakeLists.txt	2020-10-23 17:49:46.000000000 +0900
@@ -2,7 +2,7 @@
 configure_file(test.py ${CMAKE_CURRENT_BINARY_DIR} COPYONLY)
 file(GLOB jsons "*.json")
 set(BUILD_TOOL_DIR ${CMAKE_BINARY_DIR}/tool)
-set(PYTHONPATH "${BUILD_TOOL_DIR}:${pythonpath_build}")
+set(PYTHONPATH "${BUILD_TOOL_DIR}:${pythonpath_build}:$ENV{PYTHONPATH}")
 foreach(json ${jsons})
   configure_file(${json} ${CMAKE_CURRENT_BINARY_DIR} COPYONLY)
   file(RELATIVE_PATH jsonfilename ${CMAKE_CURRENT_SOURCE_DIR} ${json})
diff -u -r -N a/test/pmwa/CMakeLists.txt b/test/pmwa/CMakeLists.txt
--- a/test/pmwa/CMakeLists.txt	2020-10-28 14:22:18.000000000 +0900
+++ b/test/pmwa/CMakeLists.txt	2020-10-28 14:22:57.000000000 +0900
@@ -10,7 +10,7 @@
   file(RELATIVE_PATH jsonfilename ${CMAKE_CURRENT_SOURCE_DIR} ${json})
 
   add_test(NAME "pmwa/${jsonfilename}"
-    COMMAND env PYTHONPATH=${pythonpath_build} ${PYTHON_EXECUTABLE} test.py ${CMAKE_BINARY_DIR}/src/pmwa ${CMAKE_CURRENT_BINARY_DIR}/${jsonfilename}
+    COMMAND env PYTHONPATH=${pythonpath_build}:$ENV{PYTHONPATH} ${PYTHON_EXECUTABLE} test.py ${CMAKE_BINARY_DIR}/src/pmwa ${CMAKE_CURRENT_BINARY_DIR}/${jsonfilename}
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/
     )
 endforeach(json)