diff --git a/imperative/python/test/run.sh b/imperative/python/test/run.sh
index f8295a75..6132ad74 100755
--- a/imperative/python/test/run.sh
+++ b/imperative/python/test/run.sh
@@ -42,9 +42,10 @@ else
     cd $(dirname "${BASH_SOURCE[0]}")/..
     test_dirs="megengine test"
     echo "test develop env"
-    PYTHONPATH="." PY_IGNORE_IMPORTMISMATCH=1 python3 -m pytest -s -v $test_dirs -m 'not isolated_distributed'
+    TEST_PY_PATH="."
+    PYTHONPATH=${TEST_PY_PATH} PY_IGNORE_IMPORTMISMATCH=1 python3 -m pytest -s -v $test_dirs -m 'not isolated_distributed'
     if [[ "$TEST_PLAT" =~ "cuda" ]]; then
         echo "test GPU pytest now"
-        PYTHONPATH="." PY_IGNORE_IMPORTMISMATCH=1 python3 -m pytest -s -v $test_dirs -m 'isolated_distributed'
+        PYTHONPATH=${TEST_PY_PATH} PY_IGNORE_IMPORTMISMATCH=1 python3 -m pytest -s -v $test_dirs -m 'isolated_distributed'
     fi
 fi
diff --git a/scripts/whl/BUILD_PYTHON_WHL_README.md b/scripts/whl/BUILD_PYTHON_WHL_README.md
index 9bfdc265..daa8ba4d 100755
--- a/scripts/whl/BUILD_PYTHON_WHL_README.md
+++ b/scripts/whl/BUILD_PYTHON_WHL_README.md
@@ -98,4 +98,4 @@ If you do not want to create whl file when debug Python3 binding, you can call `
 * cuda with `RelWithDebInfo` mode: `EXTRA_CMAKE_ARGS="-DCMAKE_BUILD_TYPE=RelWithDebInfo" scripts/cmake-build/host_build.sh -c -t`
 * cpu only with `RelWithDebInfo` mode: `EXTRA_CMAKE_ARGS="-DCMAKE_BUILD_TYPE=RelWithDebInfo" scripts/cmake-build/host_build.sh -t`
 
-Start `Python3 ` with env for support `MegEngine` after build: `PYTHONPATH=imperative/python:$PYTHONPATH python3 `
+Start `Python3 ` with env for support `MegEngine` after build: `PYTHONPATH=imperative/python:python_module:$PYTHONPATH python3 `