diff --git a/python/.gitignore b/python/.gitignore
index ecf7820..787414d 100644
--- a/python/.gitignore
+++ b/python/.gitignore
@@ -9,6 +9,6 @@ __pycache__
 *.pyc
 build-result/
 dist/
-kcl_lib/lib
+kcl_lib/bin
 kcl_lib.egg-info/
 .eggs/
diff --git a/python/Makefile b/python/Makefile
index c6e2c81..731b5d1 100644
--- a/python/Makefile
+++ b/python/Makefile
@@ -4,9 +4,9 @@ dist:
 	rm -rf build
 	rm -rf dist
 	rm -rf kcl_lib.egg-info
-	rm -rf kcl_lib/lib/**
+	rm -rf kcl_lib/bin/**
 	for platform in $(PLATFORMS); do \
-		rm -rf build && rm -rf kcl_lib/lib && python3 setup.py bdist_wheel --plat-name $$platform; \
+		rm -rf build && rm -rf kcl_lib/bin && python3 setup.py bdist_wheel --plat-name $$platform; \
 	done
 	python3 -m twine upload dist/kcl_lib-*
 
diff --git a/python/kcl_lib/api/service.py b/python/kcl_lib/api/service.py
index 38b0030..7c360ba 100644
--- a/python/kcl_lib/api/service.py
+++ b/python/kcl_lib/api/service.py
@@ -5,7 +5,7 @@
 from kcl_lib.bootstrap import (
     KCLVM_CLI_INSTALL_PATH_ENV_VAR,
     KCLVM_CLI_BIN_PATH_ENV_VAR,
-    KCLVM_CLI_USE_RELEASE_ENV_VAR,
+    KCLVM_CLI_USE_TEST_ENV_VAR,
     lib_full_name,
     install_kclvm,
 )
@@ -104,7 +104,7 @@ def __init__(self):
         self._dir = tempfile.TemporaryDirectory()
         env_path = os.environ.get(KCLVM_CLI_BIN_PATH_ENV_VAR)
         env_install_path = os.environ.get(KCLVM_CLI_INSTALL_PATH_ENV_VAR)
-        env_use_release = os.environ.get(KCLVM_CLI_USE_RELEASE_ENV_VAR)
+        env_use_test = os.environ.get(KCLVM_CLI_USE_TEST_ENV_VAR)
         if env_path:
             self.lib = ctypes.CDLL(os.path.join(env_path, lib_full_name()))
         elif env_install_path:
@@ -112,15 +112,16 @@ def __init__(self):
             self.lib = ctypes.CDLL(
                 os.path.join(env_install_path, "bin", lib_full_name())
             )
-        elif env_use_release:
-            # The release lib is located at "kcl_lib/lib/"
-            lib_path = LIB_ROOT.joinpath("lib")
-            os.environ[KCLVM_CLI_BIN_PATH_ENV_VAR] = str(lib_path)
-            self.lib = ctypes.CDLL(str(lib_path.joinpath(lib_full_name())))
-        else:
+        # Default test cases
+        elif env_use_test:
             # Install temp path.
             install_kclvm(self._dir.name)
             self.lib = ctypes.CDLL(self._dir.name + "/bin/" + lib_full_name())
+        else:
+            # The release lib is located at "kcl_lib/bin/"
+            lib_path = LIB_ROOT.joinpath("bin")
+            os.environ[KCLVM_CLI_BIN_PATH_ENV_VAR] = str(lib_path)
+            self.lib = ctypes.CDLL(str(lib_path.joinpath(lib_full_name())))
         # Assuming the shared library exposes a function `kclvm_service_new`
         self.lib.kclvm_service_new.argtypes = [ctypes.c_uint64]
         self.lib.kclvm_service_new.restype = ctypes.c_void_p
diff --git a/python/kcl_lib/bootstrap/__init__.py b/python/kcl_lib/bootstrap/__init__.py
index 9c66930..1eee179 100644
--- a/python/kcl_lib/bootstrap/__init__.py
+++ b/python/kcl_lib/bootstrap/__init__.py
@@ -6,7 +6,7 @@
 KCLVM_VERSION = "0.8.0-alpha.5"  # You should replace this with actual version
 KCLVM_CLI_BIN_PATH_ENV_VAR = "KCLVM_CLI_BIN_PATH"
 KCLVM_CLI_INSTALL_PATH_ENV_VAR = "KCLVM_CLI_INSTALL_PATH"
-KCLVM_CLI_USE_RELEASE_ENV_VAR = "KCLVM_CLI_USE_RELEASE"
+KCLVM_CLI_USE_TEST_ENV_VAR = "KCLVM_CLI_USE_TEST"
 LIB_NAME = "kclvm_cli_cdylib"
 
 
diff --git a/python/setup.py b/python/setup.py
index 8038c83..eed8d7e 100644
--- a/python/setup.py
+++ b/python/setup.py
@@ -107,13 +107,13 @@ def copyfile(src: pathlib.Path, dst: pathlib.Path) -> str:
     return str(dst.relative_to(pathlib.Path(__file__).parent))
 
 
-# Copy libs to the kcl_lib/lib folder
+# Copy libs to the kcl_lib/bin folder
 def copy_libs():
     source_dir = pathlib.Path(__file__).parent.parent
-    target_dir = pathlib.Path(__file__).parent.joinpath("kcl_lib").joinpath("lib")
+    target_dir = pathlib.Path(__file__).parent.joinpath("kcl_lib").joinpath("bin")
     data_files = []
     data_files.append(copyfile(source_dir / cli_lib(), target_dir / lib_name()))
-    if PLATFORM in ["windows"]:
+    if PLATFORM in ["win32", "windows"]:
         data_files.append(
             copyfile(source_dir / export_lib(), target_dir / export_lib_name())
         )
@@ -134,7 +134,7 @@ def copy_libs():
 setup(
     name="kcl_lib",
     author="KCL Authors",
-    version="0.8.0-alpha.5",
+    version="0.8.0-alpha.6",
     license="Apache License 2.0",
     python_requires=">=3.7",
     description="KCL Artifact Library for Python",
diff --git a/python/tests/exec_test.py b/python/tests/exec_test.py
index d7b8d20..1e45aed 100644
--- a/python/tests/exec_test.py
+++ b/python/tests/exec_test.py
@@ -1,3 +1,9 @@
+import os
+import kcl_lib.bootstrap as bootstrap
+
+os.environ[bootstrap.KCLVM_CLI_USE_TEST_ENV_VAR] = "ok"
+
+
 def test_exec_api():
     import kcl_lib.api as api