diff --git a/doc/manual/sphinx/source/test_items/lua_func_test_item.rst b/doc/manual/sphinx/source/test_items/lua_func_test_item.rst
index 9662d3f..efbbb6a 100644
--- a/doc/manual/sphinx/source/test_items/lua_func_test_item.rst
+++ b/doc/manual/sphinx/source/test_items/lua_func_test_item.rst
@@ -64,7 +64,7 @@ In the example above, the global variable ``$(lfn_activity)``
 would be created at the end of the item execution. It would contain the resulting
 value of the funcToBeExecuted python function.
 
-**Global variables**
+**Lua Interpreter environment setup**
 
 Some global variables have an impact on the ``lua_func`` test item behavior:
 
diff --git a/doc/manual/sphinx/source/test_items/py_func_test_item.rst b/doc/manual/sphinx/source/test_items/py_func_test_item.rst
index 55ec449..8f7da53 100644
--- a/doc/manual/sphinx/source/test_items/py_func_test_item.rst
+++ b/doc/manual/sphinx/source/test_items/py_func_test_item.rst
@@ -107,10 +107,22 @@ In the example above, the global variable ``$(pfn_function test item)``
 would be created at the end of the item execution. It would contain the resulting
 value of the funcToBeExecuted python function.
 
-**Global variables**
+**Python Interpreter environment setup**
 
 Some global variables have an impact on the ``py_func`` test item behavior:
     
 * ``python_path``: This optional global variable can be used to define
   the python executable path. If not defined, the python interpreter is
   searched in at the default places in the system.
+* ``python_env``: This global variable can be used to define
+  environment variables for the lua script execution environment.
+  Only `PATH`, `LUA_PATH`, and `LUA_CPATH` are supported.
+
+  .. code-block:: yaml
+      :caption: example of configuration file: param.yaml
+
+      [...]
+      python_env:
+        PATH: "/my/path/"
+        PYTHONPATH: "/my/python/modules/"
+      [...]
\ No newline at end of file
diff --git a/src/testium/interpreter/utils/icons.py b/src/testium/interpreter/utils/icons.py
index 9049d61..58e3208 100644
--- a/src/testium/interpreter/utils/icons.py
+++ b/src/testium/interpreter/utils/icons.py
@@ -6,7 +6,7 @@ def icon_prefix():
     if not hasattr(prefs, "settings"):
         prefs.init()
     
-    if isinstance(prefs.settings.icons_theme, int) and 0 <= prefs.settings.icons_theme < len(cst.ICON_THEMES_PREFIX):
+    if isinstance(prefs.settings.icons_theme, int) and (0 <= prefs.settings.icons_theme < len(cst.ICON_THEMES_PREFIX)):
         return cst.ICON_THEMES_PREFIX[prefs.settings.icons_theme]
     else:
         return cst.ICON_THEMES_PREFIX[0]
\ No newline at end of file
diff --git a/src/testium/interpreter/utils/py_func_exec.py b/src/testium/interpreter/utils/py_func_exec.py
index b970b48..38f0971 100644
--- a/src/testium/interpreter/utils/py_func_exec.py
+++ b/src/testium/interpreter/utils/py_func_exec.py
@@ -1,3 +1,4 @@
+import os
 import sys
 import shutil
 import subprocess
@@ -69,6 +70,22 @@ class PyFuncExecEngine:
         if self._process is not None:
             raise ETUMRuntimeError("The function subprocess has already been started.")
 
+        # POpen config
+        CUST_ENV = {
+            "PATH": {"replace": False},
+            "PYTHONPATH": {"replace": True},
+        }
+
+        py_env = tm.gd("python_env", {})
+        env = os.environ.copy()
+        for k, v in CUST_ENV.items():
+            e = py_env.get(k, "")
+            if e != "":
+                if v["replace"]:
+                    env[k] = e
+                else:
+                    env[k] = e + ";" + env.get(k, "")
+
         sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
         sock.bind(("localhost", 0))
         self._port = sock.getsockname()[1]
@@ -81,7 +98,7 @@ class PyFuncExecEngine:
             params.append("-v")
 
         self._process = subprocess.Popen(
-            params, cwd=func_proc_path
+            params, env=env, cwd=func_proc_path
         )
 
         # Port was reserved until the sub-process is started. Now released.