diff --git a/test/utils.py b/test/utils.py
index 37a7f5d..89b9c75 100755
--- a/test/utils.py
+++ b/test/utils.py
@@ -2,9 +2,9 @@
 import os
 import subprocess
 
-os.environ["PDAL_DRIVER_PATH"] = os.path.abspath('./install/lib')
-
 def pdal_has_plugin(name_filter):
+    os.environ["PDAL_DRIVER_PATH"] = os.path.abspath('./install/lib')
+    print("init pdal driver : ", os.environ["PDAL_DRIVER_PATH"])
     result = subprocess.run(['pdal', '--drivers'], stdout=subprocess.PIPE)
     if name_filter not in result.stdout.decode('utf-8'):
         raise ValueError("le script " + name_filter + " n'est pas visible")