diff --git a/pifpaf/drivers/gnocchi.py b/pifpaf/drivers/gnocchi.py
index <HASH>..<HASH> 100644
--- a/pifpaf/drivers/gnocchi.py
+++ b/pifpaf/drivers/gnocchi.py
@@ -87,7 +87,7 @@ url = %s""" % (self.tempdir, self.port, pg.url))
         self.putenv("GNOCCHI_PORT", str(self.port))
         self.putenv("URL", "gnocchi://localhost:%d" % self.port)
         self.putenv("GNOCCHI_HTTP_URL", self.http_url)
-        self.putenv("GNOCCHI_ENDPOINT", self.http_url)
-        self.putenv("OS_AUTH_TYPE", "gnocchi-noauth")
-        self.putenv("GNOCCHI_USER_ID", "admin")
-        self.putenv("GNOCCHI_PROJECT_ID", "admin")
+        self.putenv("GNOCCHI_ENDPOINT", self.http_url, True)
+        self.putenv("OS_AUTH_TYPE", "gnocchi-noauth", True)
+        self.putenv("GNOCCHI_USER_ID", "admin", True)
+        self.putenv("GNOCCHI_PROJECT_ID", "admin", True)
gnocchi: fix a regression on variable names

These ones should not be prefixed.