fixed regression introduced in my last commit

work related to [https://bugzilla.ipr.univ-rennes.fr/show_bug.cgi?id=3958]

ci/ipr.jenkins

@@ -22,7 +22,7 @@ pipeline {
                 sh """#!/bin/bash
                 set -o errexit
                 source ${IPRBENCH_VENV_PATH}/bin/activate &&
-                python -m unittest ./test
+                python -m unittest
                 """
             }
         }