diff --git a/test/functional/tests/conftest.py b/test/functional/tests/conftest.py
index 439032d..86fdea8 100644
--- a/test/functional/tests/conftest.py
+++ b/test/functional/tests/conftest.py
@@ -326,6 +326,8 @@ def __drbd_cleanup():
     if installer.check_if_installed():
         casadm.stop_all_caches()
 
+    remove("/etc/drbd.d/*.res", force=True, ignore_errors=True)
+
 
 class Opencas(metaclass=Singleton):
     def __init__(self, repo_dir, working_dir):