diff --git a/tests/disk_check_test.py b/tests/disk_check_test.py
index 5a6c60dd5a..c9c5a4e2d4 100644
--- a/tests/disk_check_test.py
+++ b/tests/disk_check_test.py
@@ -248,5 +248,5 @@ def test_do_unmnt(self, mock_proc, mock_log):
 
     @classmethod
     def teardown_class(cls):
-        subprocess.run("rm -rf /tmp/tmp*", shell=True)  # cleanup the temporary dirs
+        subprocess.run(["rm", "-rf", "/tmp/tmpx", "/tmp/tmpy"])  # cleanup the temporary dirs
         print("TEARDOWN")