diff --git a/test/test_assert_private_dirs.py b/test/test_assert_private_dirs.py
index 0cba1f6..19cffcf 100644
--- a/test/test_assert_private_dirs.py
+++ b/test/test_assert_private_dirs.py
@@ -25,7 +25,7 @@ def test_pdirs_missing(runner, yadm_cmd, paths, home):
             path.remove()
         assert not path.exists()
 
-    env = {"DEBUG": "yes"}
+    env = {"DEBUG": ""}
     if home:
         env["HOME"] = paths.work