diff --git a/utils/test/test-parser-simple-tests.py b/utils/test/test-parser-simple-tests.py
index 42f483390..0695b9bbd 100644
--- a/utils/test/test-parser-simple-tests.py
+++ b/utils/test/test-parser-simple-tests.py
@@ -441,6 +441,9 @@ syntax_failure = (
     'network/network_ok_17.sd',
     'network/network_ok_45.sd',
     'network/network_ok_46.sd',
+
+    # detached mount
+    'mount/ok_opt_86.sd',
 )