diff --git a/tools/test.py b/tools/test.py
index 207f39ebfce1ed..e7c01c8658b23d 100755
--- a/tools/test.py
+++ b/tools/test.py
@@ -1578,7 +1578,7 @@ def Main():
         }
         test_list = root.ListTests([], path, context, arch, mode)
         unclassified_tests += test_list
-        (cases, unused_rules, all_outcomes) = (
+        (cases, unused_rules, _) = (
             config.ClassifyTests(test_list, env))
         if globally_unused_rules is None:
           globally_unused_rules = set(unused_rules)