diff --git a/rbtools/commands/tests/test_main.py b/rbtools/commands/tests/test_main.py
index 8dae63f592727e42bbf371dbe50e7e3e4cb077d3..5d2223214acb81cb650d16b1ad987df4f6c6538c 100644
--- a/rbtools/commands/tests/test_main.py
+++ b/rbtools/commands/tests/test_main.py
@@ -117,4 +117,9 @@ class MainCommandTests(RBTestBase):
             unicode:
             The resulting output from the command.
         """
-        return execute([sys.executable, _rbt_path] + list(args))
+        return execute([
+            sys.executable,
+            '-W',
+            'ignore',
+            _rbt_path,
+        ] + list(args))