diff --git a/test/unit/test_builder.py b/test/unit/test_builder.py
index 17a8fe0..0080c59 100644
--- a/test/unit/test_builder.py
+++ b/test/unit/test_builder.py
@@ -489,6 +489,8 @@ class TestBuilderPlugin(PluginTest):
             handler.handler(*args)
 
         self.uploads.assert_upload("compose-request.json")
+        # build must not have been tagged
+        self.assertEqual(len(session.host.tags), 0)
 
     @httpretty.activate
     def test_cli_compose_success(self):