--- a/tests/test_incoming.py	Thu Jun 23 23:01:48 2016 +0800
+++ b/tests/test_incoming.py	Thu Jun 23 23:04:26 2016 +0800
@@ -27,6 +27,14 @@
     assert extra['filename'] == 'requirements.txt'
     assert extra['fileline'] == 1
 
+    errors, warnings, extra = mlo('ham.lua:414:90: (E101) foo is not good')
+    assert errors == 1
+    assert warnings == 0
+    assert sorted(extra.keys()) == ['cls', 'fileline', 'filename']
+    assert extra['cls'] == 'error'
+    assert extra['filename'] == 'ham.lua'
+    assert extra['fileline'] == 414
+
 
 def test_parse_project_url():
     result = parse_project_url('https://example.com/alice/hello-world')