diff --git a/tests/test_common.py b/tests/test_common.py
index ba3e50d..470222a 100644
--- a/tests/test_common.py
+++ b/tests/test_common.py
@@ -10,7 +10,8 @@
 def test_find_c10():
     dirname = os.path.dirname(__file__)
     result = common.find_c10([dirname])
-    assert set(result) == set([pytest.SAMPLE, pytest.EVENTS, pytest.ETHERNET])
+    assert set(result) == set([
+        pytest.ERR, pytest.SAMPLE, pytest.EVENTS, pytest.ETHERNET])
 
 
 def test_fmt_table():