diff --git a/tests/conftest.py b/tests/conftest.py
index cf34f75d5..892a91912 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -107,7 +107,7 @@ def pytest_collection_modifyitems(items):
         http://pytest.org/latest/plugins.html
     """
     for item in items:
-        if 'qtbot' in item.fixturenames:
+        if 'qtbot' in getattr(item, 'fixturenames', ()):
             item.add_marker('gui')