diff --git a/tests/helpers/fixtures.py b/tests/helpers/fixtures.py
index 651f30ed6..5d7824fa1 100644
--- a/tests/helpers/fixtures.py
+++ b/tests/helpers/fixtures.py
@@ -126,7 +126,7 @@ def tab_registry(win_registry):
 
 
 @pytest.fixture
-def fake_web_tab(stubs, tab_registry, qapp):
+def fake_web_tab(stubs, tab_registry, mode_manager, qapp):
     """Fixture providing the FakeWebTab *class*."""
     if PYQT_VERSION < 0x050600:
         pytest.skip('Causes segfaults, see #1638')