diff --git a/qutebrowser/mainwindow/statusbar/percentage.py b/qutebrowser/mainwindow/statusbar/percentage.py
index 339534b33..d5f3189b6 100644
--- a/qutebrowser/mainwindow/statusbar/percentage.py
+++ b/qutebrowser/mainwindow/statusbar/percentage.py
@@ -34,11 +34,11 @@ class Percentage(textbase.TextBase):
         self.set_perc(0, 0)
 
     @pyqtSlot(int, int)
-    def set_perc(self, _, y):
+    def set_perc(self, x, y):  # pylint: disable=unused-argument
         """Setter to be used as a Qt slot.
 
         Args:
-            _: The x percentage (int), currently ignored.
+            x: The x percentage (int), currently ignored.
             y: The y percentage (int)
         """
         if y == 0:
diff --git a/tests/mainwindow/statusbar/test_percentage.py b/tests/mainwindow/statusbar/test_percentage.py
index 5f17656ad..f43ffcfcf 100644
--- a/tests/mainwindow/statusbar/test_percentage.py
+++ b/tests/mainwindow/statusbar/test_percentage.py
@@ -61,6 +61,6 @@ def test_percentage_text(percentage, y, expected):
 def test_tab_change(percentage):
     """Make sure the percentage gets changed correctly when switching tabs."""
     percentage.set_perc(x=None, y=10)
-    tab = FakeTab(20)
+    tab = FakeTab([0, 20])
     percentage.on_tab_changed(tab)
     assert percentage.text() == '[20%]'