diff --git a/qutebrowser/completion/models/miscmodels.py b/qutebrowser/completion/models/miscmodels.py
index 657a73c8c..62267d51c 100644
--- a/qutebrowser/completion/models/miscmodels.py
+++ b/qutebrowser/completion/models/miscmodels.py
@@ -206,10 +206,10 @@ class TabCompletionModel(base.BaseCompletionModel):
             tabbed_browser = objreg.get('tabbed-browser', scope='window',
                                         window=win_id)
             if not tabbed_browser.shutting_down:
-                window_count = window_count + 1
+                window_count += 1
 
         if window_count < self.rowCount():
-            self.removeRows(window_count, self.rowCount()-window_count)
+            self.removeRows(window_count, self.rowCount() - window_count)
 
         for i, win_id in enumerate(objreg.window_registry):
             tabbed_browser = objreg.get('tabbed-browser', scope='window',
@@ -223,15 +223,15 @@ class TabCompletionModel(base.BaseCompletionModel):
                 c.setData("{}".format(win_id), Qt.DisplayRole)
             if tabbed_browser.count() < c.rowCount():
                 c.removeRows(tabbed_browser.count(),
-                             c.rowCount()-tabbed_browser.count())
+                             c.rowCount() - tabbed_browser.count())
             for idx in range(tabbed_browser.count()):
                 tab = tabbed_browser.widget(idx)
                 if idx >= c.rowCount():
-                    self.new_item(c, "{}/{}".format(win_id, idx+1),
+                    self.new_item(c, "{}/{}".format(win_id, idx + 1),
                                   tab.url().toDisplayString(),
                                   tabbed_browser.page_title(idx))
                 else:
-                    c.child(idx, 0).setData("{}/{}".format(win_id, idx+1),
+                    c.child(idx, 0).setData("{}/{}".format(win_id, idx + 1),
                                             Qt.DisplayRole)
                     c.child(idx, 1).setData(tab.url().toDisplayString(),
                                             Qt.DisplayRole)
@@ -250,9 +250,7 @@ class TabCompletionModel(base.BaseCompletionModel):
         qtutils.ensure_valid(category)
         index = category.child(index.row(), self.IDX_COLUMN)
         win_id, tab_index = index.data().split('/')
-        win_id = int(win_id)
-        tab_index = int(tab_index)
 
         tabbed_browser = objreg.get('tabbed-browser', scope='window',
-                                    window=win_id)
-        tabbed_browser.on_tab_close_requested(tab_index-1)
+                                    window=int(win_id))
+        tabbed_browser.on_tab_close_requested(int(tab_index) - 1)