diff --git a/awesomerc.lua.in b/awesomerc.lua.in
index 26e930aa7..c018551b2 100644
--- a/awesomerc.lua.in
+++ b/awesomerc.lua.in
@@ -230,7 +230,7 @@ keybinding({ modkey }, "F1", function ()
                                      awful.prompt({ prompt = "Run: ", cursor_fg = fg_focus, cursor_bg = bg_focus }, mypromptbox, awful.spawn, awful.completion.bash)
                                  end):add()
 keybinding({ modkey }, "F4", function ()
-                                     awful.prompt({ prompt = "Run Lua code: ", cursor_fg = fg_focus, cursor_bg = bg_focus }, mypromptbox, awful.eval, nil)
+                                     awful.prompt({ prompt = "Run Lua code: ", cursor_fg = fg_focus, cursor_bg = bg_focus }, mypromptbox, awful.eval)
                                  end):add()
 
 --- Tabulous, tab manipulation
@@ -238,10 +238,10 @@ keybinding({ modkey, "Control" }, "y", function ()
     local tabbedview = tabulous.tabindex_get()
     local nextclient = awful.client.next(1)
 
-    if tabbedview == nil then
+    if not tabbedview then
         tabbedview = tabulous.tabindex_get(nextclient)
 
-        if tabbedview == nil then
+        if not tabbedview then
             tabbedview = tabulous.tab_create()
             tabulous.tab(tabbedview, nextclient)
         else
@@ -257,7 +257,7 @@ keybinding({ modkey, "Shift" }, "y", tabulous.untab):add()
 keybinding({ modkey }, "y", function ()
    local tabbedview = tabulous.tabindex_get()
 
-   if tabbedview ~= nil then
+   if tabbedview then
        local n = tabulous.next(tabbedview)
        tabulous.display(tabbedview, n)
    end
@@ -269,7 +269,7 @@ keybinding({ modkey, 'Shift' }, "t", function ()
     local tabbedview = tabulous.tabindex_get()
     local clients = awful.client.getmarked()
 
-    if tabbedview == nil then
+    if not tabbedview then
         tabbedview = tabulous.tab_create(clients[1])
         table.remove(clients, 1)
     end