Call mock_model with the class name instead of a string

spec/views/home/index.html.haml_spec.rb

@@ -3,10 +3,10 @@ require 'spec_helper'
 describe 'home/index.html.haml' do
   before do
     assign :playlists, [
-      mock_model('Playlist', :name => 'Electro')
+      mock_model(Playlist, :name => 'Electro')
     ]
     assign :tracks, [
-      mock_model('Track', :name => 'Mega song')
+      mock_model(Track, :name => 'Mega song')
     ]
   end
 

spec/views/playlists/edit.html.haml_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 describe 'playlists/edit.html.haml' do
   let(:playlist) do
-    mock_model('Playlist').as_new_record.as_null_object
+    mock_model(Playlist).as_new_record.as_null_object
   end
 
   before do

spec/views/playlists/index.html.haml_spec.rb

@@ -3,7 +3,7 @@ require 'spec_helper'
 describe 'playlists/index.html.haml' do
   before do
     assign :playlists, [
-      mock_model('Playlist', :name => 'Electro')
+      mock_model(Playlist, :name => 'Electro')
     ]
   end
 

spec/views/playlists/new.html.haml_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 describe 'playlists/new.html.haml' do
   let(:playlist) do
-    mock_model('Playlist').as_new_record.as_null_object
+    mock_model(Playlist).as_new_record.as_null_object
   end
 
   before do

spec/views/tracks/new.html.haml_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 describe 'tracks/new.html.haml' do
   let(:track) do
-    mock_model('Track').as_new_record.as_null_object
+    mock_model(Track).as_new_record.as_null_object
   end
 
   before do

spec/views/users/new.html.haml_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 describe 'users/new.html.haml' do
   let(:user) do
-    mock_model('User').as_new_record.as_null_object
+    mock_model(User).as_new_record.as_null_object
   end
 
   before do