diff --git a/wagtail/wagtailimages/models.py b/wagtail/wagtailimages/models.py
index 24fd1f0bf..a2be29486 100644
--- a/wagtail/wagtailimages/models.py
+++ b/wagtail/wagtailimages/models.py
@@ -180,27 +180,25 @@ class Filter(models.Model):
         generate an output image with this filter applied, returning it
         as another django.core.files.File object
         """
-        
         backend = get_image_backend(backend_name)
-        
+
         if not self.method:
             self._parse_spec_string()
-        
+
         # If file is closed, open it
         input_file.open('rb')
         image = backend.open_image(input_file)
         file_format = image.format
-        
+
         method = getattr(backend, self.method_name)
 
         image = method(image, self.method_arg)
 
         output = StringIO.StringIO()
         backend.save_image(image, output, file_format)
-        
+
         # and then close the input file
         input_file.close()
-        
 
         # generate new filename derived from old one, inserting the filter spec string before the extension
         input_filename_parts = os.path.basename(input_file.name).split('.')
@@ -210,7 +208,6 @@ class Filter(models.Model):
         output_filename = '.'.join(output_filename_parts)
 
         output_file = File(output, name=output_filename)
-        
 
         return output_file
 
diff --git a/wagtail/wagtailimages/tests.py b/wagtail/wagtailimages/tests.py
index 00d1245e6..1bc2acc93 100644
--- a/wagtail/wagtailimages/tests.py
+++ b/wagtail/wagtailimages/tests.py
@@ -84,10 +84,10 @@ class TestRenditions(TestCase):
         # default backend should be pillow
         backend = get_image_backend()
         self.assertTrue(isinstance(backend, PillowBackend))
-        
+
     def test_minification(self):
         rendition = self.image.get_rendition('width-400')
-        
+
         # Check size
         self.assertEqual(rendition.width, 400)
         self.assertEqual(rendition.height, 300)
@@ -114,7 +114,7 @@ class TestRenditions(TestCase):
 
         # Check that they are the same object
         self.assertEqual(first_rendition, second_rendition)
-        
+
 
 class TestRenditionsWand(TestCase):
     def setUp(self):
@@ -134,18 +134,18 @@ class TestRenditionsWand(TestCase):
 
     def test_minification(self):
         rendition = self.image.get_rendition('width-400')
-        
+
         # Check size
         self.assertEqual(rendition.width, 400)
         self.assertEqual(rendition.height, 300)
-        
+
     def test_resize_to_max(self):
         rendition = self.image.get_rendition('max-100x100')
-        
+
         # Check size
         self.assertEqual(rendition.width, 100)
         self.assertEqual(rendition.height, 75)
-        
+
     def test_resize_to_min(self):
         rendition = self.image.get_rendition('min-120x120')
 
@@ -160,7 +160,7 @@ class TestRenditionsWand(TestCase):
 
         # Check that they are the same object
         self.assertEqual(first_rendition, second_rendition)
-        
+
 
 class TestImageTag(TestCase):
     def setUp(self):