diff --git a/avatar/forms.py b/avatar/forms.py
index 86df8af..6646a96 100644
--- a/avatar/forms.py
+++ b/avatar/forms.py
@@ -21,7 +21,7 @@ def avatar_img(avatar, size):
 
 class UploadAvatarForm(forms.Form):
 
-    avatar = forms.ImageField(label=_(u"Avatar"))
+    avatar = forms.ImageField(label=_("Avatar"))
 
     def __init__(self, *args, **kwargs):
         self.user = kwargs.pop('user')
@@ -49,11 +49,17 @@ class UploadAvatarForm(forms.Form):
             mime = magic.from_buffer(magic_buffer, mime=True)
 
             if mime not in settings.AVATAR_ALLOWED_MIMETYPES:
-                raise forms.ValidationError(
-                    _(u"File content is invalid. Detected: %(mimetype)s "
-                       "Allowed content types are: %(valid_mime_list)s") %
-                       {'valid_mime_list': ", ".join(AVATAR_ALLOWED_MIMETYPES),
-                        'mimetype': mime})
+                err = _(
+                    u"File content is invalid. Detected: %(mimetype)s "
+                    "Allowed content types are: %(valid_mime_list)s"
+                )
+
+                conf = {
+                    'valid_mime_list': ", ".join(settings.AVATAR_ALLOWED_MIMETYPES),
+                    'mimetype': mime
+                }
+
+                raise forms.ValidationError(err % conf)
 
         if settings.AVATAR_ALLOWED_FILE_EXTS:
             root, ext = os.path.splitext(data.name.lower())
diff --git a/avatar/settings.py b/avatar/settings.py
index 8f696dd..916c115 100644
--- a/avatar/settings.py
+++ b/avatar/settings.py
@@ -2,12 +2,12 @@ from django.conf import settings
 
 try:
     from PIL import Image
-    dir(Image) # Placate PyFlakes
+    dir(Image)  # Placate PyFlakes
 except ImportError:
     import Image
 
 AVATAR_DEFAULT_SIZE = getattr(settings, 'AVATAR_DEFAULT_SIZE', 80)
-AUTO_GENERATE_AVATAR_SIZES = getattr(settings, 'AUTO_GENERATE_AVATAR_SIZES', (AVATAR_DEFAULT_SIZE,))
+AVATAR_AUTO_GENERATE_SIZES = getattr(settings, 'AUTO_GENERATE_AVATAR_SIZES', (AVATAR_DEFAULT_SIZE,))
 AVATAR_RESIZE_METHOD = getattr(settings, 'AVATAR_RESIZE_METHOD', Image.ANTIALIAS)
 AVATAR_STORAGE_DIR = getattr(settings, 'AVATAR_STORAGE_DIR', 'avatars')
 AVATAR_GRAVATAR_BASE_URL = getattr(settings, 'AVATAR_GRAVATAR_BASE_URL', 'http://www.gravatar.com/avatar/')
diff --git a/avatar/views.py b/avatar/views.py
index 93c7704..328787d 100644
--- a/avatar/views.py
+++ b/avatar/views.py
@@ -72,11 +72,11 @@ def add(request, extra_context=None, next_override=None,
         if upload_avatar_form.is_valid():
             avatar = Avatar(user=request.user, primary=True)
             image_file = request.FILES['avatar']
-            
+
             filename_parts = os.path.splitext(image_file.name)
             extension = filename_parts[1]
-            filename = u'%s%s' % (unicode(uuid.uuid4()), unicode(extension))
-            
+            filename = '%s%s' % (uuid.uuid4(), extension)
+
             avatar.avatar.save(filename, image_file)
             avatar.save()
             messages.success(request, _("Successfully uploaded a new avatar."))
diff --git a/avatar/testdata/test.tiff b/tests/data/test.tiff
similarity index 100%
rename from avatar/testdata/test.tiff
rename to tests/data/test.tiff