diff --git a/assetkit/cachefiles/backends.py b/assetkit/cachefiles/backends.py
index 89a9b58..454f7cc 100644
--- a/assetkit/cachefiles/backends.py
+++ b/assetkit/cachefiles/backends.py
@@ -145,4 +145,5 @@ class Auto(BaseAsync):
     A backend that decides between immediately generating a variant
     or queuing with celery, depending on media type, file size and
     encoding.
-    """
\ No newline at end of file
+    """
+    pass
diff --git a/assetkit/models/assets.py b/assetkit/models/assets.py
index 4c6560e..d020b9c 100644
--- a/assetkit/models/assets.py
+++ b/assetkit/models/assets.py
@@ -88,4 +88,4 @@ class MediaAsset(models.Model):
         'media/0/reference.png'
         >>> m.media_handler.thumbnail
         """
-
+        pass
diff --git a/assetkit/specs/__init__.py b/assetkit/specs/__init__.py
index 8d79f1e..61b9195 100644
--- a/assetkit/specs/__init__.py
+++ b/assetkit/specs/__init__.py
@@ -24,7 +24,8 @@ class UniversalThumbnail(ImageSpec):
         if instance.media_type in self.not_applicable_types:
             raise ConversionNotApplicable
 
-        if instance.media_type ==
+        if instance.media_type == 1:
+            pass
 
         processors = self.base_conversion_map[instance.media_type]
 
diff --git a/assetkit/tests.py b/assetkit/tests.py
index 3863ec3..e69de29 100644
--- a/assetkit/tests.py
+++ b/assetkit/tests.py
@@ -1,3 +0,0 @@
-
-
-class
\ No newline at end of file