diff --git a/scrapy/spidermiddlewares/stickymeta.py b/scrapy/spidermiddlewares/stickymeta.py
index 7b5524d46..b4493f9ba 100644
--- a/scrapy/spidermiddlewares/stickymeta.py
+++ b/scrapy/spidermiddlewares/stickymeta.py
@@ -16,7 +16,11 @@ class StickyMetaParamsMiddleware(object):
         self.keys_to_sticky = keys_to_sticky
 
     def process_spider_output(self, response, result, spider):
-        sticky_meta = {k: response.meta[k] for k in self.keys_to_sticky if k in response.meta}
+        sticky_meta = {
+            k: response.meta[k]
+            for k in self.keys_to_sticky
+            if k in response.meta
+        }
         for r in result:
             if not isinstance(r, Request):
                 yield r
diff --git a/tests/test_spidermiddleware_stickymeta.py b/tests/test_spidermiddleware_stickymeta.py
index b5baec1dd..64ee3796b 100644
--- a/tests/test_spidermiddleware_stickymeta.py
+++ b/tests/test_spidermiddleware_stickymeta.py
@@ -47,8 +47,9 @@ class TestStickyMetaParamsMiddleware(TestCase):
         response = Response(self.test_url, request=request)
         result = [
             Request(self.test_url),
-            MockItem(name='dummy')  # Add a item just to increase the test coverage
+            MockItem(name='dummy')
         ]
-        for result in middleware.process_spider_output(response, result, spider):
+        results = middleware.process_spider_output(response, result, spider)
+        for result in results:
             if isinstance(result, Request):
                 self.assertEqual(result.meta, {'param2': 'Stickied!'})