diff --git a/.coveragerc b/.coveragerc
index 8a533f7e4e55..debd4e071b6e 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1,8 +1,10 @@
 [run]
 include =
+    appengine/*
+    bigquery/*
     datastore/*
     localtesting/*
-    bigquery/*
+    storage/*
 [report]
 exclude_lines =
     pragma: NO COVER
diff --git a/README.md b/README.md
index 266846a0d035..a5c2ad08e103 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,12 @@ Google Cloud SDK installation path.
     $ export TEST_BUCKET_NAME={YOUR_BUCKET_NAME}
     $ tox
 
+## Adding new tests
+
+Common testing utilities are located under ``tests``.
+
+When adding a new directory, be sure to edit ``.coveragerc`` to include it in coveralls.
+
 ## Licensing
 
 * See [LICENSE](LICENSE)
diff --git a/bigquery/samples/utils.py b/bigquery/samples/utils.py
index a9d70e93a5b4..dd7a3900cbcd 100644
--- a/bigquery/samples/utils.py
+++ b/bigquery/samples/utils.py
@@ -19,8 +19,9 @@ def get_service():
     from oauth2client.client import GoogleCredentials
     credentials = GoogleCredentials.get_application_default()
     if credentials.create_scoped_required():
-        credentials = credentials.create_scoped('https://www.googleapis.com/auth/bigquery')
-    return build('bigquery','v2', credentials=GoogleCredentials.get_application_default())
+        credentials = credentials.create_scoped(
+            'https://www.googleapis.com/auth/bigquery')
+    return build('bigquery', 'v2', credentials=credentials)
 # [END get_service]
 
 
diff --git a/bigquery/tests/test_async_query.py b/bigquery/tests/test_async_query.py
index 52498d34544a..412f13af5d60 100644
--- a/bigquery/tests/test_async_query.py
+++ b/bigquery/tests/test_async_query.py
@@ -15,11 +15,12 @@
 import os
 import unittest
 
-from bigquery.samples.async_query import run, main
-from tests import CloudBaseTest, mock_raw_input, BUCKET_NAME_ENV, \
-    PROJECT_ID_ENV
+from bigquery.samples.async_query import main, run
 
-class TestAsyncQuery(CloudBaseTest):
+import tests
+
+
+class TestAsyncQuery(tests.CloudBaseTest):
 
     def test_async_query(self):
         for result in run(self.constants['projectId'],
@@ -30,14 +31,14 @@ def test_async_query(self):
             self.assertIsNotNone(json.loads(result))
 
 
-class TestAsyncRunner(CloudBaseTest):
+class TestAsyncRunner(tests.CloudBaseTest):
 
     def test_async_query_runner(self):
-        test_bucket_name = os.environ.get(BUCKET_NAME_ENV)
-        test_project_id = os.environ.get(PROJECT_ID_ENV)
+        test_bucket_name = os.environ.get(tests.BUCKET_NAME_ENV)
+        test_project_id = os.environ.get(tests.PROJECT_ID_ENV)
         answers = [test_bucket_name, test_project_id, 'n',
                    '1', '1']
-        with mock_raw_input(answers):
+        with tests.mock_raw_input(answers):
             main()
 
 
diff --git a/datastore/ndb/modeling/tests/test_structured_property_models.py b/datastore/ndb/modeling/tests/test_structured_property_models.py
index d894cb185d0d..92c6706cf4e5 100644
--- a/datastore/ndb/modeling/tests/test_structured_property_models.py
+++ b/datastore/ndb/modeling/tests/test_structured_property_models.py
@@ -16,7 +16,7 @@
 
 from datastore.ndb.modeling import structured_property_models as models
 
-from tests import  DatastoreTestbedCase
+from tests import DatastoreTestbedCase
 
 
 class ContactTestCase(DatastoreTestbedCase):
diff --git a/discoverydoccaching/discovery_doc.py b/discoverydoccaching/discovery_doc.py
index 2b3c1509e564..210848358e73 100644
--- a/discoverydoccaching/discovery_doc.py
+++ b/discoverydoccaching/discovery_doc.py
@@ -27,6 +27,7 @@
 RESOURCE_PATH = '..'  # look for discovery docs in the parent folder
 MAX_AGE = 86400  # update discovery docs older than a day
 
+
 def build_and_update(api, version, scopes=None):
     from oauth2client.client import GoogleCredentials
     from googleapiclient.discovery import build_from_document
diff --git a/tests/__init__.py b/tests/__init__.py
index 6e173362057a..b706ae802f62 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -15,10 +15,10 @@
 Common testing utilities between samples
 """
 
+import __builtin__
 import json
 import os
 import unittest
-import __builtin__
 
 from google.appengine.datastore import datastore_stub_util
 from google.appengine.ext import testbed
@@ -81,6 +81,7 @@ def setUp(self):
     def tearDown(self):
         os.environ['SERVER_SOFTWARE'] = self._server_software_org
 
+
 class DatastoreTestbedCase(unittest.TestCase):
     """A base test case for common setup/teardown tasks for test."""
     def setUp(self):