diff --git a/swift/common/wsgi.py b/swift/common/wsgi.py
index 7cce7f98b4..6f0f600f54 100644
--- a/swift/common/wsgi.py
+++ b/swift/common/wsgi.py
@@ -430,6 +430,7 @@ class SwiftHttpProtocol(wsgi.HttpProtocol):
 
         # for py3:
         def get_default_type(self):
+            '''If the client didn't provide a content type, leave it blank.'''
             return ''
 
 
diff --git a/tox.ini b/tox.ini
index 9e2e489b59..b649a46458 100644
--- a/tox.ini
+++ b/tox.ini
@@ -142,7 +142,7 @@ setenv = SWIFT_TEST_IN_PROCESS=1
 commands = {posargs}
 
 [testenv:docs]
-basepython = python2.7
+basepython = python3
 deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html