diff --git a/sdks/python/apache_beam/portability/__init__.py b/sdks/python/apache_beam/portability/__init__.py
index 0bce5d68f724..9fbf21557df7 100644
--- a/sdks/python/apache_beam/portability/__init__.py
+++ b/sdks/python/apache_beam/portability/__init__.py
@@ -16,3 +16,4 @@
 #
 
 """For internal use only; no backwards-compatibility guarantees."""
+from __future__ import absolute_import
diff --git a/sdks/python/apache_beam/portability/common_urns.py b/sdks/python/apache_beam/portability/common_urns.py
index 5e81aa8be645..c2a79cce12a1 100644
--- a/sdks/python/apache_beam/portability/common_urns.py
+++ b/sdks/python/apache_beam/portability/common_urns.py
@@ -17,6 +17,10 @@
 
 """ Accessors for URNs of common Beam entities. """
 
+from __future__ import absolute_import
+
+from builtins import object
+
 from apache_beam.portability.api import beam_runner_api_pb2
 from apache_beam.portability.api import standard_window_fns_pb2
 
diff --git a/sdks/python/tox.ini b/sdks/python/tox.ini
index 18ed8d6761b5..697e69e5d315 100644
--- a/sdks/python/tox.ini
+++ b/sdks/python/tox.ini
@@ -100,6 +100,7 @@ deps =
   flake8==3.5.0
 modules =
   apache_beam/coders
+  apache_beam/portability
   apache_beam/internal
   apache_beam/metrics
   apache_beam/options