diff --git a/pulsar/client/path_mapper.py b/pulsar/client/path_mapper.py
index c3a3d58bb2ee5d3753ac0c338085ada242a57cf1..3383ed3985204ce1ca13df750526c103a081dff5 100644
--- a/pulsar/client/path_mapper.py
+++ b/pulsar/client/path_mapper.py
@@ -100,4 +100,4 @@ class PathMapper(object):
             raise Exception(message)
 
 
-__all__ = ('PathMapper')
+__all__ = ('PathMapper',)
diff --git a/pulsar/client/staging/down.py b/pulsar/client/staging/down.py
index 96e606f33baa3f99f5bbc02fa35d58ef8964ae6f..d6aad82bdf66b8e9802fd3ca25aa31d1ab057867 100644
--- a/pulsar/client/staging/down.py
+++ b/pulsar/client/staging/down.py
@@ -174,4 +174,4 @@ def _clean(collection_failure_exceptions, cleanup_job, client):
             log.warn("Failed to cleanup remote Pulsar job")
 
 
-__all__ = ('finish_job')
+__all__ = ('finish_job',)
diff --git a/pulsar/managers/base/base_drmaa.py b/pulsar/managers/base/base_drmaa.py
index 2f6fedd1798c8983b203bb693d5de58850d13ad1..cbd27dcaec873b8336c34779de135d4993711fbe 100644
--- a/pulsar/managers/base/base_drmaa.py
+++ b/pulsar/managers/base/base_drmaa.py
@@ -78,4 +78,4 @@ class BaseDrmaaManager(ExternalBaseManager):
         return attributes
 
 
-__all__ = ("BaseDrmaaManager")
+__all__ = ("BaseDrmaaManager",)
diff --git a/pulsar/managers/staging/post.py b/pulsar/managers/staging/post.py
index 7991a370bfb05fbeb992150154e41c0fdc875e47..441c615f2a2570f5db3752b38ff10409a77a56e7 100644
--- a/pulsar/managers/staging/post.py
+++ b/pulsar/managers/staging/post.py
@@ -70,4 +70,4 @@ def __pulsar_outputs(job_directory):
     )
 
 
-__all__ = ('postprocess')
+__all__ = ('postprocess',)
diff --git a/pulsar/managers/staging/pre.py b/pulsar/managers/staging/pre.py
index 5469615f09550afda5cec8a1e578d49c34b41e97..df3175ae89d376c19cb7fafd9c1785c3a6ccba60 100644
--- a/pulsar/managers/staging/pre.py
+++ b/pulsar/managers/staging/pre.py
@@ -17,4 +17,4 @@ def preprocess(job_directory, setup_actions, action_executor):
         action_executor.execute(lambda: action.write_to_path(path), "action[%s]" % description)
 
 
-__all__ = ('preprocess')
+__all__ = ('preprocess',)
diff --git a/pulsar/managers/stateful.py b/pulsar/managers/stateful.py
index c16e34c54cdb76886fef4f9215ff04d2bb3c00c9..2666673d0b0a361e75b6c53236c84243bd561000 100644
--- a/pulsar/managers/stateful.py
+++ b/pulsar/managers/stateful.py
@@ -306,4 +306,4 @@ def new_thread_for_manager(manager, name, target, daemon):
     return thread
 
 
-__all__ = ('StatefulManagerProxy')
+__all__ = ('StatefulManagerProxy',)
diff --git a/pulsar/tools/authorization.py b/pulsar/tools/authorization.py
index 74cb967e43992c365fe496d5dbd599e68ad2a3de..4b643eb75b63253cb9002fd10b46914f9174e8d4 100644
--- a/pulsar/tools/authorization.py
+++ b/pulsar/tools/authorization.py
@@ -88,4 +88,4 @@ def get_authorizer(toolbox):
     return authorizer
 
 
-__all__ = ('get_authorizer')
+__all__ = ('get_authorizer',)