diff --git a/Lib/multiprocessing/__init__.py b/Lib/multiprocessing/__init__.py
index 86df6383703756..8336f381decaac 100644
--- a/Lib/multiprocessing/__init__.py
+++ b/Lib/multiprocessing/__init__.py
@@ -19,9 +19,8 @@
 # Copy stuff from default context
 #
 
-globals().update((name, getattr(context._default_context, name))
-                 for name in context._default_context.__all__)
-__all__ = context._default_context.__all__
+__all__ = [x for x in dir(context._default_context) if not x.startswith('_')]
+globals().update((name, getattr(context._default_context, name)) for name in __all__)
 
 #
 # XXX These should not really be documented or public.
diff --git a/Lib/multiprocessing/context.py b/Lib/multiprocessing/context.py
index c98ee434249037..871746b1a047b3 100644
--- a/Lib/multiprocessing/context.py
+++ b/Lib/multiprocessing/context.py
@@ -5,7 +5,7 @@
 from . import process
 from . import reduction
 
-__all__ = []            # things are copied from here to __init__.py
+__all__ = ()
 
 #
 # Exceptions
@@ -24,7 +24,7 @@ class AuthenticationError(ProcessError):
     pass
 
 #
-# Base type for contexts
+# Base type for contexts. Bound methods of an instance of this type are included in __all__ of __init__.py
 #
 
 class BaseContext(object):
@@ -261,8 +261,6 @@ def get_all_start_methods(self):
             else:
                 return ['fork', 'spawn']
 
-DefaultContext.__all__ = [x for x in dir(DefaultContext) if x[0] != '_']
-
 #
 # Context types for fixed start method
 #
diff --git a/Lib/test/_test_multiprocessing.py b/Lib/test/_test_multiprocessing.py
index 8b6bc4b23a0267..792e3d2a41a171 100644
--- a/Lib/test/_test_multiprocessing.py
+++ b/Lib/test/_test_multiprocessing.py
@@ -4573,6 +4573,12 @@ def test_empty(self):
 
         proc.join()
 
+
+class MiscTestCase(unittest.TestCase):
+    def test__all__(self):
+        # Just make sure names in blacklist are excluded
+        support.check__all__(self, multiprocessing, extra=multiprocessing.__all__,
+                             blacklist=['SUBDEBUG', 'SUBWARNING'])
 #
 # Mixins
 #