diff --git a/Lib/test/support.py b/Lib/test/support.py
index 53c2956dd0b..f5a53ca6281 100644
--- a/Lib/test/support.py
+++ b/Lib/test/support.py
@@ -1374,7 +1374,7 @@ def strip_python_stderr(stderr):
 
 def args_from_interpreter_flags():
     """Return a list of command-line arguments reproducing the current
-    settings in sys.flags."""
+    settings in sys.flags and sys.warnoptions."""
     flag_opt_map = {
         'bytes_warning': 'b',
         'dont_write_bytecode': 'B',
@@ -1389,6 +1389,9 @@ def args_from_interpreter_flags():
         v = getattr(sys.flags, flag)
         if v > 0:
             args.append('-' + opt * v)
+        if sys.warnoptions:
+            args.append('-W')
+            args.extend(sys.warnoptions)
     return args
 
 #============================================================
diff --git a/Lib/test/test_fileinput.py b/Lib/test/test_fileinput.py
index 7afb88c7bfc..27ceaf6719c 100644
--- a/Lib/test/test_fileinput.py
+++ b/Lib/test/test_fileinput.py
@@ -277,7 +277,7 @@ class FileInputTests(unittest.TestCase):
 
     def test_empty_files_list_specified_to_constructor(self):
         with FileInput(files=[]) as fi:
-            self.assertEquals(fi._files, ('-',))
+            self.assertEqual(fi._files, ('-',))
 
     def test__getitem__(self):
         """Tests invoking FileInput.__getitem__() with the current
@@ -298,7 +298,7 @@ class FileInputTests(unittest.TestCase):
         with FileInput(files=[t]) as fi:
             with self.assertRaises(RuntimeError) as cm:
                 fi[1]
-        self.assertEquals(cm.exception.args, ("accessing lines out of order",))
+        self.assertEqual(cm.exception.args, ("accessing lines out of order",))
 
     def test__getitem__eof(self):
         """Tests invoking FileInput.__getitem__() with the line number but at
@@ -308,7 +308,7 @@ class FileInputTests(unittest.TestCase):
         with FileInput(files=[t]) as fi:
             with self.assertRaises(IndexError) as cm:
                 fi[0]
-        self.assertEquals(cm.exception.args, ("end of input reached",))
+        self.assertEqual(cm.exception.args, ("end of input reached",))
 
     def test_nextfile_oserror_deleting_backup(self):
         """Tests invoking FileInput.nextfile() when the attempt to delete
diff --git a/Misc/NEWS b/Misc/NEWS
index 168aed8635a..3ce5379a599 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,10 @@ Core and Builtins
 
 - _ast.__version__ is now a Mercurial integer and hex revision.
 
+- Issue #11432: A bug was introduced in subprocess.Popen on posix systems with
+  3.2.0 where the stdout or stderr file descriptor being the same as the stdin
+  file descriptor would raise an exception. webbrowser.open would fail. fixed.
+
 - Issue #9856: Change object.__format__ with a non-empty format string
   to be a DeprecationWarning. In 3.2 it was a PendingDeprecationWarning.
   In 3.4 it will be a TypeError.