diff --git a/src/_pytest/capture.py b/src/_pytest/capture.py
index faa767a8..518f5c8b 100644
--- a/src/_pytest/capture.py
+++ b/src/_pytest/capture.py
@@ -10,7 +10,7 @@ import sys
 import os
 import io
 from io import UnsupportedOperation
-from tempfile import TemporaryFile
+from tempfile import NamedTemporaryFile as TemporaryFile
 
 import six
 import pytest
@@ -471,7 +471,6 @@ class FDCaptureBinary(object):
                 else:
                     self.syscapture = NoCapture()
             self.tmpfile = tmpfile
-            self.tmpfile_fd = tmpfile.fileno()
 
     def __repr__(self):
         return "<FDCapture %s oldfd=%s>" % (self.targetfd, self.targetfd_save)
@@ -482,7 +481,6 @@ class FDCaptureBinary(object):
             os.fstat(self.targetfd_save)
         except (AttributeError, OSError):
             raise ValueError("saved filedescriptor not valid anymore")
-        os.dup2(self.tmpfile_fd, self.targetfd)
         self.syscapture.start()
 
     def snap(self):
@@ -496,18 +494,14 @@ class FDCaptureBinary(object):
         """ stop capturing, restore streams, return original capture file,
         seeked to position zero. """
         targetfd_save = self.__dict__.pop("targetfd_save")
-        os.dup2(targetfd_save, self.targetfd)
-        os.close(targetfd_save)
         self.syscapture.done()
         _attempt_to_close_capture_file(self.tmpfile)
 
     def suspend(self):
         self.syscapture.suspend()
-        os.dup2(self.targetfd_save, self.targetfd)
 
     def resume(self):
         self.syscapture.resume()
-        os.dup2(self.tmpfile_fd, self.targetfd)
 
     def writeorg(self, data):
         """ write to original file descriptor. """
diff --git a/src/_pytest/pastebin.py b/src/_pytest/pastebin.py
index 6af202d1..9b192918 100644
--- a/src/_pytest/pastebin.py
+++ b/src/_pytest/pastebin.py
@@ -29,7 +29,7 @@ def pytest_configure(config):
         # when using pytest-xdist, for example
         if tr is not None:
             # pastebin file will be utf-8 encoded binary file
-            config._pastebinfile = tempfile.TemporaryFile("w+b")
+            config._pastebinfile = tempfile.NamedTemporaryFile("w+b")
             oldwrite = tr._tw.write
 
             def tee_write(s, **kwargs):