diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -673,6 +673,20 @@
         # to stderr at exit of subprocess.
         self.assertTrue(stderr.startswith("eline2\neline6\neline7\neline8\n"))
 
+    def test_universal_newlines_communicate_stdin_lf(self):
+        # universal newlines through communicate(), with only stdin
+        p = subprocess.Popen([sys.executable, "-c",
+                              'import sys,os;' + SETBINARY + '''\nif True:
+                                  s = sys.stdin.readline()
+                                  assert s == "line1\\n", repr(s)
+                                  s = sys.stdin.read()
+                                  assert s == "line3\\n", repr(s)
+                              '''],
+                             stdin=subprocess.PIPE,
+                             universal_newlines=1)
+        (stdout, stderr) = p.communicate("line1\r\nline3\r")
+        self.assertEqual(p.returncode, 0)
+
     def test_no_leaking(self):
         # Make sure we leak no resources
         if not mswindows: