#2683: Popen.communicate() argument must be bytes.
diff --git a/Lib/test/test_subprocess.py b/Lib/test/test_subprocess.py
index 71ae0db..fe916c2 100644
--- a/Lib/test/test_subprocess.py
+++ b/Lib/test/test_subprocess.py
@@ -302,7 +302,7 @@
                              stdin=subprocess.PIPE,
                              stdout=subprocess.PIPE,
                              stderr=subprocess.PIPE)
-        (stdout, stderr) = p.communicate("banana")
+        (stdout, stderr) = p.communicate(b"banana")
         self.assertEqual(stdout, b"banana")
         self.assertEqual(remove_stderr_debug_decorations(stderr),
                          b"pineapple")
@@ -420,7 +420,7 @@
                                  stdin=subprocess.PIPE,
                                  stdout=subprocess.PIPE,
                                  stderr=subprocess.PIPE)
-            data = p.communicate("lime")[0]
+            data = p.communicate(b"lime")[0]
             self.assertEqual(data, b"lime")