diff --git a/Lib/email/test/test_email.py b/Lib/email/test/test_email.py
index 95eb0e8..7df5fcc 100644
--- a/Lib/email/test/test_email.py
+++ b/Lib/email/test/test_email.py
@@ -46,7 +46,7 @@
 
 def openfile(filename):
     path = os.path.join(os.path.dirname(landmark), 'data', filename)
-    return open(path)
+    return open(path, 'rb')
 
 
 
@@ -743,7 +743,7 @@
 class TestMIMEAudio(unittest.TestCase):
     def setUp(self):
         # In Python, audiotest.au lives in Lib/test not Lib/test/data
-        fp = open(findfile('audiotest.au'))
+        fp = open(findfile('audiotest.au'), 'rb')
         try:
             self._audiodata = fp.read()
         finally:
diff --git a/Lib/email/test/test_email_torture.py b/Lib/email/test/test_email_torture.py
index 1bff09c..76d66a9 100644
--- a/Lib/email/test/test_email_torture.py
+++ b/Lib/email/test/test_email_torture.py
@@ -22,7 +22,7 @@
 def openfile(filename):
     from os.path import join, dirname, abspath
     path = abspath(join(dirname(testfile), os.pardir, 'moredata', filename))
-    return open(path)
+    return open(path, 'rb')
 
 # Prevent this test from running in the Python distro
 try: