diff --git a/cms/djangoapps/contentstore/views/tests/test_library.py b/cms/djangoapps/contentstore/views/tests/test_library.py
index 130db0b5ea..e658410f70 100644
--- a/cms/djangoapps/contentstore/views/tests/test_library.py
+++ b/cms/djangoapps/contentstore/views/tests/test_library.py
@@ -328,7 +328,7 @@ class UnitTestLibraries(CourseTestCase):
         response = self.client.get(manage_users_url)
         self.assertEqual(response.status_code, 200)
         # extra_user has not been assigned to the library so should not show up in the list:
-        self.assertNotIn(binary_type(extra_user.username), response.content)
+        self.assertNotIn(extra_user.username, response.content.decode('utf-8'))
 
         # Now add extra_user to the library:
         user_details_url = reverse_course_url(
@@ -341,4 +341,4 @@ class UnitTestLibraries(CourseTestCase):
         # Now extra_user should apear in the list:
         response = self.client.get(manage_users_url)
         self.assertEqual(response.status_code, 200)
-        self.assertIn(binary_type(extra_user.username), response.content)
+        self.assertIn(extra_user.username, response.content.decode('utf-8'))