diff --git a/openedx/core/djangoapps/contentserver/middleware.py b/openedx/core/djangoapps/contentserver/middleware.py
index 5dec3f00063b3b2380040f614f9a4c4153086fff..88f392462dab28db74ed8ba093d72af46012bff7 100644
--- a/openedx/core/djangoapps/contentserver/middleware.py
+++ b/openedx/core/djangoapps/contentserver/middleware.py
@@ -156,7 +156,7 @@ class StaticContentServer(object):
                         if 0 <= first <= last < content.length:
                             # If the byte range is satisfiable
                             response = HttpResponse(content.stream_data_in_range(first, last))
-                            response['Content-Range'] = b'bytes {first}-{last}/{length}'.format(
+                            response['Content-Range'] = u'bytes {first}-{last}/{length}'.format(
                                 first=first, last=last, length=content.length
                             )
                             response['Content-Length'] = str(last - first + 1)
diff --git a/openedx/core/djangoapps/contentserver/test/test_contentserver.py b/openedx/core/djangoapps/contentserver/test/test_contentserver.py
index 5c111bbdc9715c8ca46676fc03cd535b7069d14a..3d892ec6684c9e23daeb6b54d4cc92cd2497bee5 100644
--- a/openedx/core/djangoapps/contentserver/test/test_contentserver.py
+++ b/openedx/core/djangoapps/contentserver/test/test_contentserver.py
@@ -218,13 +218,8 @@ class ContentStoreToyCourseTest(SharedModuleStoreTestCase):
         resp = self.client.get(self.url_unlocked, HTTP_RANGE='bytes=0-')
 
         self.assertEqual(resp.status_code, 206)  # HTTP_206_PARTIAL_CONTENT
-        self.assertEqual(
-            resp['Content-Range'],
-            b'bytes {first}-{last}/{length}'.format(
-                first=0, last=self.length_unlocked - 1,
-                length=self.length_unlocked
-            )
-        )
+        self.assertEqual(resp['Content-Range'], u'bytes {first}-{last}/{length}'
+                         .format(first=0, last=self.length_unlocked - 1, length=self.length_unlocked))
         self.assertEqual(resp['Content-Length'], str(self.length_unlocked))
 
     def test_range_request_partial_file(self):
@@ -233,13 +228,13 @@ class ContentStoreToyCourseTest(SharedModuleStoreTestCase):
         outputs partial content status code and valid Content-Range and Content-Length.
         first_byte and last_byte are chosen to be simple but non trivial values.
         """
-        first_byte = self.length_unlocked / 4
-        last_byte = self.length_unlocked / 2
+        first_byte = self.length_unlocked // 4
+        last_byte = self.length_unlocked // 2
         resp = self.client.get(self.url_unlocked, HTTP_RANGE='bytes={first}-{last}'.format(
             first=first_byte, last=last_byte))
 
         self.assertEqual(resp.status_code, 206)  # HTTP_206_PARTIAL_CONTENT
-        self.assertEqual(resp['Content-Range'], b'bytes {first}-{last}/{length}'.format(
+        self.assertEqual(resp['Content-Range'], u'bytes {first}-{last}/{length}'.format(
             first=first_byte, last=last_byte, length=self.length_unlocked))
         self.assertEqual(resp['Content-Length'], str(last_byte - first_byte + 1))