diff --git a/awscli/customizations/codedeploy.py b/awscli/customizations/codedeploy.py
index 8cc4e1dd2e41..cdd08e9ee88b 100644
--- a/awscli/customizations/codedeploy.py
+++ b/awscli/customizations/codedeploy.py
@@ -16,10 +16,11 @@
 import os
 import zipfile
 import tempfile
-import io
 import contextlib
 from datetime import datetime
 
+import six
+
 from awscli.argprocess import unpack_cli_arg
 from awscli.arguments import CustomArgument
 from awscli.arguments import create_argument_model_from_schema
@@ -269,7 +270,7 @@ def _multipart_upload_to_s3(self, parsed_args, bundle, size_remaining):
                     key=parsed_args.key,
                     uploadId=upload_id,
                     partNumber=part_num,
-                    body=io.BytesIO(data)
+                    body=six.BytesIO(data)
                 )
                 multipart_list.append({
                     'PartNumber': part_num,
@@ -477,11 +478,10 @@ def _call(self, parsed_args, parsed_globals):
                     parsed_args.version = upload_response['VersionId']
             except Exception as e:
                 raise RuntimeError(
-                    'Failed to upload \'{0}\' to \'{1}\': {2}'.format(
-                        parsed_args.source,
-                        parsed_args.s3_location,
-                        e.message
-                    )
+                    'Failed to upload \'%s\' to \'%s\': %s' %
+                    (parsed_args.source,
+                     parsed_args.s3_location,
+                     str(e))
                 )
         self.codedeploy.register_revision(parsed_args)
 
@@ -515,7 +515,7 @@ def _call(self, parsed_args, parsed_globals):
     def _compress(self, source, ignore_hidden_files=False):
         source_path = os.path.abspath(source)
         appspec_path = os.path.sep.join([source_path, 'appspec.yml'])
-        with tempfile.TemporaryFile() as tf:
+        with tempfile.TemporaryFile('w+b') as tf:
             zf = zipfile.ZipFile(tf, 'w')
             # Using 'try'/'finally' instead of 'with' statement since ZipFile
             # does not have support context manager in Python 2.6.
diff --git a/tests/unit/customizations/test_codedeploy.py b/tests/unit/customizations/test_codedeploy.py
index 668d6a18d1f2..df2b92a3cc85 100644
--- a/tests/unit/customizations/test_codedeploy.py
+++ b/tests/unit/customizations/test_codedeploy.py
@@ -495,9 +495,7 @@ def setUp(self):
         self.version_id = '12341234-1234-1234-1234-123412341234'
         self.upload_id = 'upload_id'
         self.region = 'us-east-1'
-        self.endpoint_url = 'https://codedeploy-{}.amazonaws.com'.format(
-            self.region
-        )
+        self.endpoint_url = 'https://codedeploy-%s.amazonaws.com' % self.region
 
         self.args = argparse.Namespace()
         self.args.application_name = self.application_name
@@ -534,7 +532,7 @@ def setUp(self):
 
         self.bundle_mock = MagicMock()
         self.bundle_mock.tell.return_value = (5 << 20)
-        self.bundle_mock.read.return_value = 'a' * (5 << 20)
+        self.bundle_mock.read.return_value = b'a' * (5 << 20)
         self.bundle_mock.__enter__.return_value = self.bundle_mock
         self.bundle_mock.__exit__.return_value = None
 
@@ -585,7 +583,7 @@ def test_upload_to_s3_with_multipart_upload(self):
         self.args.bucket = self.bucket
         self.args.key = self.key
         self.bundle_mock.tell.return_value = (6 << 20)
-        self.bundle_mock.read.return_value = 'a' * (6 << 20)
+        self.bundle_mock.read.return_value = b'a' * (6 << 20)
         response = self.s3client.upload_to_s3(self.args, self.bundle_mock)
         self.assertDictEqual(self.upload_response, response)
 
@@ -613,7 +611,7 @@ def test_upload_to_s3_with_multipart_upload_aborted_on_error(self):
         self.args.bucket = self.bucket
         self.args.key = self.key
         self.bundle_mock.tell.return_value = (6 << 20)
-        self.bundle_mock.read.return_value = 'a' * (6 << 20)
+        self.bundle_mock.read.return_value = b'a' * (6 << 20)
         self.s3client.s3.UploadPart.side_effect = RuntimeError('error')
 
         with self.assertRaises(RuntimeError) as error: