diff --git a/common/lib/xmodule/xmodule/tests/__init__.py b/common/lib/xmodule/xmodule/tests/__init__.py
index a7533107cd..a1c8322616 100644
--- a/common/lib/xmodule/xmodule/tests/__init__.py
+++ b/common/lib/xmodule/xmodule/tests/__init__.py
@@ -16,7 +16,7 @@ import pprint
 import sys
 import traceback
 import unittest
-from contextlib import contextmanager, nested
+from contextlib import contextmanager
 from functools import wraps
 
 import six
diff --git a/lms/djangoapps/shoppingcart/tests/test_reports.py b/lms/djangoapps/shoppingcart/tests/test_reports.py
index 8b5a42688e..002b936926 100644
--- a/lms/djangoapps/shoppingcart/tests/test_reports.py
+++ b/lms/djangoapps/shoppingcart/tests/test_reports.py
@@ -108,11 +108,11 @@ class ReportTypeTests(ModuleStoreTestCase):
         second_refund.refund_requested_time = self.test_time
         second_refund.save()
 
-        self.CORRECT_REFUND_REPORT_CSV = dedent(b"""
+        self.CORRECT_REFUND_REPORT_CSV = dedent(u"""
             Order Number,Customer Name,Date of Original Transaction,Date of Refund,Amount of Refund,Service Fees (if any)
             3,King Bowsér,{time_str},{time_str},40.00,0.00
             4,Súsan Smith,{time_str},{time_str},40.00,0.00
-            """.format(time_str=str(self.test_time)))
+            """.format(time_str=str(self.test_time))).encode('utf-8')
 
         self.CORRECT_CERT_STATUS_CSV = dedent("""
             University,Course,Course Announce Date,Course Start Date,Course Registration Close Date,Course Registration Period,Total Enrolled,Audit Enrollment,Honor Code Enrollment,Verified Enrollment,Gross Revenue,Gross Revenue over the Minimum,Number of Verified Students Contributing More than the Minimum,Number of Refunds,Dollars Refunded