diff --git a/exa/cms/editors/tests/test_editor.py b/exa/cms/editors/tests/test_editor.py
index <HASH>..<HASH> 100644
--- a/exa/cms/editors/tests/test_editor.py
+++ b/exa/cms/editors/tests/test_editor.py
@@ -9,7 +9,7 @@ related functions.
 """
 import shutil
 import os, gzip, bz2
-from io import StringIO
+from io import StringIO, open
 from uuid import uuid4
 from exa._config import config
 from exa.tester import UnitTester
Overwrite py2 open with io.open