1 files changed, 4 insertions, 2 deletions
diff --git a/test/coveragetest.py b/test/coveragetest.py
index 52fde87a..bdee9185 100644
--- a/test/coveragetest.py
+++ b/test/coveragetest.py
@@ -12,11 +12,13 @@ class Tee(object):
 
     def __init__(self, *files):
         """Make a Tee that writes to all the files in `files.`"""
-        self.files = files
+        self._files = files
+        if hasattr(files[0], "encoding"):
+            self.encoding = files[0].encoding
 
     def write(self, data):
         """Write `data` to all the files."""
-        for f in self.files:
+        for f in self._files:
             f.write(data)