1 files changed, 4 insertions, 0 deletions
diff --git a/coverage/test_helpers.py b/coverage/test_helpers.py
index a76bed35..9649ed5d 100644
--- a/coverage/test_helpers.py
+++ b/coverage/test_helpers.py
@@ -36,6 +36,10 @@ class Tee(object):
         for f in self._files:
             f.flush()
 
+    def getvalue(self):
+        """StringIO file-likes have .getvalue()"""
+        return self._files[0].getvalue()
+
     if 0:
         # Use this if you need to use a debugger, though it makes some tests
         # fail, I'm not sure why...