diff -up coverage-4.0a5/coverage/annotate.py.orig coverage-4.0a5/coverage/annotate.py
--- coverage-4.0a5/coverage/annotate.py.orig	2015-03-25 10:33:54.569942923 -0400
+++ coverage-4.0a5/coverage/annotate.py	2015-03-25 10:34:22.775668752 -0400
@@ -89,4 +89,4 @@ class AnnotateReporter(Reporter):
                     dest.write('> ')
                 else:
                     dest.write('! ')
-                dest.write(line)
+                dest.write(line.encode('utf-8'))