Tweaking the rw tests for bytestrings
@@ -424,7 +424,7 @@ class LengthPrefixedBlobReadWriter(ReadWriter):
def read(self, stream):
length = self._length.read(stream)
if length == 0:
- return ""
+ return b""
else:
blob = self.take(stream, length)
if not self._is_binary:
