Regular expressions in header matching

[scottillogical]

Is there a way we can more loosely define he header matching? In one environment everything is fine, but in another I am seeing errors like:
Invalid response header Content-Type: expected "application/json; charset=utf-8" but received "application/json;charset=utf-8"
Invalid response header Vary: expected "Origin" but received "Origin, Accept-Encoding"

Is there a way to make this less strict, or do I just have to remove the expectation?