v. 4.6.20171.14978
Steps to reproduce:
1. Create autoresponse rule with METHOD part and URL check. Say "METHOD:GET regex:^https"
2. Click "Test" link at the bottom to test rule against some particular URL value
Expected: "Test URL-Mathing Expression" dialog is shown
Actual: error message is shown. Title "Untestable Expression", message "Sorry, the TEST command can only be used with Rules that evaluate the URL."
I believe this is an expected outcome of the fix for https://fiddler.ideas.aha.io/ideas/FID-I-118