squid url_regex not matching characters

I have a url_regex acl: ^http(s)://bitbucket.org/example/* However, it's matching the url: http(s)://bitbucket.org/example_test/* This seems to not consider the "/" at the end of ^http(s)://bitbucket.org/example/* I'd like to match anything with subfolder matching example. Eg: bitbucket.org/example/case_1 bitbucket.org/example/case_2 But not, bitbucket.org/example_bad/case_3 It seems like a special blend of regex and its not considering the "/" – Can anyone see what is wrong here ?