"They continue to offer holidaymakers limited financial protection if their holiday is disrupted by changing travel restrictions or being told to self isolate," the consumer body claimed in a Tweet.
The group also slammed the UK government for "taking nearly half a year" to audit its list of private PCR travel test providers.
It said it was "inexcusable" some providers still included on Gov.uk no longer exist and others have continued to advertise "misleading prices".
