> From: Colin Baxter <m43cap@yandex.com>
> Date: Wed, 29 Mar 2017 20:40:25 +0100
> Cc: , emacs-devel@gnu.org
> 
> Test tramp-test34-utf8 condition:
>     (ert-test-failed
>      ((should
>        (string-equal
> 	(funcall ... ...)
> 	(file-remote-p ... ...)))
>       :form
>       (string-equal "/tmp/tramp-test5548VYB/\316\223\317\205\317\201\316\257\317\203\317\204\316\265 \317\204\316\277 \316\223\316\261\316\273\316\261\316\276\316\257\316\261 \316\274\316\265 \316\217\317\204\316\277 \316\243\317\204\316\277\317\200" "/tmp/tramp-test5548VYB/Γυρίστε το Γαλαξία με Ώτο Στοπ")

It seems the failure comes from this snippet:

		      (should
		       (string-equal
			(funcall
			 (if quoted 'tramp-compat-file-name-quote 'identity)
			 (car (file-attributes file3)))
			(file-remote-p (file-truename file1) 'localname)))

And it's strange that the first file name in the failed condition has
got all of its bytes displayed as ASCII representation, while the
second one still has the raw bytes.

Another question is why do we see raw bytes at all here?  These should
not be unibyte strings.