I overlooked that one of those failure was not related to DejaGNU,
but due to the use of the GZIP environment variable which had been fixed
in commit 749468ac63042820bc3da85ece5bed64b0c15d62 [1] which will be
available in the next bug-fix release.

-- 
Mathieu Lirzin
GPG: F2A3 8D7E EB2B 6640 5761  070D 0ADE E100 9460 4D37

[1] https://git.savannah.gnu.org/cgit/automake.git/commit/?id=749468ac63042820bc3da85ece5bed64b0c15d62