not only meta layer should be handled properly. All test related files under ./conf/test/ folder of every layer should be handled for export test.
This should export conf/test folder also: http://git.yoctoproject.org/cgit/cgit.cgi/poky-contrib/commit/?h=lucian/exportedtests&id=c739b1781a6ea866aaed2bd838760119751e4d66
Assigning to Costin
Cathy, has this been implemented?
Cathy, Please see the above question
Is is still a thing in the current context of master?
There don't seem to be any people who care about this.