MLMMJ 1.5.0-1+removetests upload to experimental is for testing the
new upstream stable version while removing the post-build tests which have
proven to be unreliable. Starting with MLMMJ 1.4.0 upstream uses atf-sh and
kyua for post-build tests after the compile completes. The prior upload of
1.5.0-1 to Debian passed these post-build tests on some architectures and
failed others, and passed on amd64 after upload and then failed on amd64
during the reproducibile builds test.

MLMMJ 1.5.0-1+replacetests upload to experimental is to test that the package
build still functions after patching the code for the post-test failures