# ensure the update fails
# useful for debugging to add "-o Debug::pkgAcquire::auth=true"
msgtest 'apt-get update for should fail with the modified' 'InRelease'
-aptget update 2>&1 | grep -q 'Hash Sum mismatch' > /dev/null && msgpass || msgfail
+aptget update 2>&1 | grep -E -q '(Writing more data than expected|Hash Sum mismatch)' > /dev/null && msgpass || msgfail
# ensure there is no package
testequal 'Reading package lists...