diff --git a/tests/_live_build.pm b/tests/_live_build.pm
index bcd79dd7..7669efab 100644
--- a/tests/_live_build.pm
+++ b/tests/_live_build.pm
@@ -89,8 +89,11 @@ sub run {
     # now make the image build directory inside the mock root and put the kickstart there
     assert_script_run 'mock -r openqa --isolation=simple --chroot "mkdir -p /chroot_tmpdir"';
     assert_script_run "mock -r openqa --isolation=simple --copyin openqa.ks /chroot_tmpdir";
+    # make sure volume ID isn't too long (for multiple Koji task cases)
+    my $aot28 = substr($advortask, 0, 28);
+    my $volid = "FWL-${aot28}";
     # PULL SOME LEVERS! PULL SOME LEVERS!
-    assert_script_run "mock -r openqa --enable-network --isolation=simple --chroot \"/sbin/livemedia-creator --ks /chroot_tmpdir/openqa.ks --logfile /chroot_tmpdir/lmc-logs/livemedia-out.log --no-virt --resultdir /chroot_tmpdir/lmc --project Fedora-${subv}-Live --make-iso --volid FWL-${advortask} --iso-only --iso-name Fedora-${subv}-Live-${arch}-${advortask}.iso --releasever ${releasever} --macboot\"", 7200;
+    assert_script_run "mock -r openqa --enable-network --isolation=simple --chroot \"/sbin/livemedia-creator --ks /chroot_tmpdir/openqa.ks --logfile /chroot_tmpdir/lmc-logs/livemedia-out.log --no-virt --resultdir /chroot_tmpdir/lmc --project Fedora-${subv}-Live --make-iso --volid ${volid} --iso-only --iso-name Fedora-${subv}-Live-${arch}-${advortask}.iso --releasever ${releasever} --macboot\"", 7200;
     unless (script_run "mock -r openqa --isolation=simple --copyout /chroot_tmpdir/lmc-logs/livemedia-out.log .", 90) {
         upload_logs "livemedia-out.log";
     }