diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index 95c6a27..8c06d37 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -142,6 +142,7 @@ jobs:
           sudo mkdir /mnt/iso || true
           sudo mount -o loop deploy.iso /mnt/iso
           cp /mnt/iso/boot/grub2/grub.cfg grub.cfg
+          sudo umount /mnt/iso
           sed -i 's/quiet/console=ttyS0,115200n8 inst.ks=cdrom:\/ks.cfg/' grub.cfg
           sed -i 's/set default="1"/set default="0"/' grub.cfg
           sed -i 's/set timeout=60/set timeout=1/' grub.cfg
@@ -157,7 +158,7 @@ jobs:
           %include /usr/share/anaconda/interactive-defaults.ks
           EOF
           xorriso -dialog on << EOF
-          -indev base-39.iso
+          -indev deploy.iso
           -outdev test.iso
           -boot_image any replay
           -map ks.cfg ks.cfg