diff --git a/test/TEST-50-DISSECT/test.sh b/test/TEST-50-DISSECT/test.sh
index cfe97aaa2d..3882658053 100755
--- a/test/TEST-50-DISSECT/test.sh
+++ b/test/TEST-50-DISSECT/test.sh
@@ -10,6 +10,7 @@ TEST_NO_NSPAWN=1
 
 command -v mksquashfs >/dev/null 2>&1 || exit 0
 command -v veritysetup >/dev/null 2>&1 || exit 0
+command -v sfdisk >/dev/null 2>&1 || exit 0
 
 # Need loop devices for systemd-dissect
 test_create_image() {
@@ -25,9 +26,26 @@ test_create_image() {
         instmods loop =block
         instmods squashfs =squashfs
         instmods dm_verity =md
+        install_dmevent
         generate_module_dependencies
-        inst_binary mksquashfs
-        inst_binary veritysetup
+        inst_binary sfdisk
+        inst_binary losetup
+
+        BASICTOOLS=(
+            bash
+            cat
+        )
+        oldinitdir=$initdir
+        export initdir=$TESTDIR/minimal
+        mkdir -p $initdir
+        setup_basic_dirs
+        install_basic_tools
+        inst /usr/lib/os-release
+        ln -s ../usr/lib/os-release $initdir/etc/os-release
+        echo MARKER=1 >> $initdir/usr/lib/os-release
+        mksquashfs $initdir $oldinitdir/usr/share/minimal.raw
+        veritysetup format $oldinitdir/usr/share/minimal.raw $oldinitdir/usr/share/minimal.verity | grep '^Root hash:' | cut -f2 | tr -d '\n' > $oldinitdir/usr/share/minimal.roothash
+        export initdir=$oldinitdir
     )
 }
 
diff --git a/test/units/testsuite-50.sh b/test/units/testsuite-50.sh
index 9f35ffd653..8b24e4e0cd 100755
--- a/test/units/testsuite-50.sh
+++ b/test/units/testsuite-50.sh
@@ -4,27 +4,109 @@
 set -ex
 set -o pipefail
 
+cleanup()
+{
+    if [ -z "${image_dir}" ]; then
+        return
+    fi
+    rm -rf "${image_dir}"
+}
+
 cd /tmp
 
-image=$(mktemp -d -t -p /tmp tmp.XXXXXX)
-if [ -z "${image}" ] || [ ! -d "${image}" ]; then
-	echo "Could not create temporary directory with mktemp under /tmp"
-	exit 1
+image_dir="$(mktemp -d -t -p /tmp tmp.XXXXXX)"
+if [ -z "${image_dir}" ] || [ ! -d "${image_dir}" ]; then
+    echo "mktemp under /tmp failed"
+    exit 1
 fi
 
-mkdir -p ${image}/usr/lib ${image}/etc
-cp /usr/lib/os-release ${image}/usr/lib/
-cp /etc/machine-id /etc/os-release ${image}/etc/
-mksquashfs ${image} ${image}.raw
-veritysetup format ${image}.raw ${image}.verity | grep '^Root hash:' | cut -f2 | tr -d '\n' > ${image}.roothash
+trap cleanup EXIT
+
+cp /usr/share/minimal.* "${image_dir}/"
+image="${image_dir}/minimal"
+roothash="$(cat ${image}.roothash)"
 
 /usr/lib/systemd/systemd-dissect ${image}.raw | grep -q -F "Found read-only 'root' partition of type squashfs with verity"
+/usr/lib/systemd/systemd-dissect ${image}.raw | grep -q -F "MARKER=1"
 /usr/lib/systemd/systemd-dissect ${image}.raw | grep -q -F -f /usr/lib/os-release
 
 mv ${image}.verity ${image}.fooverity
 mv ${image}.roothash ${image}.foohash
-/usr/lib/systemd/systemd-dissect ${image}.raw --root-hash=`cat ${image}.foohash` --verity-data=${image}.fooverity | grep -q -F "Found read-only 'root' partition of type squashfs with verity"
-/usr/lib/systemd/systemd-dissect ${image}.raw --root-hash=`cat ${image}.foohash` --verity-data=${image}.fooverity | grep -q -F -f /usr/lib/os-release
+/usr/lib/systemd/systemd-dissect ${image}.raw --root-hash=${roothash} --verity-data=${image}.fooverity | grep -q -F "Found read-only 'root' partition of type squashfs with verity"
+/usr/lib/systemd/systemd-dissect ${image}.raw --root-hash=${roothash} --verity-data=${image}.fooverity | grep -q -F "MARKER=1"
+/usr/lib/systemd/systemd-dissect ${image}.raw --root-hash=${roothash} --verity-data=${image}.fooverity | grep -q -F -f /usr/lib/os-release
+mv ${image}.fooverity ${image}.verity
+mv ${image}.foohash ${image}.roothash
+
+mkdir -p ${image_dir}/mount
+/usr/lib/systemd/systemd-dissect --mount ${image}.raw ${image_dir}/mount
+cat ${image_dir}/mount/usr/lib/os-release | grep -q -F -f /usr/lib/os-release
+cat ${image_dir}/mount/etc/os-release | grep -q -F -f /usr/lib/os-release
+cat ${image_dir}/mount/usr/lib/os-release | grep -q -F "MARKER=1"
+umount ${image_dir}/mount
+
+systemd-run -t --property RootImage=${image}.raw /usr/bin/cat /usr/lib/os-release | grep -q -F "MARKER=1"
+mv ${image}.verity ${image}.fooverity
+mv ${image}.roothash ${image}.foohash
+systemd-run -t --property RootImage=${image}.raw --property RootHash=${image}.foohash --property RootVerity=${image}.fooverity /usr/bin/cat /usr/lib/os-release | grep -q -F "MARKER=1"
+systemd-run -t --property RootImage=${image}.raw --property RootHash=${roothash} --property RootVerity=${image}.fooverity /usr/bin/cat /usr/lib/os-release | grep -q -F "MARKER=1"
+mv ${image}.fooverity ${image}.verity
+mv ${image}.foohash ${image}.roothash
+
+# Make a GPT disk on the fly, with the squashfs as partition 1 and the verity hash tree as partition 2
+machine="$(uname -m)"
+if [ "${machine}" = "x86_64" ]; then
+    root_guid=4f68bce3-e8cd-4db1-96e7-fbcaf984b709
+    verity_guid=2c7357ed-ebd2-46d9-aec1-23d437ec2bf5
+elif [ "${machine}" = "i386" ] || [ "${machine}" = "i686" ] || [ "${machine}" = "x86" ]; then
+    root_guid=44479540-f297-41b2-9af7-d131d5f0458a
+    verity_guid=d13c5d3b-b5d1-422a-b29f-9454fdc89d76
+elif [ "${machine}" = "aarch64" ] || [ "${machine}" = "aarch64_be" ] || [ "${machine}" = "armv8b" ] || [ "${machine}" = "armv8l" ]; then
+    root_guid=b921b045-1df0-41c3-af44-4c6f280d3fae
+    verity_guid=df3300ce-d69f-4c92-978c-9bfb0f38d820
+elif [ "${machine}" = "arm" ]; then
+    root_guid=69dad710-2ce4-4e3c-b16c-21a1d49abed3
+    verity_guid=7386cdf2-203c-47a9-a498-f2ecce45a2d6
+elif [ "${machine}" = "ia64" ]; then
+    root_guid=993d8d3d-f80e-4225-855a-9daf8ed7ea97
+    verity_guid=86ed10d5-b607-45bb-8957-d350f23d0571
+fi
+# du rounds up to block size, which is more helpful for partitioning
+root_size="$(du -k ${image}.raw | cut -f1)"
+verity_size="$(du -k ${image}.verity | cut -f1)"
+# 4MB seems to be the minimum size blkid will accept, below that probing fails
+dd if=/dev/zero of=${image}.gpt bs=512 count=$((8192+${root_size}*2+${verity_size}*2))
+# sfdisk seems unhappy if the size overflows into the next unit, eg: 1580KiB will be interpreted as 1MiB
+# so do some basic rounding up if the minimal image is more than 1 MB
+if [ ${root_size} -ge 1024 ]; then
+    root_size="$((${root_size}/1024 + 1))MiB"
+else
+    root_size="${root_size}KiB"
+fi
+verity_size="${verity_size}KiB"
+uuid="$(head -c 32 ${image}.roothash | cut -c -8)-$(head -c 32 ${image}.roothash | cut -c 9-12)-$(head -c 32 ${image}.roothash | cut -c 13-16)-$(head -c 32 ${image}.roothash | cut -c 17-20)-$(head -c 32 ${image}.roothash | cut -c 21-)"
+echo -e "label: gpt\nsize=${root_size}, type=${root_guid}, uuid=${uuid}" | sfdisk ${image}.gpt
+uuid="$(tail -c 32 ${image}.roothash | cut -c -8)-$(tail -c 32 ${image}.roothash | cut -c 9-12)-$(tail -c 32 ${image}.roothash | cut -c 13-16)-$(tail -c 32 ${image}.roothash | cut -c 17-20)-$(tail -c 32 ${image}.roothash | cut -c 21-)"
+echo -e "size=${verity_size}, type=${verity_guid}, uuid=${uuid}" | sfdisk ${image}.gpt --append
+sfdisk --part-label ${image}.gpt 1 "Root Partition"
+sfdisk --part-label ${image}.gpt 2 "Verity Partition"
+loop="$(losetup --show -P -f ${image}.gpt)"
+dd if=${image}.raw of=${loop}p1
+dd if=${image}.verity of=${loop}p2
+losetup -d ${loop}
+
+/usr/lib/systemd/systemd-dissect --root-hash ${roothash} ${image}.gpt | grep -q "Found read-only 'root' partition (UUID $(head -c 32 ${image}.roothash)) of type squashfs for .* with verity on partition #1"
+/usr/lib/systemd/systemd-dissect --root-hash ${roothash} ${image}.gpt | grep -q "Found read-only 'root-verity' partition (UUID $(tail -c 32 ${image}.roothash)) of type DM_verity_hash for .* on partition #2"
+/usr/lib/systemd/systemd-dissect --root-hash ${roothash} ${image}.gpt | grep -q -F "MARKER=1"
+/usr/lib/systemd/systemd-dissect --root-hash ${roothash} ${image}.gpt | grep -q -F -f /usr/lib/os-release
+
+/usr/lib/systemd/systemd-dissect --root-hash ${roothash} --mount ${image}.gpt ${image_dir}/mount
+cat ${image_dir}/mount/usr/lib/os-release | grep -q -F -f /usr/lib/os-release
+cat ${image_dir}/mount/etc/os-release | grep -q -F -f /usr/lib/os-release
+cat ${image_dir}/mount/usr/lib/os-release | grep -q -F "MARKER=1"
+umount ${image_dir}/mount
+
+systemd-run -t --property RootImage=${image}.gpt --property RootHash=${roothash} /usr/bin/cat /usr/lib/os-release | grep -q -F "MARKER=1"
 
 echo OK > /testok