diff --git a/test/cases/ostree-ami-image.sh b/test/cases/ostree-ami-image.sh
index b27a88d8703..13e55eb9e1f 100755
--- a/test/cases/ostree-ami-image.sh
+++ b/test/cases/ostree-ami-image.sh
@@ -73,6 +73,7 @@ OSTREE_OSNAME=rhel-edge
 BUCKET_NAME="composer-ci-${TEST_UUID}"
 BUCKET_URL="s3://${BUCKET_NAME}"
 OBJECT_URL="http://${BUCKET_NAME}.s3.${AWS_DEFAULT_REGION}.amazonaws.com"
+CUSTOM_FS_LVS="false"
 
 # Set up temporary files.
 TEMPDIR=$(mktemp -d)
@@ -100,10 +101,12 @@ case "${ID}-${VERSION_ID}" in
     "rhel-9."*)
         OSTREE_REF="rhel/9/${ARCH}/edge"
         SYSROOT_RO="true"
+        CUSTOM_FS_LVS="true"
         ;;
     "centos-9")
         OSTREE_REF="centos/9/${ARCH}/edge"
         SYSROOT_RO="true"
+        CUSTOM_FS_LVS="true"
         ;;
     *)
         redprint "unsupported distro: ${ID}-${VERSION_ID}"
@@ -615,6 +618,20 @@ groups = ["wheel"]
 url = "${OBJECT_URL}/config.ign"
 EOF
 
+if [[ "${CUSTOM_FS_LVS}" == "true" ]]; then
+    tee -a "$BLUEPRINT_FILE" > /dev/null << EOF
+[[customizations.filesystem]]
+mountpoint = "/foo/bar"
+size=2147483648
+[[customizations.filesystem]]
+mountpoint = "/foo"
+size=8589934592
+[[customizations.filesystem]]
+mountpoint = "/var/myfiles"
+size= "1 GiB"
+EOF
+fi
+
 greenprint "📄 aws ami blueprint"
 cat "$BLUEPRINT_FILE"
 
@@ -884,6 +901,7 @@ sudo ansible-playbook -v -i "${TEMPDIR}"/inventory \
     -e ostree_commit="${INSTALL_HASH}" \
     -e sysroot_ro="$SYSROOT_RO" \
     -e fips="${FIPS}" \
+    -e custom_fs_lvs="${CUSTOM_FS_LVS}" \
     /usr/share/tests/osbuild-composer/ansible/check_ostree.yaml || RESULTS=0
 check_result
 
@@ -1062,6 +1080,7 @@ sudo ansible-playbook -v -i "${TEMPDIR}"/inventory \
     -e ostree_commit="${UPGRADE_HASH}" \
     -e sysroot_ro="$SYSROOT_RO" \
     -e fips="${FIPS}" \
+    -e custom_fs_lvs="${CUSTOM_FS_LVS}" \
     /usr/share/tests/osbuild-composer/ansible/check_ostree.yaml || RESULTS=0
 check_result
 
diff --git a/test/cases/ostree-raw-image.sh b/test/cases/ostree-raw-image.sh
index d1187e007d0..a08a80ac1d2 100755
--- a/test/cases/ostree-raw-image.sh
+++ b/test/cases/ostree-raw-image.sh
@@ -103,6 +103,7 @@ KERNEL_RT_PKG="kernel-rt"
 # Set up variables.
 SYSROOT_RO="false"
 CUSTOM_DIRS_FILES="false"
+CUSTOM_FS_LVS="false"
 
 # Set FIPS variable default
 FIPS="${FIPS:-false}"
@@ -121,6 +122,7 @@ case "${ID}-${VERSION_ID}" in
         PARENT_REF="rhel/9/${ARCH}/edge"
         OS_VARIANT="rhel9-unknown"
         SYSROOT_RO="true"
+        CUSTOM_FS_LVS="true"
         ;;
     "centos-8")
         OSTREE_REF="centos/8/${ARCH}/edge"
@@ -134,6 +136,7 @@ case "${ID}-${VERSION_ID}" in
         OS_VARIANT="centos-stream9"
         BOOT_ARGS="uefi,firmware.feature0.name=secure-boot,firmware.feature0.enabled=no"
         SYSROOT_RO="true"
+        CUSTOM_FS_LVS="true"
         ;;
     "fedora-"*)
         CONTAINER_TYPE=iot-container
@@ -475,6 +478,22 @@ enabled = ["custom.service"]
 EOF
 fi
 
+if [[ "${CUSTOM_FS_LVS}" == "true" ]]; then
+    tee -a "$BLUEPRINT_FILE" > /dev/null << EOF
+[[customizations.filesystem]]
+mountpoint = "/foo/bar"
+size=2147483648
+
+[[customizations.filesystem]]
+mountpoint = "/foo"
+size=8589934592
+
+[[customizations.filesystem]]
+mountpoint = "/var/myfiles"
+size= "1 GiB"
+EOF
+fi
+
 greenprint "📄 raw image blueprint"
 cat "$BLUEPRINT_FILE"
 
@@ -587,6 +606,7 @@ EOF
         -e sysroot_ro="$SYSROOT_RO" \
         -e test_custom_dirs_files="$CUSTOM_DIRS_FILES" \
         -e fips="${FIPS}" \
+        -e custom_fs_lvs="${CUSTOM_FS_LVS}" \
         /usr/share/tests/osbuild-composer/ansible/check_ostree.yaml || RESULTS=0
     check_result
 
@@ -755,6 +775,7 @@ EOF
         -e sysroot_ro="$SYSROOT_RO" \
         -e test_custom_dirs_files="$CUSTOM_DIRS_FILES" \
         -e fips="${FIPS}" \
+        -e custom_fs_lvs="${CUSTOM_FS_LVS}" \
         /usr/share/tests/osbuild-composer/ansible/check_ostree.yaml || RESULTS=0
 
     check_result
@@ -861,6 +882,7 @@ sudo ansible-playbook -v -i "${TEMPDIR}"/inventory \
     -e sysroot_ro="$SYSROOT_RO" \
     -e test_custom_dirs_files="$CUSTOM_DIRS_FILES" \
     -e fips="${FIPS}" \
+    -e custom_fs_lvs="${CUSTOM_FS_LVS}" \
     /usr/share/tests/osbuild-composer/ansible/check_ostree.yaml || RESULTS=0
 check_result
 
@@ -1053,6 +1075,7 @@ sudo ansible-playbook -v -i "${TEMPDIR}"/inventory \
     -e sysroot_ro="$SYSROOT_RO" \
     -e test_custom_dirs_files="$CUSTOM_DIRS_FILES" \
     -e fips="${FIPS}" \
+    -e custom_fs_lvs="${CUSTOM_FS_LVS}" \
     /usr/share/tests/osbuild-composer/ansible/check_ostree.yaml || RESULTS=0
 check_result
 
diff --git a/test/cases/ostree-simplified-installer.sh b/test/cases/ostree-simplified-installer.sh
index 80805ae5ade..9c2cb111a1f 100755
--- a/test/cases/ostree-simplified-installer.sh
+++ b/test/cases/ostree-simplified-installer.sh
@@ -115,6 +115,7 @@ INSTALLER_FILENAME=simplified-installer.iso
 MEMORY=2048
 BOOT_ARGS="uefi"
 # REF_PREFIX="rhel-edge"
+CUSTOM_FS_LVS="false"
 
 # Set up temporary files.
 TEMPDIR=$(mktemp -d)
@@ -155,6 +156,7 @@ case "${ID}-${VERSION_ID}" in
         SYSROOT_RO="true"
         ANSIBLE_USER=fdouser
         FDO_USER_ONBOARDING="true"
+        CUSTOM_FS_LVS="true"
         # workaround selinux bug https://bugzilla.redhat.com/show_bug.cgi?id=2026795
         sudo setenforce 0
         getenforce
@@ -173,6 +175,7 @@ case "${ID}-${VERSION_ID}" in
         SYSROOT_RO="true"
         ANSIBLE_USER=fdouser
         FDO_USER_ONBOARDING="true"
+        CUSTOM_FS_LVS="true"
         # workaround selinux bug https://bugzilla.redhat.com/show_bug.cgi?id=2026795
         sudo setenforce 0
         getenforce
@@ -469,6 +472,20 @@ fips = ${FIPS}
 EOF
 fi
 
+if [[ "${CUSTOM_FS_LVS}" == "true" ]]; then
+    tee -a "$BLUEPRINT_FILE" > /dev/null << EOF
+[[customizations.filesystem]]
+mountpoint = "/foo/bar"
+size=2147483648
+[[customizations.filesystem]]
+mountpoint = "/foo"
+size=8589934592
+[[customizations.filesystem]]
+mountpoint = "/var/myfiles"
+size= "1 GiB"
+EOF
+fi
+
 greenprint "📄 simplified_iso_without_fdo blueprint"
 cat "$BLUEPRINT_FILE"
 
@@ -575,6 +592,7 @@ sudo ansible-playbook -v -i "${TEMPDIR}"/inventory \
     -e fdo_credential="false" \
     -e sysroot_ro="$SYSROOT_RO" \
     -e fips="${FIPS}" \
+    -e custom_fs_lvs="${CUSTOM_FS_LVS}" \
     /usr/share/tests/osbuild-composer/ansible/check_ostree.yaml || RESULTS=0
 check_result
 
@@ -636,6 +654,19 @@ append = "enforcing=0"
 EOF
 fi
 
+if [[ "${CUSTOM_FS_LVS}" == "true" ]]; then
+    tee -a "$BLUEPRINT_FILE" > /dev/null << EOF
+[[customizations.filesystem]]
+mountpoint = "/foo/bar"
+size=2147483648
+[[customizations.filesystem]]
+mountpoint = "/foo"
+size=8589934592
+[[customizations.filesystem]]
+mountpoint = "/var/myfiles"
+size= "1 GiB"
+EOF
+fi
 
 greenprint "📄 installer blueprint"
 cat "$BLUEPRINT_FILE"
@@ -764,6 +795,7 @@ sudo ansible-playbook -v -i "${TEMPDIR}"/inventory \
     -e sysroot_ro="$SYSROOT_RO" \
     -e mfg_guest_int_name="${MFG_GUEST_INT_NAME}" \
     -e fips="${FIPS}" \
+    -e custom_fs_lvs="${CUSTOM_FS_LVS}" \
     /usr/share/tests/osbuild-composer/ansible/check_ostree.yaml || RESULTS=0
 check_result
 
@@ -821,6 +853,20 @@ append = "enforcing=0"
 EOF
 fi
 
+if [[ "${CUSTOM_FS_LVS}" == "true" ]]; then
+    tee -a "$BLUEPRINT_FILE" > /dev/null << EOF
+[[customizations.filesystem]]
+mountpoint = "/foo/bar"
+size=2147483648
+[[customizations.filesystem]]
+mountpoint = "/foo"
+size=8589934592
+[[customizations.filesystem]]
+mountpoint = "/var/myfiles"
+size= "1 GiB"
+EOF
+fi
+
 greenprint "📄 fdosshkey blueprint"
 cat "$BLUEPRINT_FILE"
 
@@ -950,6 +996,7 @@ sudo ansible-playbook -v -i "${TEMPDIR}"/inventory \
     -e sysroot_ro="$SYSROOT_RO" \
     -e mfg_guest_int_name="${MFG_GUEST_INT_NAME}" \
     -e fips="${FIPS}" \
+    -e custom_fs_lvs="${CUSTOM_FS_LVS}" \
     /usr/share/tests/osbuild-composer/ansible/check_ostree.yaml || RESULTS=0
 check_result
 
@@ -1006,6 +1053,20 @@ append = "enforcing=0"
 EOF
 fi
 
+if [[ "${CUSTOM_FS_LVS}" == "true" ]]; then
+    tee -a "$BLUEPRINT_FILE" > /dev/null << EOF
+[[customizations.filesystem]]
+mountpoint = "/foo/bar"
+size=2147483648
+[[customizations.filesystem]]
+mountpoint = "/foo"
+size=8589934592
+[[customizations.filesystem]]
+mountpoint = "/var/myfiles"
+size= "1 GiB"
+EOF
+fi
+
 greenprint "📄 fdosshkey blueprint"
 cat "$BLUEPRINT_FILE"
 
@@ -1116,6 +1177,7 @@ sudo ansible-playbook -v -i "${TEMPDIR}"/inventory \
     -e sysroot_ro="$SYSROOT_RO" \
     -e mfg_guest_int_name="${MFG_GUEST_INT_NAME}" \
     -e fips="${FIPS}" \
+    -e custom_fs_lvs="${CUSTOM_FS_LVS}" \
     /usr/share/tests/osbuild-composer/ansible/check_ostree.yaml || RESULTS=0
 check_result
 
@@ -1259,6 +1321,7 @@ sudo ansible-playbook -v -i "${TEMPDIR}"/inventory \
     -e sysroot_ro="$SYSROOT_RO" \
     -e mfg_guest_int_name="${MFG_GUEST_INT_NAME}" \
     -e fips="${FIPS}" \
+    -e custom_fs_lvs="${CUSTOM_FS_LVS}" \
     /usr/share/tests/osbuild-composer/ansible/check_ostree.yaml || RESULTS=0
 
 check_result
diff --git a/test/cases/ostree-vsphere.sh b/test/cases/ostree-vsphere.sh
index 959ea17da0e..8886967ba32 100755
--- a/test/cases/ostree-vsphere.sh
+++ b/test/cases/ostree-vsphere.sh
@@ -80,6 +80,7 @@ CONTAINER_TYPE=edge-container
 CONTAINER_FILENAME=container.tar
 VSPHERE_IMAGE_TYPE=edge-vsphere
 VSPHERE_FILENAME=image.vmdk
+CUSTOM_FS_LVS="false"
 
 # Set up temporary files.
 TEMPDIR=$(mktemp -d)
@@ -118,10 +119,12 @@ case "${ID}-${VERSION_ID}" in
     "rhel-9"* )
         OSTREE_REF="rhel/9/${ARCH}/edge"
         GUEST_ID_DC70="rhel9_64Guest"
+        CUSTOM_FS_LVS="true"
         ;;
     "centos-9")
         OSTREE_REF="centos/9/${ARCH}/edge"
         GUEST_ID_DC70="centos9_64Guest"
+        CUSTOM_FS_LVS="true"
         ;;
     *)
         echo "unsupported distro: ${ID}-${VERSION_ID}"
@@ -460,6 +463,20 @@ groups = ["wheel"]
 url = "${IGNITION_SERVER_URL}/config.ign"
 EOF
 
+if [[ "${CUSTOM_FS_LVS}" == "true" ]]; then
+    tee -a "$BLUEPRINT_FILE" > /dev/null << EOF
+[[customizations.filesystem]]
+mountpoint = "/foo/bar"
+size=2147483648
+[[customizations.filesystem]]
+mountpoint = "/foo"
+size=8589934592
+[[customizations.filesystem]]
+mountpoint = "/var/myfiles"
+size= "1 GiB"
+EOF
+fi
+
 greenprint "📄 vmdk blueprint"
 cat "$BLUEPRINT_FILE"
 
@@ -548,6 +565,7 @@ sudo ansible-playbook -v -i "${TEMPDIR}"/inventory \
     -e fdo_credential="false" \
     -e sysroot_ro="$SYSROOT_RO" \
     -e fips="${FIPS}" \
+    -e custom_fs_lvs="${CUSTOM_FS_LVS}" \
     /usr/share/tests/osbuild-composer/ansible/check_ostree.yaml || RESULTS=0
 check_result
 
@@ -682,6 +700,7 @@ sudo ansible-playbook -v -i "${TEMPDIR}"/inventory \
     -e fdo_credential="false" \
     -e sysroot_ro="$SYSROOT_RO" \
     -e fips="${FIPS}" \
+    -e custom_fs_lvs="${CUSTOM_FS_LVS}" \
     /usr/share/tests/osbuild-composer/ansible/check_ostree.yaml || RESULTS=0
 
 check_result
diff --git a/test/data/ansible/check_ostree.yaml b/test/data/ansible/check_ostree.yaml
index d82ed3a4e96..fab2fc26f61 100644
--- a/test/data/ansible/check_ostree.yaml
+++ b/test/data/ansible/check_ostree.yaml
@@ -14,6 +14,7 @@
     test_custom_dirs_files: "false"
     sysroot_ro: "false"
     fips: "false"
+    custom_fs_lvs: "false"
 
   tasks:
     # current target host's IP address
@@ -261,7 +262,7 @@
 
     # case: check pv size
     - name: check pv size
-      shell: pvs --reportformat json | jq .report[0].pv[0].pv_size -r
+      shell: pvs --reportformat json --units g | jq .report[0].pv[0].pv_size -r | sed "s/\.[0-9]\+g//g"
       become: yes
       register: result_pv_size
       when: "'/dev/mapper/rootvg-rootlv' in result_sysroot_source.stdout"
@@ -303,6 +304,38 @@
       when:
         - "'/dev/mapper/rootvg-rootlv' in result_sysroot_source.stdout"
         - fdo_credential == "false"
+        - custom_fs_lvs == "false"
+
+    # check logical volumes
+    - name: check logical volumes
+      shell: lvdisplay -a
+      become: yes
+      register: result_custom_lvs
+      when:
+        - "'/dev/mapper/rootvg-rootlv' in result_sysroot_source.stdout"
+        - custom_fs_lvs == "true"
+
+    - name: "check that custom partitions are present"
+      block:
+        - assert:
+            that:
+              - "'var_myfileslv' in result_custom_lvs.stdout"
+              - "'foolv' in result_custom_lvs.stdout"
+              - "'foo_barlv' in result_custom_lvs.stdout"
+            fail_msg: "There are custom partitions missing"
+            success_msg: "Custom partitions present in filesystem"
+      always:
+        - set_fact:
+            total_counter: "{{ total_counter | int + 1 }}"
+      rescue:
+        - name: failed count + 1
+          set_fact:
+            failed_counter: "{{ failed_counter | int + 1 }}"
+      when:
+        - "'/dev/mapper/rootvg-rootlv' in result_sysroot_source.stdout"
+        - fdo_credential == "false"
+        - custom_fs_lvs == "true"
+
 
     # case: check /sysroot lv size
     - name: check sysroot lv size