diff --git a/fixtures/customize/dest.bu b/fixtures/customize/dest.bu
index 1e17035c9..139ee4c1b 100644
--- a/fixtures/customize/dest.bu
+++ b/fixtures/customize/dest.bu
@@ -9,10 +9,10 @@ systemd:
         Description=Dest Ignition Applied
         Before=multi-user.target
         ConditionPathExists=/etc/NetworkManager/system-connections/installer-test.nmconnection
-        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-json-eth1.nmconnection
-        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-json-eth2.nmconnection
-        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yaml-eth1.nmconnection
-        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yaml-eth2.nmconnection
+        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-js-eth1.nmconnection
+        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-js-eth2.nmconnection
+        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yl-eth1.nmconnection
+        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yl-eth2.nmconnection
         ConditionKernelCommandLine=install-config-karg-1
         ConditionKernelCommandLine=install-config-karg-2
         ConditionKernelCommandLine=dest-karg
@@ -23,7 +23,7 @@ systemd:
         [Service]
         Type=oneshot
         RemainAfterExit=true
-        ExecStart=/bin/grep -qz 'serial --unit=0 --speed=115200 --word=8 --parity=no.terminal_input serial.terminal_output serial.#' /boot/grub2/grub.cfg
+        ExecStart=/bin/grep -qz 'serial --unit=0 --speed=115200 --word=8 --parity=no.terminal_input serial.terminal_output serial.#' /boot/grub2/console.cfg
         ExecStart=/bin/echo @applied-dest-ign@
         StandardOutput=tty
 
diff --git a/fixtures/customize/dest.ign b/fixtures/customize/dest.ign
index fa60b6a83..2f8f45852 100644
--- a/fixtures/customize/dest.ign
+++ b/fixtures/customize/dest.ign
@@ -5,7 +5,7 @@
   "systemd": {
     "units": [
       {
-        "contents": "[Unit]\nDescription=Dest Ignition Applied\nBefore=multi-user.target\nConditionPathExists=/etc/NetworkManager/system-connections/installer-test.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-json-eth1.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-json-eth2.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yaml-eth1.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yaml-eth2.nmconnection\nConditionKernelCommandLine=install-config-karg-1\nConditionKernelCommandLine=install-config-karg-2\nConditionKernelCommandLine=dest-karg\nConditionKernelCommandLine=!ignition.platform.id=metal\nConditionKernelCommandLine=ignition.platform.id=qemu\nConditionKernelCommandLine=console=ttyS0,115200n8\n\n[Service]\nType=oneshot\nRemainAfterExit=true\nExecStart=/bin/grep -qz 'serial --unit=0 --speed=115200 --word=8 --parity=no.terminal_input serial.terminal_output serial.#' /boot/grub2/grub.cfg\nExecStart=/bin/echo @applied-dest-ign@\nStandardOutput=tty\n\n[Install]\nRequiredBy=multi-user.target\n",
+        "contents": "[Unit]\nDescription=Dest Ignition Applied\nBefore=multi-user.target\nConditionPathExists=/etc/NetworkManager/system-connections/installer-test.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-js-eth1.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-js-eth2.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yl-eth1.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yl-eth2.nmconnection\nConditionKernelCommandLine=install-config-karg-1\nConditionKernelCommandLine=install-config-karg-2\nConditionKernelCommandLine=dest-karg\nConditionKernelCommandLine=!ignition.platform.id=metal\nConditionKernelCommandLine=ignition.platform.id=qemu\nConditionKernelCommandLine=console=ttyS0,115200n8\n\n[Service]\nType=oneshot\nRemainAfterExit=true\nExecStart=/bin/grep -qz 'serial --unit=0 --speed=115200 --word=8 --parity=no.terminal_input serial.terminal_output serial.#' /boot/grub2/console.cfg\nExecStart=/bin/echo @applied-dest-ign@\nStandardOutput=tty\n\n[Install]\nRequiredBy=multi-user.target\n",
         "enabled": true,
         "name": "dest-ignition-applied.service"
       }
diff --git a/fixtures/customize/installer-test-nmstate-json.json b/fixtures/customize/installer-test-nmstate-json.json
index a0bd86bcc..94dbc13f6 100644
--- a/fixtures/customize/installer-test-nmstate-json.json
+++ b/fixtures/customize/installer-test-nmstate-json.json
@@ -1,7 +1,7 @@
 {
   "interfaces": [
     {
-      "name": "nmstate-json-eth1",
+      "name": "nmstate-js-eth1",
       "type": "ethernet",
       "state": "up",
       "ipv4": {
@@ -10,7 +10,7 @@
       }
     },
     {
-      "name": "nmstate-json-eth2",
+      "name": "nmstate-js-eth2",
       "type": "ethernet",
       "state": "up",
       "ipv4": {
diff --git a/fixtures/customize/installer-test-nmstate-yaml.yaml b/fixtures/customize/installer-test-nmstate-yaml.yaml
index d993d26d5..ffb29f3df 100644
--- a/fixtures/customize/installer-test-nmstate-yaml.yaml
+++ b/fixtures/customize/installer-test-nmstate-yaml.yaml
@@ -1,11 +1,11 @@
 interfaces:
-  - name: nmstate-yaml-eth1
+  - name: nmstate-yl-eth1
     type: ethernet
     state: up
     ipv4:
       enabled: true
       dhcp: true
-  - name: nmstate-yaml-eth2
+  - name: nmstate-yl-eth2
     type: ethernet
     state: up
     ipv4:
diff --git a/fixtures/customize/live.bu b/fixtures/customize/live.bu
index 1845f7406..253d4c216 100644
--- a/fixtures/customize/live.bu
+++ b/fixtures/customize/live.bu
@@ -10,10 +10,10 @@ systemd:
         Before=coreos-installer.target
         Before=multi-user.target
         ConditionPathExists=/etc/NetworkManager/system-connections/installer-test.nmconnection
-        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-json-eth1.nmconnection
-        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-json-eth2.nmconnection
-        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yaml-eth1.nmconnection
-        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yaml-eth2.nmconnection
+        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-js-eth1.nmconnection
+        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-js-eth2.nmconnection
+        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yl-eth1.nmconnection
+        ConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yl-eth2.nmconnection
 
         [Service]
         Type=oneshot
diff --git a/fixtures/customize/live.ign b/fixtures/customize/live.ign
index 57905ff74..d813129c1 100644
--- a/fixtures/customize/live.ign
+++ b/fixtures/customize/live.ign
@@ -5,7 +5,7 @@
   "systemd": {
     "units": [
       {
-        "contents": "[Unit]\nDescription=Live Ignition Applied\nBefore=coreos-installer.target\nBefore=multi-user.target\nConditionPathExists=/etc/NetworkManager/system-connections/installer-test.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-json-eth1.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-json-eth2.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yaml-eth1.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yaml-eth2.nmconnection\n\n[Service]\nType=oneshot\nRemainAfterExit=true\nExecStart=/bin/echo @applied-live-ign@\nStandardOutput=tty\n\n[Install]\nRequiredBy=coreos-installer.target\nRequiredBy=multi-user.target\n",
+        "contents": "[Unit]\nDescription=Live Ignition Applied\nBefore=coreos-installer.target\nBefore=multi-user.target\nConditionPathExists=/etc/NetworkManager/system-connections/installer-test.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-js-eth1.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-js-eth2.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yl-eth1.nmconnection\nConditionPathExists=/etc/NetworkManager/system-connections/nmstate-yl-eth2.nmconnection\n\n[Service]\nType=oneshot\nRemainAfterExit=true\nExecStart=/bin/echo @applied-live-ign@\nStandardOutput=tty\n\n[Install]\nRequiredBy=coreos-installer.target\nRequiredBy=multi-user.target\n",
         "enabled": true,
         "name": "live-ignition-applied.service"
       },
diff --git a/fixtures/customize/nmstate-json-eth1.nmconnection b/fixtures/customize/nmstate-js-eth1.nmconnection
similarity index 100%
rename from fixtures/customize/nmstate-json-eth1.nmconnection
rename to fixtures/customize/nmstate-js-eth1.nmconnection
diff --git a/fixtures/customize/nmstate-json-eth2.nmconnection b/fixtures/customize/nmstate-js-eth2.nmconnection
similarity index 69%
rename from fixtures/customize/nmstate-json-eth2.nmconnection
rename to fixtures/customize/nmstate-js-eth2.nmconnection
index f2fcda14b..822f79270 100644
--- a/fixtures/customize/nmstate-json-eth2.nmconnection
+++ b/fixtures/customize/nmstate-js-eth2.nmconnection
@@ -1,5 +1,5 @@
 [connection]
-id=nmstate-json-eth2
+id=nmstate-js-eth2
 type=ethernet
 
 [ipv4]
diff --git a/fixtures/customize/nmstate-yaml-eth1.nmconnection b/fixtures/customize/nmstate-yl-eth1.nmconnection
similarity index 69%
rename from fixtures/customize/nmstate-yaml-eth1.nmconnection
rename to fixtures/customize/nmstate-yl-eth1.nmconnection
index b08878065..7f6c4128b 100644
--- a/fixtures/customize/nmstate-yaml-eth1.nmconnection
+++ b/fixtures/customize/nmstate-yl-eth1.nmconnection
@@ -1,5 +1,5 @@
 [connection]
-id=nmstate-yaml-eth1
+id=nmstate-yl-eth1
 type=ethernet
 
 [ipv4]
diff --git a/fixtures/customize/nmstate-yaml-eth2.nmconnection b/fixtures/customize/nmstate-yl-eth2.nmconnection
similarity index 69%
rename from fixtures/customize/nmstate-yaml-eth2.nmconnection
rename to fixtures/customize/nmstate-yl-eth2.nmconnection
index b3d472b06..63387cf75 100644
--- a/fixtures/customize/nmstate-yaml-eth2.nmconnection
+++ b/fixtures/customize/nmstate-yl-eth2.nmconnection
@@ -1,5 +1,5 @@
 [connection]
-id=nmstate-yaml-eth2
+id=nmstate-yl-eth2
 type=ethernet
 
 [ipv4]
diff --git a/tests/images/customize.sh b/tests/images/customize.sh
index 61dc15be9..d03309184 100755
--- a/tests/images/customize.sh
+++ b/tests/images/customize.sh
@@ -145,28 +145,44 @@ qemu_disk() {
 }
 
 assert() {
-    grep -Fq "$1" log
+    if grep -Fq "$1" log; then
+        echo "Assertion passed: '$1' found in log"
+        return 0
+    else
+        echo "Assertion failed: '$1' not found in log"
+        return 1
+    fi
+}
+
+assert_not() {
+    if grep -Fq "$1" log; then
+        echo "Assertion failed: '$1' found in log"
+        return 1
+    else
+        echo "Assertion passed: '$1' not found in log"
+        return 0
+    fi
 }
 
 check_live_noinstall() {
     assert @applied-live-ign@
     assert @applied-live-2-ign@
-    ! assert @applied-dest-ign@
-    ! assert @applied-dest-2-ign@
+    assert_not @applied-dest-ign@
+    assert_not @applied-dest-2-ign@
     assert @did-not-install@
-    ! assert @preinst-1@
-    ! assert @preinst-2@
-    ! assert @postinst-1@
-    ! assert @postinst-2@
+    assert_not @preinst-1@
+    assert_not @preinst-2@
+    assert_not @postinst-1@
+    assert_not @postinst-2@
     assert 'Adding "coreos-installer test certificate" to list of CAs'
 }
 
 check_live_install() {
     assert @applied-live-ign@
     assert @applied-live-2-ign@
-    ! assert @applied-dest-ign@
-    ! assert @applied-dest-2-ign@
-    ! assert @did-not-install@
+    assert_not @applied-dest-ign@
+    assert_not @applied-dest-2-ign@
+    assert_not @did-not-install@
     assert @preinst-1@
     assert @preinst-2@
     assert @postinst-1@
@@ -175,14 +191,14 @@ check_live_install() {
 }
 
 check_dest() {
-    ! assert @applied-live-ign@
-    ! assert @applied-live-2-ign@
+    assert_not @applied-live-ign@
+    assert_not @applied-live-2-ign@
     assert @applied-dest-ign@
     assert @applied-dest-2-ign@
-    ! assert @preinst-1@
-    ! assert @preinst-2@
-    ! assert @postinst-1@
-    ! assert @postinst-2@
+    assert_not @preinst-1@
+    assert_not @preinst-2@
+    assert_not @postinst-1@
+    assert_not @postinst-2@
     assert 'Adding "coreos-installer test certificate" to list of CAs'
 }
 
@@ -278,19 +294,19 @@ coreos-installer pxe customize src-initrd -o initrd
     --network-keyfile "${fixtures}/installer-test.nmconnection" 2>&1 ||:) |
     grepq "already specifies keyfile"
 (iso_customize \
-    --network-keyfile "${fixtures}/nmstate-json-eth1.nmconnection" \
+    --network-keyfile "${fixtures}/nmstate-js-eth1.nmconnection" \
     --network-nmstate "${fixtures}/installer-test-nmstate-json.json" 2>&1 ||:) |
     grepq "already specifies keyfile"
 (iso_customize \
-    --network-keyfile "${fixtures}/nmstate-json-eth2.nmconnection" \
+    --network-keyfile "${fixtures}/nmstate-js-eth2.nmconnection" \
     --network-nmstate "${fixtures}/installer-test-nmstate-json.json" 2>&1 ||:) |
     grepq "already specifies keyfile"
 (iso_customize \
-    --network-keyfile "${fixtures}/nmstate-yaml-eth1.nmconnection" \
+    --network-keyfile "${fixtures}/nmstate-yl-eth1.nmconnection" \
     --network-nmstate "${fixtures}/installer-test-nmstate-yaml.yaml" 2>&1 ||:) |
     grepq "already specifies keyfile"
 (iso_customize \
-    --network-keyfile "${fixtures}/nmstate-yaml-eth2.nmconnection" \
+    --network-keyfile "${fixtures}/nmstate-yl-eth2.nmconnection" \
     --network-nmstate "${fixtures}/installer-test-nmstate-yaml.yaml" 2>&1 ||:) |
     grepq "already specifies keyfile"
 (iso_customize \