diff --git a/devstack/customize_image.sh b/devstack/customize_image.sh
index 77ff699..0b9d8ab 100644
--- a/devstack/customize_image.sh
+++ b/devstack/customize_image.sh
@@ -149,6 +149,7 @@
 function customize_image {
     local image_file=$1
     local top_dir=$(dirname "${NEUTRON_TEMPEST_PLUGIN_DIR}")
+    install_customize_image_tools
     (
         export TEMP_DIR DISK_FORMAT RC_DIR
         if [[ "$(basename ${image_file})" == ubuntu-* ]]; then
diff --git a/devstack/plugin.sh b/devstack/plugin.sh
index 2e3ac20..42c31cd 100644
--- a/devstack/plugin.sh
+++ b/devstack/plugin.sh
@@ -6,7 +6,6 @@
 # install_neutron_tempest_plugin
 function install_neutron_tempest_plugin {
     setup_dev_lib "neutron-tempest-plugin"
-    install_customize_image_tools
 }
 
 if [[ "$1" == "stack" ]]; then
@@ -20,7 +19,7 @@
         test-config)
             echo_summary "Configuring neutron-tempest-plugin tempest options"
             configure_advanced_image
-            create_flavor_for_advance_image ntp_image_384M 384 4 1
+            create_flavor_for_advance_image $ADVANCED_INSTANCE_TYPE 256 4 1
             configure_flavor_for_advanced_image
     esac
 fi
diff --git a/neutron_tempest_plugin/scenario/test_dns_integration.py b/neutron_tempest_plugin/scenario/test_dns_integration.py
index 79c0993..240a5a8 100644
--- a/neutron_tempest_plugin/scenario/test_dns_integration.py
+++ b/neutron_tempest_plugin/scenario/test_dns_integration.py
@@ -47,8 +47,7 @@
     @classmethod
     def setup_clients(cls):
         super(BaseDNSIntegrationTests, cls).setup_clients()
-        cls.dns_client = cls.os_tempest.zones_client
-        cls.query_client = cls.os_tempest.query_client
+        cls.dns_client = cls.os_tempest.dns_v2.ZonesClient()
         cls.query_client.build_timeout = 30
 
     @classmethod
diff --git a/tools/customize_ubuntu_image b/tools/customize_ubuntu_image
index 3697265..fdd2d12 100755
--- a/tools/customize_ubuntu_image
+++ b/tools/customize_ubuntu_image
@@ -16,6 +16,13 @@
 INSTALL_GUEST_PACKAGES=(
    socat  # used to replace nc for testing advanced network features like
           # multicast
+   iperf3
+   iputils-ping
+   ncat
+   psmisc  # provides killall command
+   python3
+   tcpdump
+   vlan
 )
 
 # Function to be executed once after chroot on guest image
@@ -33,8 +40,8 @@
     # Install desired packages to Ubuntu guest image
     (
         DEBIAN_FRONTEND=noninteractive
-        apt-get update -y
-        apt-get install -y "${INSTALL_GUEST_PACKAGES[@]}"
+        sudo apt-get update -y
+        sudo apt-get install -y "${INSTALL_GUEST_PACKAGES[@]}"
     )
 }
 
diff --git a/zuul.d/base.yaml b/zuul.d/base.yaml
index 880e64f..12408ea 100644
--- a/zuul.d/base.yaml
+++ b/zuul.d/base.yaml
@@ -110,9 +110,10 @@
       devstack_localrc:
         PHYSICAL_NETWORK: default
         CIRROS_VERSION: 0.5.1
-        IMAGE_URLS: https://cloud-images.ubuntu.com/releases/bionic/release/ubuntu-18.04-server-cloudimg-amd64.img
-        ADVANCED_IMAGE_NAME: ubuntu-18.04-server-cloudimg-amd64
-        ADVANCED_INSTANCE_TYPE: ntp_image_384M
+        IMAGE_URLS: https://cloud-images.ubuntu.com/minimal/releases/focal/release/ubuntu-20.04-minimal-cloudimg-amd64.img
+        ADVANCED_IMAGE_NAME: ubuntu-20.04-minimal-cloudimg-amd64
+        ADVANCED_INSTANCE_TYPE: ntp_image_256M
         ADVANCED_INSTANCE_USER: ubuntu
+        CUSTOMIZE_IMAGE: true
         BUILD_TIMEOUT: 784
       tempest_concurrency: 3  # out of 4
diff --git a/zuul.d/master_jobs.yaml b/zuul.d/master_jobs.yaml
index f146def..68c7209 100644
--- a/zuul.d/master_jobs.yaml
+++ b/zuul.d/master_jobs.yaml
@@ -404,6 +404,14 @@
         Q_ML2_TENANT_NETWORK_TYPE: geneve
         Q_USE_PROVIDERNET_FOR_PUBLIC: true
         PHYSICAL_NETWORK: public
+        # NOTE(slaweq): In the job with OVN backend we can't use Ubuntu minimal
+        # image because kernel in that image don't supports MULTICAST traffic
+        # thus multicast scenario test with IGMP snooping enabled would fail
+        IMAGE_URLS: https://cloud-images.ubuntu.com/releases/bionic/release/ubuntu-18.04-server-cloudimg-amd64.img
+        ADVANCED_IMAGE_NAME: ubuntu-18.04-server-cloudimg-amd64
+        ADVANCED_INSTANCE_TYPE: ntp_image_384M
+        ADVANCED_INSTANCE_USER: ubuntu
+        CUSTOMIZE_IMAGE: false
         ENABLE_CHASSIS_AS_GW: true
         OVN_L3_CREATE_PUBLIC_NETWORK: true
         OVN_DBS_LOG_LEVEL: dbg
@@ -518,10 +526,11 @@
         NETWORK_API_EXTENSIONS: "{{ (network_api_extensions_common + network_api_extensions_dvr) | join(',') }}"
         PHYSICAL_NETWORK: default
         CIRROS_VERSION: 0.5.1
-        IMAGE_URLS: https://cloud-images.ubuntu.com/releases/bionic/release/ubuntu-18.04-server-cloudimg-amd64.img
-        ADVANCED_IMAGE_NAME: ubuntu-18.04-server-cloudimg-amd64
-        ADVANCED_INSTANCE_TYPE: ntp_image_384M
+        IMAGE_URLS: https://cloud-images.ubuntu.com/minimal/releases/focal/release/ubuntu-20.04-minimal-cloudimg-amd64.img
+        ADVANCED_IMAGE_NAME: ubuntu-20.04-minimal-cloudimg-amd64
+        ADVANCED_INSTANCE_TYPE: ntp_image_256M
         ADVANCED_INSTANCE_USER: ubuntu
+        CUSTOMIZE_IMAGE: true
         BUILD_TIMEOUT: 784
         Q_AGENT: openvswitch
         Q_ML2_TENANT_NETWORK_TYPE: vxlan
@@ -907,9 +916,9 @@
       devstack_localrc:
         NETWORK_API_EXTENSIONS: "{{ (network_api_extensions_common + network_api_extensions_tempest) | join(',') }}"
         DOWNLOAD_DEFAULT_IMAGES: false
-        IMAGE_URLS: "http://download.cirros-cloud.net/0.3.4/cirros-0.3.4-i386-disk.img,https://cloud-images.ubuntu.com/releases/bionic/release/ubuntu-18.04-server-cloudimg-amd64.img"
+        IMAGE_URLS: "http://download.cirros-cloud.net/0.3.4/cirros-0.3.4-i386-disk.img,https://cloud-images.ubuntu.com/minimal/releases/focal/release/ubuntu-20.04-minimal-cloudimg-amd64.img"
         DEFAULT_IMAGE_NAME: cirros-0.3.4-i386-disk
-        ADVANCED_IMAGE_NAME: ubuntu-18.04-server-cloudimg-amd64
+        ADVANCED_IMAGE_NAME: ubuntu-20.04-minimal-cloudimg-amd64
         BUILD_TIMEOUT: 784
         Q_AGENT: openvswitch
         Q_ML2_TENANT_NETWORK_TYPE: vxlan
@@ -922,7 +931,7 @@
         test-config:
           $TEMPEST_CONFIG:
             taas_plugin_options:
-              advanced_image_ref: ubuntu-18.04-server-cloudimg-amd64
+              advanced_image_ref: ubuntu-20.04-minimal-cloudimg-amd64
               advanced_image_ssh_user: ubuntu
               provider_physical_network: public
               provider_segmentation_id: 100
diff --git a/zuul.d/rocky_jobs.yaml b/zuul.d/rocky_jobs.yaml
index 5cb6125..83b2f26 100644
--- a/zuul.d/rocky_jobs.yaml
+++ b/zuul.d/rocky_jobs.yaml
@@ -441,7 +441,7 @@
         CIRROS_VERSION: 0.5.1
         IMAGE_URLS: https://cloud-images.ubuntu.com/releases/bionic/release/ubuntu-18.04-server-cloudimg-amd64.img
         ADVANCED_IMAGE_NAME: ubuntu-18.04-server-cloudimg-amd64
-        ADVANCED_INSTANCE_TYPE: ntp_image_384M
+        ADVANCED_INSTANCE_TYPE: ds512M
         ADVANCED_INSTANCE_USER: ubuntu
         BUILD_TIMEOUT: 784
         TEMPEST_PLUGINS: /opt/stack/neutron-tempest-plugin