diff --git a/runtime/flashbox/src/lib.rs b/runtime/flashbox/src/lib.rs
index 03387c0f5..8cd92b3ac 100644
--- a/runtime/flashbox/src/lib.rs
+++ b/runtime/flashbox/src/lib.rs
@@ -38,7 +38,7 @@ pub mod weights;
 mod tests;
 
 use {
-    cumulus_pallet_parachain_system::RelayNumberStrictlyIncreases,
+    cumulus_pallet_parachain_system::RelayNumberMonotonicallyIncreases,
     cumulus_primitives_core::{relay_chain::SessionIndex, BodyId, ParaId},
     frame_support::{
         construct_runtime,
@@ -504,7 +504,7 @@ impl cumulus_pallet_parachain_system::Config for Runtime {
     type ReservedDmpWeight = ();
     type XcmpMessageHandler = ();
     type ReservedXcmpWeight = ();
-    type CheckAssociatedRelayNumber = RelayNumberStrictlyIncreases;
+    type CheckAssociatedRelayNumber = RelayNumberMonotonicallyIncreases;
     type ConsensusHook = ConsensusHook;
 }
 
diff --git a/test/moonwall.config.json b/test/moonwall.config.json
index 0a045e2cc..950538844 100644
--- a/test/moonwall.config.json
+++ b/test/moonwall.config.json
@@ -577,6 +577,45 @@
                 }
             ]
         },
+        {
+            "name": "zombie_simple_template_upgrade_with_latest_releases",
+            "testFileDir": ["suites/rt-upgrade-templates-zombienet"],
+            "runScripts": [
+                "download-latest-rt-binaries.sh",
+                "build-spec-single-container.sh tmp container-chain-simple-node flashbox-local",
+                "download-polkadot.sh",
+                "download-latest-binaries.sh ../target/release",
+                "compile-wasm.ts compile -b tmp/tanssi-node -o wasm -c specs/single-container-tanssi-1000.json",
+                "compile-wasm.ts compile -b tmp/container-chain-simple-node -o wasm -c specs/single-container-template-container-2000.json"
+            ],
+
+            "timeout": 900000,
+            "foundation": {
+                "rtUpgradePath": "../target/release/wbuild/container-chain-template-simple-runtime/container_chain_template_simple_runtime.compact.compressed.wasm",
+                "type": "zombie",
+                "zombieSpec": {
+                    "configPath": "./configs/zombieTemplateUpgradeSimple.json",
+                    "disableDefaultEthProviders": true
+                }
+            },
+            "connections": [
+                {
+                    "name": "Relay",
+                    "type": "polkadotJs",
+                    "endpoints": ["ws://127.0.0.1:9947"]
+                },
+                {
+                    "name": "Tanssi",
+                    "type": "polkadotJs",
+                    "endpoints": ["ws://127.0.0.1:9948"]
+                },
+                {
+                    "name": "parachain",
+                    "type": "polkadotJs",
+                    "endpoints": ["ws://127.0.0.1:9949"]
+                }
+            ]
+        },
         {
             "name": "zombie_frontier_template_upgrade",
             "testFileDir": ["suites/rt-upgrade-templates-zombienet"],
@@ -615,6 +654,45 @@
                 }
             ]
         },
+        {
+            "name": "zombie_frontier_template_upgrade_with_latest_releases",
+            "testFileDir": ["suites/rt-upgrade-templates-zombienet"],
+            "runScripts": [
+                "download-latest-rt-binaries.sh",
+                "build-spec-single-container.sh tmp container-chain-frontier-node flashbox-local",
+                "download-polkadot.sh",
+                "download-latest-binaries.sh ../target/release",
+                "compile-wasm.ts compile -b tmp/tanssi-node -o wasm -c specs/single-container-tanssi-1000.json",
+                "compile-wasm.ts compile -b tmp/container-chain-frontier-node -o wasm -c specs/single-container-template-container-2000.json"
+            ],
+
+            "timeout": 900000,
+            "foundation": {
+                "rtUpgradePath": "../target/release/wbuild/container-chain-template-frontier-runtime/container_chain_template_frontier_runtime.compact.compressed.wasm",
+                "type": "zombie",
+                "zombieSpec": {
+                    "configPath": "./configs/zombieTemplateUpgradeFrontier.json",
+                    "disableDefaultEthProviders": true
+                }
+            },
+            "connections": [
+                {
+                    "name": "Relay",
+                    "type": "polkadotJs",
+                    "endpoints": ["ws://127.0.0.1:9947"]
+                },
+                {
+                    "name": "Tanssi",
+                    "type": "polkadotJs",
+                    "endpoints": ["ws://127.0.0.1:9948"]
+                },
+                {
+                    "name": "parachain",
+                    "type": "polkadotJs",
+                    "endpoints": ["ws://127.0.0.1:9949"]
+                }
+            ]
+        },
         {
             "name": "zombie_tanssi_relay",
             "timeout": 600000,
diff --git a/test/scripts/download-latest-binaries.sh b/test/scripts/download-latest-binaries.sh
new file mode 100755
index 000000000..af71871ee
--- /dev/null
+++ b/test/scripts/download-latest-binaries.sh
@@ -0,0 +1,55 @@
+#!/bin/bash
+
+# Exit on any error
+set -e
+
+# Always run the commands from the "test" dir
+cd $(dirname $0)/..
+
+if [[ -z "${1}" || ${1} == "undefined" ]]; then
+    OUTPUT_FOLDER="tmp"
+else
+    OUTPUT_FOLDER="${1}"
+fi
+
+LATEST_NODE_RELEASE=$(curl -s https://api.github.com/repos/moondance-labs/tanssi/releases | jq -r '.[] | select(.name | test("v0.";"i")) | .tag_name' | head -n 1 | tr -d '[:blank:]') && [[ ! -z "${LATEST_NODE_RELEASE}" ]]
+ENDPOINT="https://api.github.com/repos/moondance-labs/tanssi/git/refs/tags/$LATEST_NODE_RELEASE"
+RESPONSE=$(curl -s -H "Accept: application/vnd.github.v3+json" $ENDPOINT)
+TYPE=$(echo $RESPONSE | jq -r '.object.type')
+if [[ $TYPE == "commit" ]]
+then
+    LATEST_NODE_SHA8=$(echo $RESPONSE | jq -r '.object.sha' | cut -c -8)
+elif [[ $TYPE == "tag" ]]
+then
+    URL=$(echo $RESPONSE | jq -r '.object.url')
+    TAG_RESPONSE=$(curl -s -H "Accept: application/vnd.github.v3+json" $URL)
+    TAG_RESPONSE_CLEAN=$(echo $TAG_RESPONSE | tr -d '\000-\037')
+    LATEST_NODE_SHA8=$(echo $TAG_RESPONSE_CLEAN | jq -r '.object.sha' | cut -c -8)
+fi
+
+DOCKER_TAG_TANSSI="moondancelabs/tanssi:sha-$LATEST_NODE_SHA8"
+
+docker rm -f tanssi_container 2> /dev/null | true
+docker create --name tanssi_container $DOCKER_TAG_TANSSI bash
+docker cp tanssi_container:tanssi/tanssi-node $OUTPUT_FOLDER/tanssi-node
+docker rm -f tanssi_container
+chmod uog+x ../target/release/tanssi-node
+chmod uog+x $OUTPUT_FOLDER/tanssi-node
+
+DOCKER_TAG_CONTAINER_SIMPLE="moondancelabs/container-chain-simple-template:sha-$LATEST_NODE_SHA8"
+
+docker rm -f tanssi_container_simple 2> /dev/null | true
+docker create --name tanssi_container_simple $DOCKER_TAG_CONTAINER_SIMPLE bash
+docker cp tanssi_container_simple:container-chain-template-simple/container-chain-simple-node $OUTPUT_FOLDER/container-chain-simple-node
+docker rm -f tanssi_container_simple
+chmod uog+x ../target/release/container-chain-simple-node
+chmod uog+x $OUTPUT_FOLDER/container-chain-simple-node
+
+DOCKER_TAG_CONTAINER_FRONTIER="moondancelabs/container-chain-evm-template:sha-$LATEST_NODE_SHA8"
+
+docker rm -f tanssi_container_frontier 2> /dev/null | true
+docker create --name tanssi_container_frontier $DOCKER_TAG_CONTAINER_FRONTIER bash
+docker cp tanssi_container_frontier:container-chain-template-evm/container-chain-frontier-node $OUTPUT_FOLDER/container-chain-frontier-node
+docker rm -f tanssi_container_frontier
+chmod uog+x ../target/release/container-chain-frontier-node
+chmod uog+x $OUTPUT_FOLDER/container-chain-frontier-node