diff --git a/.github/workflows/rust-skipped.yml b/.github/workflows/rust-skipped.yml
index 38177d41fb..bd2669ac17 100644
--- a/.github/workflows/rust-skipped.yml
+++ b/.github/workflows/rust-skipped.yml
@@ -3,7 +3,7 @@ name: rust
 
 on:
   pull_request:
-    branches: [main]
+    branches: [main, v3]
     paths-ignore:
       - 'rust/**'
 
diff --git a/rust/config/testnet4_config.json b/rust/config/testnet4_config.json
index 003213a879..d9cdb4d9f4 100644
--- a/rust/config/testnet4_config.json
+++ b/rust/config/testnet4_config.json
@@ -190,14 +190,14 @@
       "aggregationHookFactory": "0xa1145B39F1c7Ef9aA593BC1DB1634b00CC020942",
       "routingIsmFactory": "0xea12ECFD1f241da323e93F12b4ed936403990190",
       "proxyAdmin": "0xb12282d2E838Aa5f2A4F9Ee5f624a77b7199A078",
-      "mailbox": "0x89280d0b68a246B276a910A518531E2a861CEb65",
-      "validatorAnnounce": "0x07b68177DE487200969261174b98FD067561Ab46",
       "defaultIsm": "0xEf7cacD303D1886b3dE396B45a184d16f39248E0",
-      "merkleTreeHook": "0xb6752a47541DAFaF17752FB2899BC1f138A03091",
       "storageGasOracle": "0x124EBCBC018A5D4Efe639f02ED86f95cdC3f6498",
       "interchainGasPaymaster": "0x0dD20e410bdB95404f71c5a4e7Fa67B892A5f949",
       "aggregationHook": "0x3d675bB93250Ab7603F40cbb9194bae210784627",
       "protocolFee": "0x3eF0a63B8976b838704Bcc93C78C56b6653E5a39",
+      "mailbox": "0xF9F6F5646F478d5ab4e20B0F910C92F1CCC9Cc6D",
+      "merkleTreeHook": "0xc6cbF39A747f5E28d1bDc8D9dfDAb2960Abd5A8f",
+      "validatorAnnounce": "0xf09701B0a93210113D175461b6135a96773B5465",
       "index": {
         "from": 33950052
       }
@@ -295,14 +295,14 @@
       "aggregationHookFactory": "0x6bc243963f80AEa80948e8538bB114d4122DD9c5",
       "routingIsmFactory": "0xd16c3f34d6A2e62185aC61f76F83D3AA1E969018",
       "proxyAdmin": "0x0EdB3604D230963ecE9d83963164CFe2fDef576B",
-      "mailbox": "0xc4796aAbcE2A9D774Ce4603f5Db5fB1605791dbd",
-      "validatorAnnounce": "0x0bbE9b20372B29e65B3feF370b22369561893231",
       "defaultIsm": "0x8BbdB0023ef47992b3E83E2B1B290D72A7477EfE",
-      "merkleTreeHook": "0xeE2842C22F15e69cD443378aa8fbD1fE16E59Ed3",
       "storageGasOracle": "0xeC34c715ee6d050b2172E8aF650Db779561266C1",
       "interchainGasPaymaster": "0x0cD26594ea6c6526927C0F5225AC09F6288e7140",
       "aggregationHook": "0x2dF77b3efe9B8f9aEDf7bFC86f40B048178d8116",
       "protocolFee": "0x9293B8dAcA7933765de499C992B0Fa86Bb104b0f",
+      "merkleTreeHook": "0x28c294C61D3dE053462d2Cfa5d5f8c8D70605A59",
+      "mailbox": "0x49cfd6Ef774AcAb14814D699e3F7eE36Fdfba932",
+      "validatorAnnounce": "0x3c182AD9cA8A71bc107Ef440C2667E8360e1158E",
       "index": {
         "from": 9816044
       }
@@ -599,14 +599,14 @@
       "aggregationHookFactory": "0x160C28C92cA453570aD7C031972b58d5Dd128F72",
       "routingIsmFactory": "0x3603458990BfEb30f99E61B58427d196814D8ce1",
       "proxyAdmin": "0x97Bbc6bBaFa5Ce3b2FA966c121Af63bD09e940f8",
-      "mailbox": "0x33AbaF6708be03Bdf0595DA0745A7111b01dB8c7",
-      "validatorAnnounce": "0x71B1BF7C99BEef0545eAFf441372cb6413d9367c",
       "defaultIsm": "0x97FE534674A0fA312b730C946A8A8AC9DcF90100",
-      "merkleTreeHook": "0xa5075B2AcA697944273d67B57a3340a0730632A3",
       "storageGasOracle": "0x71775B071F77F1ce52Ece810ce084451a3045FFe",
       "interchainGasPaymaster": "0x6f2756380FD49228ae25Aa7F2817993cB74Ecc56",
       "aggregationHook": "0xe3147d5618f5e2e100690B50ec923009a4cde14A",
       "protocolFee": "0x13AC3349Cb159fE86A22cf42DdA803D9f7309DB5",
+      "mailbox": "0xfFAEF09B3cd11D9b20d1a19bECca54EEC2884766",
+      "merkleTreeHook": "0x4917a9746A7B6E0A57159cCb7F5a6744247f2d0d",
+      "validatorAnnounce": "0xE6105C59480a1B7DD3E4f28153aFdbE12F4CfCD9",
       "index": {
         "from": 4432735
       }
diff --git a/typescript/helloworld/src/test/deploy.test.ts b/typescript/helloworld/src/test/deploy.test.ts
index 7a75c4ba54..95c416c726 100644
--- a/typescript/helloworld/src/test/deploy.test.ts
+++ b/typescript/helloworld/src/test/deploy.test.ts
@@ -4,6 +4,8 @@ import { ethers } from 'hardhat';
 import {
   ChainMap,
   HyperlaneContractsMap,
+  HyperlaneIsmFactory,
+  HyperlaneProxyFactoryDeployer,
   MultiProvider,
   TestCoreApp,
   TestCoreDeployer,
@@ -26,8 +28,12 @@ describe('deploy', async () => {
   before(async () => {
     const [signer] = await ethers.getSigners();
     multiProvider = MultiProvider.createTestMultiProvider({ signer });
-
-    const coreDeployer = new TestCoreDeployer(multiProvider);
+    const ismFactoryDeployer = new HyperlaneProxyFactoryDeployer(multiProvider);
+    const ismFactory = new HyperlaneIsmFactory(
+      await ismFactoryDeployer.deploy(multiProvider.mapKnownChains(() => ({}))),
+      multiProvider,
+    );
+    const coreDeployer = new TestCoreDeployer(multiProvider, ismFactory);
     core = await coreDeployer.deployApp();
     config = core.getRouterConfig(signer.address);
     deployer = new HelloWorldDeployer(multiProvider);
diff --git a/typescript/helloworld/src/test/helloworld.test.ts b/typescript/helloworld/src/test/helloworld.test.ts
index 07e8e6d804..5fdf43c6e6 100644
--- a/typescript/helloworld/src/test/helloworld.test.ts
+++ b/typescript/helloworld/src/test/helloworld.test.ts
@@ -5,6 +5,8 @@ import { ethers } from 'hardhat';
 import {
   ChainMap,
   Chains,
+  HyperlaneIsmFactory,
+  HyperlaneProxyFactoryDeployer,
   MultiProvider,
   TestCoreApp,
   TestCoreDeployer,
@@ -30,7 +32,12 @@ describe('HelloWorld', async () => {
   before(async () => {
     [signer] = await ethers.getSigners();
     multiProvider = MultiProvider.createTestMultiProvider({ signer });
-    coreApp = await new TestCoreDeployer(multiProvider).deployApp();
+    const ismFactoryDeployer = new HyperlaneProxyFactoryDeployer(multiProvider);
+    const ismFactory = new HyperlaneIsmFactory(
+      await ismFactoryDeployer.deploy(multiProvider.mapKnownChains(() => ({}))),
+      multiProvider,
+    );
+    coreApp = await new TestCoreDeployer(multiProvider, ismFactory).deployApp();
     config = coreApp.getRouterConfig(signer.address);
 
     localDomain = multiProvider.getDomainId(localChain);
diff --git a/typescript/infra/config/environments/testnet4/agent.ts b/typescript/infra/config/environments/testnet4/agent.ts
index bea891f922..5b89cff47d 100644
--- a/typescript/infra/config/environments/testnet4/agent.ts
+++ b/typescript/infra/config/environments/testnet4/agent.ts
@@ -49,7 +49,7 @@ const hyperlane: RootAgentConfig = {
     rpcConsensusType: RpcConsensusType.Fallback,
     docker: {
       repo,
-      tag: 'cfaf553-20231009-174623',
+      tag: '65ac90a-20231020-192310',
     },
     blacklist: [
       ...releaseCandidateHelloworldMatchingList,
@@ -66,7 +66,7 @@ const hyperlane: RootAgentConfig = {
     rpcConsensusType: RpcConsensusType.Fallback,
     docker: {
       repo,
-      tag: 'cfaf553-20231009-174623',
+      tag: '65ac90a-20231020-192310',
     },
     chains: validatorChainConfig(Contexts.Hyperlane),
   },
@@ -74,7 +74,7 @@ const hyperlane: RootAgentConfig = {
     rpcConsensusType: RpcConsensusType.Fallback,
     docker: {
       repo,
-      tag: 'cfaf553-20231009-174623',
+      tag: '65ac90a-20231020-192310',
     },
   },
 };
diff --git a/typescript/sdk/src/core/TestCoreDeployer.ts b/typescript/sdk/src/core/TestCoreDeployer.ts
index 33b91c09c2..abb61a7abc 100644
--- a/typescript/sdk/src/core/TestCoreDeployer.ts
+++ b/typescript/sdk/src/core/TestCoreDeployer.ts
@@ -1,45 +1,13 @@
-import {
-  TestInterchainGasPaymaster__factory,
-  TestMailbox__factory,
-  TestMultisigIsm__factory,
-} from '@hyperlane-xyz/core';
-
 import { TestChains } from '../consts/chains';
 import { HyperlaneContracts } from '../contracts/types';
-import { HyperlaneIsmFactory } from '../ism/HyperlaneIsmFactory';
-import { MultiProvider } from '../providers/MultiProvider';
 import { testCoreConfig } from '../test/testUtils';
-import { ChainMap, ChainName } from '../types';
+import { ChainMap } from '../types';
 
 import { HyperlaneCoreDeployer } from './HyperlaneCoreDeployer';
 import { TestCoreApp } from './TestCoreApp';
-import { CoreFactories, coreFactories } from './contracts';
-
-const testCoreFactories = {
-  ...coreFactories,
-  mailbox: new TestMailbox__factory(),
-  interchainGasPaymaster: new TestInterchainGasPaymaster__factory(),
-  testIsm: new TestMultisigIsm__factory(),
-};
+import { CoreFactories } from './contracts';
 
 export class TestCoreDeployer extends HyperlaneCoreDeployer {
-  constructor(public readonly multiProvider: MultiProvider) {
-    const ismFactory = new HyperlaneIsmFactory({}, multiProvider);
-    super(multiProvider, ismFactory);
-  }
-
-  // deploy a test ISM instead of a real ISM
-  async deployIsm(chain: ChainName): Promise<string> {
-    const testIsm = await this.deployContractFromFactory(
-      chain,
-      testCoreFactories.testIsm,
-      'testIsm',
-      [],
-    );
-    await testIsm.setAccept(true);
-    return testIsm.address;
-  }
-
   async deploy(): Promise<ChainMap<HyperlaneContracts<CoreFactories>>> {
     return super.deploy(testCoreConfig(TestChains));
   }
diff --git a/typescript/sdk/src/core/testHyperlaneDeploy.hardhat-test.ts b/typescript/sdk/src/core/testHyperlaneDeploy.hardhat-test.ts
index a6f900f30f..358764d6c2 100644
--- a/typescript/sdk/src/core/testHyperlaneDeploy.hardhat-test.ts
+++ b/typescript/sdk/src/core/testHyperlaneDeploy.hardhat-test.ts
@@ -8,6 +8,8 @@ import { TestMailbox, TestRecipient__factory } from '@hyperlane-xyz/core';
 import { addressToBytes32 } from '@hyperlane-xyz/utils';
 
 import { Chains } from '../consts/chains';
+import { HyperlaneProxyFactoryDeployer } from '../deploy/HyperlaneProxyFactoryDeployer';
+import { HyperlaneIsmFactory } from '../ism/HyperlaneIsmFactory';
 import { MultiProvider } from '../providers/MultiProvider';
 
 import { TestCoreApp } from './TestCoreApp';
@@ -27,7 +29,13 @@ describe('TestCoreDeployer', async () => {
     const [signer] = await ethers.getSigners();
 
     const multiProvider = MultiProvider.createTestMultiProvider({ signer });
-    const deployer = new TestCoreDeployer(multiProvider);
+
+    const ismFactoryDeployer = new HyperlaneProxyFactoryDeployer(multiProvider);
+    const ismFactory = new HyperlaneIsmFactory(
+      await ismFactoryDeployer.deploy(multiProvider.mapKnownChains(() => ({}))),
+      multiProvider,
+    );
+    const deployer = new TestCoreDeployer(multiProvider, ismFactory);
     testCoreApp = await deployer.deployApp();
 
     const recipient = await new TestRecipient__factory(signer).deploy();
diff --git a/typescript/sdk/src/ism/HyperlaneIsmFactory.ts b/typescript/sdk/src/ism/HyperlaneIsmFactory.ts
index 8523451599..f4117735fa 100644
--- a/typescript/sdk/src/ism/HyperlaneIsmFactory.ts
+++ b/typescript/sdk/src/ism/HyperlaneIsmFactory.ts
@@ -10,6 +10,7 @@ import {
   StaticAddressSetFactory,
   StaticAggregationIsm__factory,
   StaticThresholdAddressSetFactory,
+  TestMultisigIsm__factory,
 } from '@hyperlane-xyz/core';
 import { Address, eqAddress, formatMessage, warn } from '@hyperlane-xyz/utils';
 
@@ -107,6 +108,8 @@ export class HyperlaneIsmFactory extends HyperlaneApp<FactoryFactories> {
     } else if (config.type === ModuleType.AGGREGATION) {
       this.logger(`Deploying Aggregation ISM to ${chain}`);
       contract = await this.deployAggregationIsm(chain, config, origin);
+    } else if (config.type === ModuleType.TEST_ISM) {
+      contract = await this.deployTestIsm(chain);
     } else {
       throw new Error(`Unsupported ISM type`);
     }
@@ -214,6 +217,13 @@ export class HyperlaneIsmFactory extends HyperlaneApp<FactoryFactories> {
     return IAggregationIsm__factory.connect(address, signer);
   }
 
+  private async deployTestIsm(chain: ChainName) {
+    const signer = this.multiProvider.getSigner(chain);
+    const factory = new TestMultisigIsm__factory(signer);
+    const contract = await factory.deploy();
+    return contract;
+  }
+
   async deployStaticAddressSet(
     chain: ChainName,
     factory: StaticThresholdAddressSetFactory | StaticAddressSetFactory,
@@ -355,6 +365,9 @@ export async function moduleCanCertainlyVerify(
         }
         return verified >= destModule.threshold;
       }
+      case ModuleType.TEST_ISM: {
+        return true;
+      }
     }
   }
 }
@@ -513,6 +526,9 @@ export function collectValidators(
     aggregatedValidators.forEach((set) => {
       validators = validators.concat([...set]);
     });
+  } else if (config.type === ModuleType.TEST_ISM) {
+    // This is just a TestISM
+    return new Set([]);
   } else {
     throw new Error('Unsupported ModuleType');
   }
diff --git a/typescript/sdk/src/ism/types.ts b/typescript/sdk/src/ism/types.ts
index 23c6bdaca8..9e9c64758e 100644
--- a/typescript/sdk/src/ism/types.ts
+++ b/typescript/sdk/src/ism/types.ts
@@ -5,6 +5,7 @@ import {
   IRoutingIsm,
   StaticMerkleRootMultisigIsm,
   StaticMessageIdMultisigIsm,
+  TestMultisigIsm,
 } from '@hyperlane-xyz/core';
 import type { Address } from '@hyperlane-xyz/utils';
 
@@ -16,7 +17,8 @@ export type DeployedIsm =
   | IAggregationIsm
   | IRoutingIsm
   | StaticMessageIdMultisigIsm
-  | StaticMerkleRootMultisigIsm;
+  | StaticMerkleRootMultisigIsm
+  | TestMultisigIsm;
 
 export enum ModuleType {
   UNUSED,
@@ -25,6 +27,7 @@ export enum ModuleType {
   LEGACY_MULTISIG, // DEPRECATED
   MERKLE_ROOT_MULTISIG,
   MESSAGE_ID_MULTISIG,
+  TEST_ISM,
 }
 
 export type MultisigConfig = {
@@ -36,6 +39,10 @@ export type MultisigIsmConfig = MultisigConfig & {
   type: ModuleType.MERKLE_ROOT_MULTISIG | ModuleType.MESSAGE_ID_MULTISIG;
 };
 
+export type TestMultisigIsmConfig = MultisigConfig & {
+  type: ModuleType.TEST_ISM;
+};
+
 export type RoutingIsmConfig = {
   type: ModuleType.ROUTING;
   owner: Address;
@@ -52,4 +59,5 @@ export type IsmConfig =
   | Address
   | RoutingIsmConfig
   | MultisigIsmConfig
-  | AggregationIsmConfig;
+  | AggregationIsmConfig
+  | TestMultisigIsmConfig;
diff --git a/typescript/sdk/src/middleware/account/accounts.hardhat-test.ts b/typescript/sdk/src/middleware/account/accounts.hardhat-test.ts
index 1984dc7bd8..f837eb3554 100644
--- a/typescript/sdk/src/middleware/account/accounts.hardhat-test.ts
+++ b/typescript/sdk/src/middleware/account/accounts.hardhat-test.ts
@@ -11,6 +11,8 @@ import { Chains } from '../../consts/chains';
 import { HyperlaneContractsMap } from '../../contracts/types';
 import { TestCoreApp } from '../../core/TestCoreApp';
 import { TestCoreDeployer } from '../../core/TestCoreDeployer';
+import { HyperlaneProxyFactoryDeployer } from '../../deploy/HyperlaneProxyFactoryDeployer';
+import { HyperlaneIsmFactory } from '../../ism/HyperlaneIsmFactory';
 import { MultiProvider } from '../../providers/MultiProvider';
 import { RouterConfig } from '../../router/types';
 import { ChainMap } from '../../types';
@@ -35,7 +37,12 @@ describe.skip('InterchainAccounts', async () => {
   before(async () => {
     [signer] = await ethers.getSigners();
     multiProvider = MultiProvider.createTestMultiProvider({ signer });
-    coreApp = await new TestCoreDeployer(multiProvider).deployApp();
+    const ismFactoryDeployer = new HyperlaneProxyFactoryDeployer(multiProvider);
+    const ismFactory = new HyperlaneIsmFactory(
+      await ismFactoryDeployer.deploy(multiProvider.mapKnownChains(() => ({}))),
+      multiProvider,
+    );
+    coreApp = await new TestCoreDeployer(multiProvider, ismFactory).deployApp();
     config = coreApp.getRouterConfig(signer.address);
   });
 
diff --git a/typescript/sdk/src/middleware/liquidity-layer/liquidity-layer.hardhat-test.ts b/typescript/sdk/src/middleware/liquidity-layer/liquidity-layer.hardhat-test.ts
index 14530723e3..e60c1d48f1 100644
--- a/typescript/sdk/src/middleware/liquidity-layer/liquidity-layer.hardhat-test.ts
+++ b/typescript/sdk/src/middleware/liquidity-layer/liquidity-layer.hardhat-test.ts
@@ -20,6 +20,8 @@ import { chainMetadata } from '../../consts/chainMetadata';
 import { Chains } from '../../consts/chains';
 import { TestCoreApp } from '../../core/TestCoreApp';
 import { TestCoreDeployer } from '../../core/TestCoreDeployer';
+import { HyperlaneProxyFactoryDeployer } from '../../deploy/HyperlaneProxyFactoryDeployer';
+import { HyperlaneIsmFactory } from '../../ism/HyperlaneIsmFactory';
 import { MultiProvider } from '../../providers/MultiProvider';
 import { ChainMap } from '../../types';
 
@@ -53,7 +55,12 @@ describe.skip('LiquidityLayerRouter', async () => {
   before(async () => {
     [signer] = await ethers.getSigners();
     multiProvider = MultiProvider.createTestMultiProvider({ signer });
-    coreApp = await new TestCoreDeployer(multiProvider).deployApp();
+    const ismFactoryDeployer = new HyperlaneProxyFactoryDeployer(multiProvider);
+    const ismFactory = new HyperlaneIsmFactory(
+      await ismFactoryDeployer.deploy(multiProvider.mapKnownChains(() => ({}))),
+      multiProvider,
+    );
+    coreApp = await new TestCoreDeployer(multiProvider, ismFactory).deployApp();
     const routerConfig = coreApp.getRouterConfig(signer.address);
 
     const mockTokenF = new MockToken__factory(signer);
diff --git a/typescript/sdk/src/middleware/query/queries.hardhat-test.ts b/typescript/sdk/src/middleware/query/queries.hardhat-test.ts
index 6a64b004f8..c2b1d99f50 100644
--- a/typescript/sdk/src/middleware/query/queries.hardhat-test.ts
+++ b/typescript/sdk/src/middleware/query/queries.hardhat-test.ts
@@ -14,6 +14,8 @@ import { Chains } from '../../consts/chains';
 import { HyperlaneContractsMap } from '../../contracts/types';
 import { TestCoreApp } from '../../core/TestCoreApp';
 import { TestCoreDeployer } from '../../core/TestCoreDeployer';
+import { HyperlaneProxyFactoryDeployer } from '../../deploy/HyperlaneProxyFactoryDeployer';
+import { HyperlaneIsmFactory } from '../../ism/HyperlaneIsmFactory';
 import { MultiProvider } from '../../providers/MultiProvider';
 import { RouterConfig } from '../../router/types';
 import { ChainMap } from '../../types';
@@ -41,7 +43,12 @@ describe.skip('InterchainQueryRouter', async () => {
   before(async () => {
     [signer] = await ethers.getSigners();
     multiProvider = MultiProvider.createTestMultiProvider({ signer });
-    coreApp = await new TestCoreDeployer(multiProvider).deployApp();
+    const ismFactoryDeployer = new HyperlaneProxyFactoryDeployer(multiProvider);
+    const ismFactory = new HyperlaneIsmFactory(
+      await ismFactoryDeployer.deploy(multiProvider.mapKnownChains(() => ({}))),
+      multiProvider,
+    );
+    coreApp = await new TestCoreDeployer(multiProvider, ismFactory).deployApp();
     config = coreApp.getRouterConfig(signer.address);
   });
 
diff --git a/typescript/sdk/src/test/testUtils.ts b/typescript/sdk/src/test/testUtils.ts
index 1f78cc7d37..f75b64d89d 100644
--- a/typescript/sdk/src/test/testUtils.ts
+++ b/typescript/sdk/src/test/testUtils.ts
@@ -14,7 +14,7 @@ import {
   CoinGeckoSimplePriceParams,
 } from '../gas/token-prices';
 import { HookType } from '../hook/types';
-import { ModuleType, MultisigIsmConfig } from '../ism/types';
+import { ModuleType, TestMultisigIsmConfig } from '../ism/types';
 import { RouterConfig } from '../router/types';
 import { ChainMap, ChainName } from '../types';
 
@@ -45,8 +45,8 @@ const nonZeroAddress = ethers.constants.AddressZero.replace('00', '01');
 
 // dummy config as TestInbox and TestOutbox do not use deployed ISM
 export function testCoreConfig(chains: ChainName[]): ChainMap<CoreConfig> {
-  const multisigIsm: MultisigIsmConfig = {
-    type: ModuleType.MERKLE_ROOT_MULTISIG,
+  const multisigIsm: TestMultisigIsmConfig = {
+    type: ModuleType.TEST_ISM,
     validators: [nonZeroAddress],
     threshold: 1,
   };