diff --git a/.changeset/empty-jobs-listen.md b/.changeset/empty-jobs-listen.md
new file mode 100644
index 00000000..6b3b2207
--- /dev/null
+++ b/.changeset/empty-jobs-listen.md
@@ -0,0 +1,7 @@
+---
+"@delvtech/evm-client-ethers": patch
+"@delvtech/evm-client-viem": patch
+---
+
+Fixed the return type for Viem functions that return a single tuple/array.
+Fixed options for ethers functions
diff --git a/packages/evm-client-ethers/integration-tests/artifacts/CoreVoting.ts b/packages/evm-client-ethers/integration-tests/artifacts/CoreVoting.ts
new file mode 100644
index 00000000..dd13dddc
--- /dev/null
+++ b/packages/evm-client-ethers/integration-tests/artifacts/CoreVoting.ts
@@ -0,0 +1,614 @@
+export const CoreVoting = {
+  "_format": "hh-sol-artifact-1",
+  "contractName": "CoreVoting",
+  "sourceName": "contracts/CoreVoting.sol",
+  "abi": [
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "_timelock",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "_baseQuorum",
+          "type": "uint256"
+        },
+        {
+          "internalType": "uint256",
+          "name": "_minProposalPower",
+          "type": "uint256"
+        },
+        {
+          "internalType": "address",
+          "name": "_gsc",
+          "type": "address"
+        },
+        {
+          "internalType": "address[]",
+          "name": "votingVaults",
+          "type": "address[]"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "constructor"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "proposalId",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "created",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "execution",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "expiration",
+          "type": "uint256"
+        }
+      ],
+      "name": "ProposalCreated",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "proposalId",
+          "type": "uint256"
+        }
+      ],
+      "name": "ProposalExecuted",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "voter",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "uint256",
+          "name": "proposalId",
+          "type": "uint256"
+        },
+        {
+          "components": [
+            {
+              "internalType": "uint128",
+              "name": "votingPower",
+              "type": "uint128"
+            },
+            {
+              "internalType": "enum CoreVoting.Ballot",
+              "name": "castBallot",
+              "type": "uint8"
+            }
+          ],
+          "indexed": false,
+          "internalType": "struct CoreVoting.Vote",
+          "name": "vote",
+          "type": "tuple"
+        }
+      ],
+      "name": "Voted",
+      "type": "event"
+    },
+    {
+      "inputs": [],
+      "name": "DAY_IN_BLOCKS",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "name": "approvedVaults",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "who",
+          "type": "address"
+        }
+      ],
+      "name": "authorize",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "name": "authorized",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "baseQuorum",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "_extraVoteTime",
+          "type": "uint256"
+        }
+      ],
+      "name": "changeExtraVotingTime",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "vault",
+          "type": "address"
+        },
+        {
+          "internalType": "bool",
+          "name": "isValid",
+          "type": "bool"
+        }
+      ],
+      "name": "changeVaultStatus",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "who",
+          "type": "address"
+        }
+      ],
+      "name": "deauthorize",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "proposalId",
+          "type": "uint256"
+        },
+        {
+          "internalType": "address[]",
+          "name": "targets",
+          "type": "address[]"
+        },
+        {
+          "internalType": "bytes[]",
+          "name": "calldatas",
+          "type": "bytes[]"
+        }
+      ],
+      "name": "execute",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "extraVoteTime",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "proposalId",
+          "type": "uint256"
+        }
+      ],
+      "name": "getProposalVotingPower",
+      "outputs": [
+        {
+          "internalType": "uint128[3]",
+          "name": "",
+          "type": "uint128[3]"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "who",
+          "type": "address"
+        }
+      ],
+      "name": "isAuthorized",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "lockDuration",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "minProposalPower",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "owner",
+      "outputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address[]",
+          "name": "votingVaults",
+          "type": "address[]"
+        },
+        {
+          "internalType": "bytes[]",
+          "name": "extraVaultData",
+          "type": "bytes[]"
+        },
+        {
+          "internalType": "address[]",
+          "name": "targets",
+          "type": "address[]"
+        },
+        {
+          "internalType": "bytes[]",
+          "name": "calldatas",
+          "type": "bytes[]"
+        },
+        {
+          "internalType": "uint256",
+          "name": "lastCall",
+          "type": "uint256"
+        },
+        {
+          "internalType": "enum CoreVoting.Ballot",
+          "name": "ballot",
+          "type": "uint8"
+        }
+      ],
+      "name": "proposal",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "proposalCount",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "name": "proposals",
+      "outputs": [
+        {
+          "internalType": "bytes32",
+          "name": "proposalHash",
+          "type": "bytes32"
+        },
+        {
+          "internalType": "uint128",
+          "name": "created",
+          "type": "uint128"
+        },
+        {
+          "internalType": "uint128",
+          "name": "unlock",
+          "type": "uint128"
+        },
+        {
+          "internalType": "uint128",
+          "name": "expiration",
+          "type": "uint128"
+        },
+        {
+          "internalType": "uint128",
+          "name": "quorum",
+          "type": "uint128"
+        },
+        {
+          "internalType": "uint128",
+          "name": "lastCall",
+          "type": "uint128"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "target",
+          "type": "address"
+        },
+        {
+          "internalType": "bytes4",
+          "name": "functionSelector",
+          "type": "bytes4"
+        }
+      ],
+      "name": "quorums",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "target",
+          "type": "address"
+        },
+        {
+          "internalType": "bytes4",
+          "name": "selector",
+          "type": "bytes4"
+        },
+        {
+          "internalType": "uint256",
+          "name": "quorum",
+          "type": "uint256"
+        }
+      ],
+      "name": "setCustomQuorum",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "quorum",
+          "type": "uint256"
+        }
+      ],
+      "name": "setDefaultQuorum",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "_lockDuration",
+          "type": "uint256"
+        }
+      ],
+      "name": "setLockDuration",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "_minProposalPower",
+          "type": "uint256"
+        }
+      ],
+      "name": "setMinProposalPower",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "who",
+          "type": "address"
+        }
+      ],
+      "name": "setOwner",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address[]",
+          "name": "votingVaults",
+          "type": "address[]"
+        },
+        {
+          "internalType": "bytes[]",
+          "name": "extraVaultData",
+          "type": "bytes[]"
+        },
+        {
+          "internalType": "uint256",
+          "name": "proposalId",
+          "type": "uint256"
+        },
+        {
+          "internalType": "enum CoreVoting.Ballot",
+          "name": "ballot",
+          "type": "uint8"
+        }
+      ],
+      "name": "vote",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "name": "votes",
+      "outputs": [
+        {
+          "internalType": "uint128",
+          "name": "votingPower",
+          "type": "uint128"
+        },
+        {
+          "internalType": "enum CoreVoting.Ballot",
+          "name": "castBallot",
+          "type": "uint8"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    }
+  ],
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+  "deployedLinkReferences": {}
+} as const;
diff --git a/packages/evm-client-ethers/integration-tests/createReadContract.test.ts b/packages/evm-client-ethers/integration-tests/createReadContract.test.ts
new file mode 100644
index 00000000..f81c8797
--- /dev/null
+++ b/packages/evm-client-ethers/integration-tests/createReadContract.test.ts
@@ -0,0 +1,19 @@
+import { getDefaultProvider } from 'ethers';
+import { CoreVoting } from 'integration-tests/artifacts/CoreVoting';
+import { createCachedReadContract } from 'src/contract/createCachedReadContract';
+import { describe, it } from 'vitest';
+
+describe.todo('integration', () => {
+  it('It fetches events', async () => {
+    const provider = getDefaultProvider('http://localhost:8545');
+
+    const coreVotingContract = createCachedReadContract({
+      abi: CoreVoting.abi,
+      address: '0xe7f1725e7734ce288f8367e1bb143e90bb3f0512',
+      provider,
+    });
+
+    const result = await coreVotingContract.getEvents('ProposalCreated');
+    console.log('result:', result);
+  });
+});
diff --git a/packages/evm-client-ethers/package.json b/packages/evm-client-ethers/package.json
index cb6b2c8e..be914482 100644
--- a/packages/evm-client-ethers/package.json
+++ b/packages/evm-client-ethers/package.json
@@ -26,6 +26,9 @@
   "scripts": {
     "build": "tsup",
     "lint": "eslint .",
+    "test:watch": "vitest",
+    "test": "vitest run",
+    "test:integration": "vitest run integration",
     "typecheck": "tsc --noEmit",
     "watch": "tsup --watch"
   },
diff --git a/packages/evm-client-ethers/src/contract/createReadContract.ts b/packages/evm-client-ethers/src/contract/createReadContract.ts
index 359d1c4b..34d1c6f9 100644
--- a/packages/evm-client-ethers/src/contract/createReadContract.ts
+++ b/packages/evm-client-ethers/src/contract/createReadContract.ts
@@ -52,7 +52,7 @@ export function createReadContract<TAbi extends Abi = Abi>({
     },
 
     async read(functionName, args, options) {
-      const argsArray = friendlyToArray({
+      const argsArray: any[] = friendlyToArray({
         abi: abi as Abi,
         type: 'function',
         name: functionName,
@@ -60,9 +60,15 @@ export function createReadContract<TAbi extends Abi = Abi>({
         value: args,
       });
 
+      // Ethers recognizes the options as an object at the end of the arguments.
+      // If we pass in undefined, it will be interpreted as an argument to the
+      // function, so we only include it if it is defined.
+      if (options) {
+        argsArray.push(options);
+      }
+
       const output = await ethersContract[functionName]?.staticCallResult(
         ...argsArray,
-        options,
       );
 
       return arrayToFriendly({
@@ -75,7 +81,7 @@ export function createReadContract<TAbi extends Abi = Abi>({
     },
 
     async simulateWrite(functionName, args, options) {
-      const argsArray = friendlyToArray({
+      const argsArray: any[] = friendlyToArray({
         abi: abi as Abi,
         type: 'function',
         name: functionName,
@@ -83,9 +89,15 @@ export function createReadContract<TAbi extends Abi = Abi>({
         value: args,
       });
 
+      // Ethers recognizes the options as an object at the end of the arguments.
+      // If we pass in undefined, it will be interpreted as an argument to the
+      // function, so we only include it if it is defined.
+      if (options) {
+        argsArray.push(options);
+      }
+
       const output = await ethersContract[functionName]?.staticCallResult(
         ...argsArray,
-        options,
       );
 
       return arrayToFriendly({
diff --git a/packages/evm-client-ethers/tsconfig.json b/packages/evm-client-ethers/tsconfig.json
index b0dd9ad7..d785e1bb 100644
--- a/packages/evm-client-ethers/tsconfig.json
+++ b/packages/evm-client-ethers/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "$schema": "https://json.schemastore.org/tsconfig",
   "extends": "@repo/typescript-config/base.json",
-  "include": ["./*.ts", "src", "./.eslintrc.cjs"],
+  "include": ["./*.ts", "src", "integration-tests"],
   "exclude": ["node_modules"],
   "compilerOptions": {
     "rootDir": ".",
diff --git a/packages/evm-client-ethers/vite.config.ts b/packages/evm-client-ethers/vite.config.ts
new file mode 100644
index 00000000..cc40ce79
--- /dev/null
+++ b/packages/evm-client-ethers/vite.config.ts
@@ -0,0 +1,6 @@
+import tsconfigPaths from 'vite-tsconfig-paths';
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  plugins: [tsconfigPaths() as any],
+});
diff --git a/packages/evm-client-viem/integration-tests/artifacts/CoreVoting.ts b/packages/evm-client-viem/integration-tests/artifacts/CoreVoting.ts
new file mode 100644
index 00000000..dd13dddc
--- /dev/null
+++ b/packages/evm-client-viem/integration-tests/artifacts/CoreVoting.ts
@@ -0,0 +1,614 @@
+export const CoreVoting = {
+  "_format": "hh-sol-artifact-1",
+  "contractName": "CoreVoting",
+  "sourceName": "contracts/CoreVoting.sol",
+  "abi": [
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "_timelock",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "_baseQuorum",
+          "type": "uint256"
+        },
+        {
+          "internalType": "uint256",
+          "name": "_minProposalPower",
+          "type": "uint256"
+        },
+        {
+          "internalType": "address",
+          "name": "_gsc",
+          "type": "address"
+        },
+        {
+          "internalType": "address[]",
+          "name": "votingVaults",
+          "type": "address[]"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "constructor"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "proposalId",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "created",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "execution",
+          "type": "uint256"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "expiration",
+          "type": "uint256"
+        }
+      ],
+      "name": "ProposalCreated",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "proposalId",
+          "type": "uint256"
+        }
+      ],
+      "name": "ProposalExecuted",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "voter",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "uint256",
+          "name": "proposalId",
+          "type": "uint256"
+        },
+        {
+          "components": [
+            {
+              "internalType": "uint128",
+              "name": "votingPower",
+              "type": "uint128"
+            },
+            {
+              "internalType": "enum CoreVoting.Ballot",
+              "name": "castBallot",
+              "type": "uint8"
+            }
+          ],
+          "indexed": false,
+          "internalType": "struct CoreVoting.Vote",
+          "name": "vote",
+          "type": "tuple"
+        }
+      ],
+      "name": "Voted",
+      "type": "event"
+    },
+    {
+      "inputs": [],
+      "name": "DAY_IN_BLOCKS",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "name": "approvedVaults",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "who",
+          "type": "address"
+        }
+      ],
+      "name": "authorize",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "name": "authorized",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "baseQuorum",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "_extraVoteTime",
+          "type": "uint256"
+        }
+      ],
+      "name": "changeExtraVotingTime",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "vault",
+          "type": "address"
+        },
+        {
+          "internalType": "bool",
+          "name": "isValid",
+          "type": "bool"
+        }
+      ],
+      "name": "changeVaultStatus",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "who",
+          "type": "address"
+        }
+      ],
+      "name": "deauthorize",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "proposalId",
+          "type": "uint256"
+        },
+        {
+          "internalType": "address[]",
+          "name": "targets",
+          "type": "address[]"
+        },
+        {
+          "internalType": "bytes[]",
+          "name": "calldatas",
+          "type": "bytes[]"
+        }
+      ],
+      "name": "execute",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "extraVoteTime",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "proposalId",
+          "type": "uint256"
+        }
+      ],
+      "name": "getProposalVotingPower",
+      "outputs": [
+        {
+          "internalType": "uint128[3]",
+          "name": "",
+          "type": "uint128[3]"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "who",
+          "type": "address"
+        }
+      ],
+      "name": "isAuthorized",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "lockDuration",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "minProposalPower",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "owner",
+      "outputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address[]",
+          "name": "votingVaults",
+          "type": "address[]"
+        },
+        {
+          "internalType": "bytes[]",
+          "name": "extraVaultData",
+          "type": "bytes[]"
+        },
+        {
+          "internalType": "address[]",
+          "name": "targets",
+          "type": "address[]"
+        },
+        {
+          "internalType": "bytes[]",
+          "name": "calldatas",
+          "type": "bytes[]"
+        },
+        {
+          "internalType": "uint256",
+          "name": "lastCall",
+          "type": "uint256"
+        },
+        {
+          "internalType": "enum CoreVoting.Ballot",
+          "name": "ballot",
+          "type": "uint8"
+        }
+      ],
+      "name": "proposal",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "proposalCount",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "name": "proposals",
+      "outputs": [
+        {
+          "internalType": "bytes32",
+          "name": "proposalHash",
+          "type": "bytes32"
+        },
+        {
+          "internalType": "uint128",
+          "name": "created",
+          "type": "uint128"
+        },
+        {
+          "internalType": "uint128",
+          "name": "unlock",
+          "type": "uint128"
+        },
+        {
+          "internalType": "uint128",
+          "name": "expiration",
+          "type": "uint128"
+        },
+        {
+          "internalType": "uint128",
+          "name": "quorum",
+          "type": "uint128"
+        },
+        {
+          "internalType": "uint128",
+          "name": "lastCall",
+          "type": "uint128"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "target",
+          "type": "address"
+        },
+        {
+          "internalType": "bytes4",
+          "name": "functionSelector",
+          "type": "bytes4"
+        }
+      ],
+      "name": "quorums",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "target",
+          "type": "address"
+        },
+        {
+          "internalType": "bytes4",
+          "name": "selector",
+          "type": "bytes4"
+        },
+        {
+          "internalType": "uint256",
+          "name": "quorum",
+          "type": "uint256"
+        }
+      ],
+      "name": "setCustomQuorum",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "quorum",
+          "type": "uint256"
+        }
+      ],
+      "name": "setDefaultQuorum",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "_lockDuration",
+          "type": "uint256"
+        }
+      ],
+      "name": "setLockDuration",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "_minProposalPower",
+          "type": "uint256"
+        }
+      ],
+      "name": "setMinProposalPower",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "who",
+          "type": "address"
+        }
+      ],
+      "name": "setOwner",
+      "outputs": [],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address[]",
+          "name": "votingVaults",
+          "type": "address[]"
+        },
+        {
+          "internalType": "bytes[]",
+          "name": "extraVaultData",
+          "type": "bytes[]"
+        },
+        {
+          "internalType": "uint256",
+          "name": "proposalId",
+          "type": "uint256"
+        },
+        {
+          "internalType": "enum CoreVoting.Ballot",
+          "name": "ballot",
+          "type": "uint8"
+        }
+      ],
+      "name": "vote",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "name": "votes",
+      "outputs": [
+        {
+          "internalType": "uint128",
+          "name": "votingPower",
+          "type": "uint128"
+        },
+        {
+          "internalType": "enum CoreVoting.Ballot",
+          "name": "castBallot",
+          "type": "uint8"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    }
+  ],
+  "bytecode": 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+  "deployedLinkReferences": {}
+} as const;
diff --git a/packages/evm-client-viem/integration-tests/createReadContract.test.ts b/packages/evm-client-viem/integration-tests/createReadContract.test.ts
new file mode 100644
index 00000000..73089617
--- /dev/null
+++ b/packages/evm-client-viem/integration-tests/createReadContract.test.ts
@@ -0,0 +1,21 @@
+import { CoreVoting } from 'integration-tests/artifacts/CoreVoting';
+import { createCachedReadContract } from 'src/contract/createCachedReadContract';
+import { createPublicClient, http } from 'viem';
+import { describe, it } from 'vitest';
+
+describe.todo('integration', () => {
+  it('It fetches events', async () => {
+    const client = createPublicClient({
+      transport: http('http://localhost:8545'),
+    });
+
+    const coreVotingContract = createCachedReadContract({
+      abi: CoreVoting.abi,
+      address: '0xe7f1725e7734ce288f8367e1bb143e90bb3f0512',
+      publicClient: client,
+    });
+
+    const result = await coreVotingContract.getEvents('ProposalCreated');
+    console.log('result:', result);
+  });
+});
diff --git a/packages/evm-client-viem/package.json b/packages/evm-client-viem/package.json
index 6e3a83b2..032dee8c 100644
--- a/packages/evm-client-viem/package.json
+++ b/packages/evm-client-viem/package.json
@@ -26,6 +26,9 @@
   "scripts": {
     "build": "tsup",
     "lint": "eslint .",
+    "test:watch": "vitest",
+    "test": "vitest run",
+    "test:integration": "vitest run integration",
     "typecheck": "tsc --noEmit",
     "watch": "tsup --watch"
   },
@@ -44,9 +47,13 @@
   "devDependencies": {
     "@repo/eslint-config": "*",
     "@repo/typescript-config": "*",
+    "sinon": "^17.0.1",
+    "tsconfig-paths": "^4.2.0",
     "tsup": "^8.0.2",
     "typescript": "^5.3.3",
-    "viem": "^2.7.3"
+    "viem": "^2.7.3",
+    "vite-tsconfig-paths": "^4.3.1",
+    "vitest": "^1.2.2"
   },
   "publishConfig": {
     "access": "public"
diff --git a/packages/evm-client-viem/src/contract/createReadContract.ts b/packages/evm-client-viem/src/contract/createReadContract.ts
index cb52f429..982e6a58 100644
--- a/packages/evm-client-viem/src/contract/createReadContract.ts
+++ b/packages/evm-client-viem/src/contract/createReadContract.ts
@@ -2,6 +2,7 @@ import {
   DecodedFunctionData,
   Event,
   FunctionName,
+  FunctionReturn,
   ReadContract,
   ReadWriteContract,
   arrayToFriendly,
@@ -17,6 +18,7 @@ import {
   encodeFunctionData,
 } from 'viem';
 import { createReadWriteContract } from './createReadWriteContract';
+import { outputToFriendly } from './utils/outputToFriendly';
 
 export interface CreateReadContractOptions<TAbi extends Abi = Abi> {
   abi: TAbi;
@@ -72,15 +74,11 @@ export function createReadContract<TAbi extends Abi = Abi>({
         ...options,
       });
 
-      const arrayOutput = Array.isArray(output) ? output : [output];
-
-      return arrayToFriendly({
-        abi: abi as Abi,
-        type: 'function',
-        name: functionName,
-        kind: 'outputs',
-        values: arrayOutput,
-      });
+      return outputToFriendly({
+        abi,
+        functionName,
+        output,
+      }) as FunctionReturn<TAbi, typeof functionName>;
     },
 
     async simulateWrite(functionName, args, options) {
@@ -100,15 +98,11 @@ export function createReadContract<TAbi extends Abi = Abi>({
         ...createSimulateContractParameters(options),
       });
 
-      const arrayOutput = Array.isArray(result) ? result : [result];
-
-      return arrayToFriendly({
-        abi: abi as Abi,
-        type: 'function',
-        name: functionName,
-        kind: 'outputs',
-        values: arrayOutput,
-      });
+      return outputToFriendly({
+        abi,
+        functionName,
+        output: result,
+      }) as FunctionReturn<TAbi, typeof functionName>;
     },
 
     async getEvents(eventName, options) {
diff --git a/packages/evm-client-viem/src/contract/utils/outputToFriendly.ts b/packages/evm-client-viem/src/contract/utils/outputToFriendly.ts
new file mode 100644
index 00000000..34fa6de4
--- /dev/null
+++ b/packages/evm-client-viem/src/contract/utils/outputToFriendly.ts
@@ -0,0 +1,38 @@
+import {
+  FunctionReturn,
+  arrayToFriendly,
+  getAbiEntry,
+} from '@delvtech/evm-client';
+import { Abi } from 'viem';
+
+export function outputToFriendly<TAbi extends Abi>({
+  abi,
+  functionName,
+  output,
+}: {
+  abi: TAbi;
+  functionName: string;
+  output: unknown;
+}) {
+  // Viem automatically returns a single value if the function has only one
+  // output parameter so we don't need to convert it. It's important to
+  // check the ABI to determine the number of output parameters vs. checking
+  // if the output is an array because the outputs could be a single array
+  // (tuple) parameter.
+  const abiEntry = getAbiEntry({
+    abi,
+    type: 'function',
+    name: functionName,
+  });
+  if (abiEntry.outputs.length === 1) {
+    return output as FunctionReturn<TAbi, typeof functionName>;
+  }
+
+  return arrayToFriendly({
+    abi: abi as Abi,
+    type: 'function',
+    name: functionName,
+    kind: 'outputs',
+    values: output as unknown[],
+  }) as FunctionReturn<TAbi, typeof functionName>;
+}
diff --git a/packages/evm-client-viem/tsconfig.json b/packages/evm-client-viem/tsconfig.json
index b0dd9ad7..d785e1bb 100644
--- a/packages/evm-client-viem/tsconfig.json
+++ b/packages/evm-client-viem/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "$schema": "https://json.schemastore.org/tsconfig",
   "extends": "@repo/typescript-config/base.json",
-  "include": ["./*.ts", "src", "./.eslintrc.cjs"],
+  "include": ["./*.ts", "src", "integration-tests"],
   "exclude": ["node_modules"],
   "compilerOptions": {
     "rootDir": ".",
diff --git a/packages/evm-client-viem/vite.config.ts b/packages/evm-client-viem/vite.config.ts
new file mode 100644
index 00000000..cc40ce79
--- /dev/null
+++ b/packages/evm-client-viem/vite.config.ts
@@ -0,0 +1,6 @@
+import tsconfigPaths from 'vite-tsconfig-paths';
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  plugins: [tsconfigPaths() as any],
+});