@aws-cdk/integ-tests-alpha fails when executing on Mac

[Casper3015]

Hi,
I have setup my CDK integ tests as below,

import {ExpectedResult, IntegTest} from "@aws-cdk/integ-tests-alpha";
import {App, Stack} from 'aws-cdk-lib';
import {RequireApproval} from "aws-cdk-lib/cloud-assembly-schema";
import {StackUnderTest} from "../src/infraStack";
import { aws_lambda as lambda } from "aws-cdk-lib";

/// !cdk-integ STACK BasicIntegTestFlow/DefaultTest/DeployAssert

const app = new App();

const integTest = new IntegTest(app, 'BasicIntegTestFlow', {
    testCases: [
        new StackUnderTest(app, 'Stack1', {
            architecture: lambda.Architecture.ARM_64,
        }),
        new StackUnderTest(app, 'Stack2', {
            architecture: lambda.Architecture.X86_64,
        }),
    ],
    diffAssets: true,
    stackUpdateWorkflow: true,
    cdkCommandOptions: {
        deploy: {
            args: {
                requireApproval: RequireApproval.NEVER,
                json: true,
            },
        },
        destroy: {
            args: {
                force: true,
            },
        },
    },
});

const invoke = integTest.assertions.invokeFunction({
    functionName: 'StackUnderTest-Function'
});
invoke.expect(ExpectedResult.objectLike({
    Payload: '200',
`}));`

When executing the tests using integ-runner running into the following exception,

Verifying integration test snapshots...

  NEW        integ.test 4.902s

Snapshot Results: 

Tests:    1 failed, 1 total

Running integration tests for failed tests...

Running in parallel across regions: us-east-1, us-east-2, us-west-2
Running test CDKIntegTestDemo/test/integ.test.ts in us-east-1
  ERROR      CDKIntegTestDemo/test/integ.test.ts (undefined/us-east-1) 4.505s
      Error during integration test: Error: integ.test is a new test. Please use the IntegTest construct to configure the test
https://github.com/aws/aws-cdk/tree/main/packages/%40aws-cdk/integ-tests

Test Results: 

Tests:    1 failed, 1 total
Error: Some integration tests failed!
    at main (CDKIntegTestDemo/node_modules/@aws-cdk/integ-runner/lib/index.js:10367:15)