I've created a minimal example: https://github.com/JonasDoe/swc-node-issue When I run a test in this example, I get this log: ``` > swc-node@1.0.0 test:swc-node > node --import @swc-node/register/esm-register --test src/**/*.test.ts ▶ MyClass ✔ should not return an error after the assertion (0.5667ms) ✔ MyClass (1.3728ms) ✖ src\myClass.test.ts (507.915ms) ℹ tests 2 ℹ suites 1 ℹ pass 1 ℹ fail 1 ℹ cancelled 0 ℹ skipped 0 ℹ todo 0 ℹ duration_ms 514.5506 ✖ failing tests: test at src\myClass.test.ts:1:1 ✖ src\myClass.test.ts (507.915ms) 'test failed' ``` The tests does nothing more than creating an instance of `myClass` (without that, it would succeed): ``` import * as assert from 'assert'; import {describe, it} from 'node:test'; import {MyClass} from "./myClass.js"; describe('MyClass', () => { it('should not return an error after the assertion', () => { new MyClass() assert.ok(true) }) }) ``` `MyClass` looks like this: ``` export class MyClass { prop1?: string; prop2?: string; prop3?: string; prop4?: string; prop5?: string; constructor() {} get p1() {return this.prop1;} get p2() {return this.prop2;} method1() {} method2() {} method3() {} method4() {} } ``` So for some reason my tests is reported as failure besides everything was successful. The curious thing is: when I remove even a single property or method in `MyClass`, the test succeds, though. I'm using `@swc-node/register@1.10.10` and `Node.js@v22.15.0` under Windows 11 with `type: 'module'`.