diff --git a/packages/core/test/mock-readable.ts b/packages/core/test/mock-readable.ts
index 30a5b19..b08e487 100644
--- a/packages/core/test/mock-readable.ts
+++ b/packages/core/test/mock-readable.ts
@@ -1,12 +1,7 @@
-import { ReadStream } from 'node:tty';
+import { Readable } from 'node:stream';
 
-export class MockReadable extends ReadStream {
+export class MockReadable extends Readable {
 	protected _buffer: unknown[] | null = [];
-	fd = 0 as const;
-
-	constructor() {
-		super(0);
-	}
 
 	_read() {
 		if (this._buffer === null) {
diff --git a/packages/core/test/mock-writable.ts b/packages/core/test/mock-writable.ts
index 02bfbd6..78a8902 100644
--- a/packages/core/test/mock-writable.ts
+++ b/packages/core/test/mock-writable.ts
@@ -1,12 +1,7 @@
-import { WriteStream } from 'node:tty';
+import { Writable } from 'node:stream';
 
-export class MockWritable extends WriteStream {
+export class MockWritable extends Writable {
 	public buffer: string[] = [];
-	fd = 1 as const;
-
-	constructor() {
-		super(1);
-	}
 
 	// biome-ignore lint/suspicious/noExplicitAny: any is the official type
 	_write(chunk: any, encoding: BufferEncoding, callback: (error?: Error | null | undefined) => void): void {
diff --git a/packages/core/test/prompts/prompt.test.ts b/packages/core/test/prompts/prompt.test.ts
index 386a598..e5a6e78 100644
--- a/packages/core/test/prompts/prompt.test.ts
+++ b/packages/core/test/prompts/prompt.test.ts
@@ -1,6 +1,6 @@
-import { describe, expect, test, afterEach, beforeEach, vi } from 'vitest';
-import { default as Prompt, isCancel } from '../../src/prompts/prompt.js';
 import { cursor } from 'sisteransi';
+import { afterEach, beforeEach, describe, expect, test, vi } from 'vitest';
+import { default as Prompt, isCancel } from '../../src/prompts/prompt.js';
 import { MockReadable } from '../mock-readable.js';
 import { MockWritable } from '../mock-writable.js';
 
diff --git a/packages/core/test/utils.test.ts b/packages/core/test/utils.test.ts
index 130d0ea..5d387fb 100644
--- a/packages/core/test/utils.test.ts
+++ b/packages/core/test/utils.test.ts
@@ -14,6 +14,7 @@ describe('utils', () => {
 		test('clears output on keypress', () => {
 			const input = new MockReadable();
 			const output = new MockWritable();
+			// @ts-ignore
 			const callback = block({ input, output });
 
 			const event: Key = {
@@ -28,6 +29,7 @@ describe('utils', () => {
 		test('clears output vertically when return pressed', () => {
 			const input = new MockReadable();
 			const output = new MockWritable();
+			// @ts-ignore
 			const callback = block({ input, output });
 
 			const event: Key = {
@@ -42,6 +44,7 @@ describe('utils', () => {
 		test('ignores additional keypresses after dispose', () => {
 			const input = new MockReadable();
 			const output = new MockWritable();
+			// @ts-ignore
 			const callback = block({ input, output });
 
 			const event: Key = {
@@ -58,9 +61,11 @@ describe('utils', () => {
 			const input = new MockReadable();
 			const output = new MockWritable();
 			// purposely don't keep the callback since we would exit the process
+			// @ts-ignore
 			block({ input, output });
+			// @ts-ignore
 			const spy = vi.spyOn(process, 'exit').mockImplementation(() => {
-				throw undefined;
+				return
 			});
 
 			const event: Key = {
@@ -75,6 +80,7 @@ describe('utils', () => {
 		test('does not clear if overwrite=false', () => {
 			const input = new MockReadable();
 			const output = new MockWritable();
+			// @ts-ignore
 			const callback = block({ input, output, overwrite: false });
 
 			const event: Key = {