1.1.43 broke my tests 😭

[subtleGradient]

What version of Bun is running?

1.1.43

What platform is your computer?

Darwin 24.1.0 arm64 arm

What steps can reproduce the bug?

(base) tom@tom-frens frontend % bun --version
1.1.43
(base) tom@tom-frens frontend % curl -fsSL https://bun.sh/install | bash -s "bun-v1.1.42"
######################################################################## 100.0%
bun was installed successfully to ~/.bun/bin/bun 
Run 'bun --help' to get started
(base) tom@tom-frens frontend % bun test
bun test v1.1.42 (50eec002)

 157 pass
 8 todo
 0 fail
 241 expect() calls
Ran 165 tests across 14 files. [871.00ms]

(base) tom@tom-frens frontend % curl -fsSL https://bun.sh/install | bash -s "bun-v1.1.43"
######################################################################## 100.0%
bun was installed successfully to ~/.bun/bin/bun 
Run 'bun --help' to get started
(base) tom@tom-frens frontend % bun test                                                 
bun test v1.1.43 (76800b04)

 147 pass
 8 todo
 10 fail
 212 expect() calls
Ran 165 tests across 14 files. [826.00ms]

What is the expected behavior?

tests that pass on 42 should still pass on 43

What do you see instead?

tests that pass on 42 fail on 43

Additional information

✓ frontend/src/micro-apps/usePromiseState.spec.tsx.md > PromiseStateWithResolvers > createPromiseStateWithResolvers > is a function [0.02ms]
145 | render(
146 | <React.Suspense fallback={<div>Loading...</div>}>
147 | <ViewSyncExternalStore2 store1={store} store2={store2} />
148 | </React.Suspense>,
149 | )
150 | expect(screen.getByText("Loading...")).toBeInTheDocument()
                                             ^
TypeError: expect(screen.getByText("Loading...")).toBeInTheDocument is not a function. (In 'expect(screen.getByText("Loading...")).toBeInTheDocument()', 'expect(screen.getByText("Loading...")).toBeInTheDocument' is undefined)
      at <anonymous> (/Users/tom/Developer/frens/rsc-subs/frontend/src/micro-apps/usePromiseState.spec.tsx.md.DEBUG.tsx:150:40)
      at <anonymous> (/Users/tom/Developer/frens/rsc-subs/frontend/src/micro-apps/usePromiseState.spec.tsx.md.DEBUG.tsx:143:42)
✗ frontend/src/micro-apps/usePromiseState.spec.tsx.md > LivePromiseState > multiple resolves > with multiple live states > when reset > does not suspend again [1.81ms]
119 | render(
120 | <React.Suspense fallback={<div>Loading...</div>}>
121 | <ViewSyncExternalStore2 store1={store} store2={store2} />
122 | </React.Suspense>,
123 | )
124 | expect(await screen.findByText("Loading...")).toBeInTheDocument()
                                                    ^

preload = ["./plugins/preload-before-anything.bun.ts"]

[test]
preload = [
    "./plugins/happydom.ts",
    "./plugins/testing-library.ts",
    "./plugins/preload-before-tests.tsx",
]

import { afterEach, expect } from "bun:test"
import { cleanup } from "@testing-library/react"
import * as matchers from "@testing-library/jest-dom/matchers"

expect.extend(matchers as any)

// Optional: cleans up `render` after each test
afterEach(() => {
  cleanup()
})

// console.debug("Testing Library registered")

[pfgithub]

A workaround until this is fixed is to call expect.extend({ ...matchers })

Reproduction:

bun init -y
bun add @testing-library/react
bun add @testing-library/jest-dom

import { test, afterEach, expect } from "bun:test"
import { cleanup } from "@testing-library/react"
import * as matchers from "@testing-library/jest-dom/matchers"

expect.extend(matchers as any)
afterEach(() => {
  cleanup()
})

test("expect extended", () => {
    expect(expect.toBeInTheDocument).not.toBe(undefined);
})

Regression was introduced in 2b2ca32