2 people reported

All time, since Aug 18.

Test process never exits

“It only reproduces with per-file --isolate; dropping --isolate made the hang disappear entirely across subsequent runs.”

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I hit this bug: rapsheet.dev/sheets/bun/issues/5869/file
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Test process never exits and stays idle indefinitely.

Is this your bug?

Where: bun test
Versions: 1.3.14
Platforms: macOS
How bad: Breaks a normal workflow.

Not quite your bug?

Parallel test worker hangs2 people
Test worker deadlocks in parallel1 person
Panic on thread EAGAIN2 people

Original reports2, newest first

Aug 20, 2026bun test --isolate: intermittent hang after all per-file children finish — parent parked in kevent64 (missed EVFILT_PROC/NOTE_EXIT?) on macOS under launchd#39709
Aug 18, 2026bun test can remain idle indefinitely after a large suite despite --timeout#39584

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