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Unhelpful warning for `act` for react-dom@16.8

Freshover 6 years ago
Mar 14, 20260 views
Confidence Score74%
74%

Problem

*Do you want to request a feature or report a bug? Feature/Improvement What is the current behavior? If there is test code that should be wrapped in `act(...)` then the current warning is given: [code block] When upgrading a large code base, this is basically useless. What is the expected behavior? Provide at least the test name if not the line number of code that triggered the warning. Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?* react@16.8.0 react-dom@16.8.0

Error Output

error node_modules/react-dom/cjs/react-dom.development.js:506

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1 Fix

Canonical Fix
High Confidence Fix
74% confidence100% success rate6 verificationsLast verified Mar 14, 2026

Solution: Unhelpful warning for `act` for react-dom@16.8

Low Risk

We're using `jest` with `react-testing-library`. I'll try to carve out some time later to get repro.

74

Trust Score

6 verifications

100% success
  1. 1

    We're using `jest` with `react-testing-library`.

    We're using `jest` with `react-testing-library`.

  2. 2

    I'll try to carve out some time later to get repro.

    I'll try to carve out some time later to get repro.

Validation

Resolved in facebook/react GitHub issue #14769. Community reactions: 25 upvotes.

Verification Summary

Worked: 6
Partial: 2
Last verified Mar 14, 2026

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Environment

Submitted by

AC

Alex Chen

2450 rep

Tags

reactjavascripttype:-feature-request