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Repair wp/5.5 branch Actions: Pin wp-phpunit/wp-phpunit to the WordPress 5.5 test bootstrap - #85015

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@desrosj

@desrosj desrosj commented Oct 16, 2026 •

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Part of #82938.

What?

Changes the wp-phpunit/wp-phpunit constraint in composer.json from ^5.4 to ~5.5.0, and adds yoast/phpunit-polyfills ^1.0, which that test library requires. composer.lock moves wp-phpunit/wp-phpunit from 5.5.1 to 5.5.21, the newest 5.5.x release on Packagist, and adds yoast/phpunit-polyfills 1.1.5.

Why?

^5.4 resolved to wp-phpunit/wp-phpunit 5.5.1, from September 2020. Pinning ~5.5.0 keeps the test library on WordPress 5.5's while picking up that release line's later updates, matching the other branches (~5.9.0 on wp/5.9, ~5.8.0, ~5.7.0, ~5.6.0).

wp-phpunit/wp-phpunit 5.5.7 and newer require yoast/phpunit-polyfills. Without it, every leg stops before any test runs:

Error: The PHPUnit Polyfills library is a requirement for running the WP test suite.

How?

This is the wp/5.5 version of #84974 (wp/5.6), #84942 (wp/5.8) and #84944 (wp/5.7). Regenerated with composer update wp-phpunit/wp-phpunit yoast/phpunit-polyfills --with-dependencies (Composer 2.10.3) running on PHP 7.4, so every locked package installs on the PHP 7.4 runner the PHP coding standards job uses; composer validate passes. Resolved on a newer PHP, the lock picks doctrine/instantiator 2.1.0 and myclabs/deep-copy 1.14.0, which need PHP 8 and fail that job's install.

yoast/phpunit-polyfills requires phpunit/phpunit, and this branch has no phpunit/phpunit dependency or platform PHP version yet, so Composer pulls in PHPUnit 9.6.38 and its dependencies here. The test library refuses PHPUnit 8 and newer, and PHP 5.6 and 7.0 can't load PHPUnit 9's classes, so the PHP legs fail at this PR. #85016, directly above, pins it to PHPUnit 5.7, which PHP 5.6 can load, and sets the platform PHP version.

Use of AI Tools

This PR was created by Claude Code under my supervision. All code should be treated as AI-produced and not yet reviewed by a human until this PR is marked Ready for Review.

@desrosj desrosj added the [Type] Build Tooling Issues or PRs related to build tooling label Oct 16, 2026
@desrosj desrosj self-assigned this Oct 16, 2026
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@desrosj
desrosj added this pull request to stack #85017 October 16, 2026 20:10
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Size Change: 0 B

Total Size: 1.14 MB

ℹ️ View Unchanged
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The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

If you're merging code through a pull request on GitHub, copy and paste the following into the bottom of the merge commit message.

Co-authored-by: desrosj <desrosj@git.wordpress.org>
Co-authored-by: andrewserong <andrewserong@git.wordpress.org>

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LGTM!

@desrosj
desrosj force-pushed the fix-actions-5.5/fix-phpunit-execution branch from f4f90b8 to a43552f Compare October 23, 2026 14:12

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