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Repair wp/5.9 branch Actions: Pin phpunit/phpunit to a PHP 5.6/7.0-compatible release - #84415

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@desrosj desrosj commented Oct 9, 2026 •

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Part of #82934.

What?

  • Lowers the phpunit/phpunit dev dependency from ^8.5 to ^5.7 (resolves to 5.7.27), so the PHP 5.6 unit test jobs can load the plugin's Composer autoloader.
  • Changes config.platform.php from 8.1 to 5.6.20, and ignores five Composer advisories, so that version can resolve.
  • Regenerates composer.lock with composer update phpunit/phpunit --with-all-dependencies.

Why?

Both PHP 5.6 jobs fail before any test runs:

Parse error: syntax error, unexpected ':', expecting ';' or '{' in .../vendor/phpunit/phpunit/src/Runner/Version.php on line 34

wp-phpunit/wp-phpunit calls class_exists( 'PHPUnit\Runner\Version' ), which loads the class from the locked phpunit/phpunit 8.5.21. Its return type declarations don't parse on PHP 5.6. PHPUnit 5.7.27 has no namespaced PHPUnit\Runner\Version, so the check returns false and wp-phpunit falls back to PHPUnit_Runner_Version.

wp/6.0 makes the same change in #84281. This branch also needs:

How?

Only phpunit/phpunit's dependency tree changes in composer.lock: 22 packages updated, phpunit/phpunit-mock-objects 3.4.4 and symfony/yaml v3.4.47 added, and five phar-io/sebastian/theseer packages removed. wp-phpunit/wp-phpunit 5.9.17, yoast/phpunit-polyfills, composer/installers and the PHPCS packages keep their versions.

The PHP 7.4, 8.0 and 8.1 jobs use the PHPUnit bundled in their Docker image, not the one in vendor.

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.

🤖 Generated with Claude Code

@desrosj desrosj added the [Type] Build Tooling Issues or PRs related to build tooling label Oct 9, 2026
@desrosj desrosj self-assigned this Oct 9, 2026
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@desrosj
desrosj added this pull request to stack #84427 October 9, 2026 16:48
@desrosj
desrosj removed this pull request from stack #84427 October 10, 2026 00:16
@desrosj
desrosj changed the base branch from fix-actions-5.9/fix-setup-teardown-polyfills to wp/5.9 October 10, 2026 00:17
@desrosj
desrosj force-pushed the fix-actions-5.9/fix-phpunit-dev-dependency-floor branch from f3978cc to 6e42991 Compare October 10, 2026 00:19
@desrosj
desrosj changed the base branch from wp/5.9 to fix-actions-5.9/fix-setup-teardown-polyfills October 10, 2026 00:21
@desrosj
desrosj added this pull request to stack #84490 October 10, 2026 00:21
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desrosj marked this pull request as ready for review October 13, 2026 01:02
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@desrosj
desrosj force-pushed the fix-actions-5.9/fix-phpunit-dev-dependency-floor branch from 8970e53 to 3d2accf Compare October 21, 2026 15:43
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desrosj removed this pull request from stack #84490 October 21, 2026 15:57
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desrosj added this pull request to stack #85300 October 21, 2026 15:58
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desrosj removed this pull request from stack #85300 October 21, 2026 19:47
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desrosj added this pull request to stack #85350 October 21, 2026 19:47

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The failing checks pass at the top of this stack (#85349).

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