CI: regression since #3552069: frequent PHPUnit PostgreSQL CI job failures
>>> [!note] Migrated issue
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<!-- Migrated from issue #3557410. -->
Reported by: [wim leers](https://www.drupal.org/user/99777)
Related to !316
>>>
<h3 id="overview">Overview</h3>
<p>Ever since <span class="drupalorg-gitlab-issue-link drupalorg-gitlab-link-wrapper"><a href="https://git.drupalcode.org/project/canvas/-/work_items/3552069" class="drupalorg-gitlab-link">https://git.drupalcode.org/project/canvas/-/work_items/3552069</a></span> we seem to have very frequent CI failures (see the ocean of ❌ at <a href="https://git.drupalcode.org/project/canvas/-/commits/1.x?ref_type=HEADS">https://git.drupalcode.org/project/canvas/-/commits/1.x?ref_type=HEADS</a>) in <code>SingleDirectoryComponentTest::testDiscovery()</code>:</p>
<pre>1) Drupal\Tests\canvas\Kernel\Plugin\Canvas\ComponentSource\SingleDirectoryComponentTest::testDiscovery<br>Failed asserting that two arrays are identical.<br>--- Expected<br>+++ Actual<br>@@ @@<br> 32 => 'sdc.canvas_test_sdc.two_column',<br> 33 => 'sdc.canvas_test_sdc.video',<br> 34 => 'sdc.sdc_theme_test.bar',<br>- 35 => 'sdc.sdc_theme_test_base.my-card-no-schema',<br>- 36 => 'sdc.sdc_theme_test.lib-overrides',<br>- 37 => 'sdc.sdc_theme_test.my-card',<br>+ 35 => 'sdc.sdc_theme_test.lib-overrides',<br>+ 36 => 'sdc.sdc_theme_test.my-card',<br>+ 37 => 'sdc.sdc_theme_test_base.my-card-no-schema',<br> ]<br><br>/builds/project/canvas/tests/src/Kernel/Plugin/Canvas/ComponentSource/SingleDirectoryComponentTest.php:206</pre><p><img src="https://www.drupal.org/files/issues/2025-11-12/Screenshot%202025-11-12%20at%203.32.06%E2%80%AFPM.png"></p>
<h3 id="proposed-resolution">Proposed resolution</h3>
<h3 id="ui-changes">User interface changes</h3>
issue