There are two errors in Wikibase CI builds (example build):
1) WikibaseQuality\ConstraintReport\Tests\Specials\SpecialConstraintReportTest::testExecute with data set "valid input - existing item" ('$id', array(), 'qqx', array(Hamcrest\Core\CombinableMatcher Object (...), Hamcrest\Core\CombinableMatcher Object (...), Hamcrest\Core\CombinableMatcher Object (...), Hamcrest\Core\CombinableMatcher Object (...), Hamcrest\Core\CombinableMatcher Object (...), WMDE\HamcrestHtml\ComplexTagMatcher Object (...), Hamcrest\Core\CombinableMatcher Object (...), Hamcrest\Core\CombinableMatcher Object (...), Hamcrest\Core\CombinableMatcher Object (...), Hamcrest\Core\CombinableMatcher Object (...), Hamcrest\Core\CombinableMatcher Object (...), Hamcrest\Core\CombinableMatcher Object (...)))
Hamcrest\AssertionError: Failed to assert output: result for
Expected: is valid html piece having child (with tag name "h3" and having text contents a string containing "(wbqc-constraintreport-result-headline) ")
but: valid html piece having no children (with tag name "h3" and having text contents a string containing "(wbqc-constraintreport-result-headline) ")
Actual html:
<div class="wbqc-explanation"><p>(wbqc-constraintreport-explanation-part-one)</p><p>(wbqc-constraintreport-explanation-part-two)</p></div><div class='mw-htmlform-ooui-wrapper oo-ui-layout oo-ui-panelLayout'><form action='/index.php/Special:ConstraintReport' method='post' enctype='application/x-www-form-urlencoded' class='mw-htmlform mw-htmlform-ooui oo-ui-layout oo-ui-formLayout'><input type="hidden" value="Special:ConstraintReport" name="title">
<div class='oo-ui-layout oo-ui-panelLayout oo-ui-panelLayout-padded oo-ui-panelLayout-framed'><fieldset class='oo-ui-layout oo-ui-labelElement oo-ui-fieldsetLayout'><legend class='oo-ui-fieldsetLayout-header'><span class='oo-ui-iconElement-icon oo-ui-iconElement-noIcon'></span><span class='oo-ui-labelElement-label'>(wbqc-constraintreport-form-section)</span></legend><div class='oo-ui-fieldsetLayout-group'><div class='oo-ui-widget oo-ui-widget-enabled'><div id="mw-htmlform-section"><div id='ooui-php-1234' class='mw-htmlform-field-HTMLTextField wbqc-constraintreport-form-entity-id oo-ui-layout oo-ui-labelElement oo-ui-fieldLayout oo-ui-fieldLayout-align-top' data-ooui='{"_":"mw.htmlform.FieldLayout","fieldWidget":{"tag":"mw-input-entityid"},"align":"top","helpInline":true,"$overlay":true,"label":{"html":"(wbqc-constraintreport-form-entityid-label)"},"classes":["mw-htmlform-field-HTMLTextField","wbqc-constraintreport-form-entity-id"]}'><div class='oo-ui-fieldLayout-body'><span class='oo-ui-fieldLayout-header'><label for='ooui-php-1233' class='oo-ui-labelElement-label'>(wbqc-constraintreport-form-entityid-label)</label></span><div class='oo-ui-fieldLayout-field'><div id='mw-input-entityid' class='wbqc-constraintreport-form-entity-id oo-ui-widget oo-ui-widget-enabled oo-ui-inputWidget oo-ui-textInputWidget oo-ui-textInputWidget-type-text oo-ui-textInputWidget-php' data-ooui='{"_":"OO.ui.TextInputWidget","placeholder":"(wbqc-constraintreport-form-entityid-placeholder)","name":"entityid","inputId":"ooui-php-1233","required":false,"classes":["wbqc-constraintreport-form-entity-id"]}'><input type='text' tabindex='0' name='entityid' value='' placeholder='(wbqc-constraintreport-form-entityid-placeholder)' id='ooui-php-1233' class='oo-ui-inputWidget-input' /><span class='oo-ui-iconElement-icon oo-ui-iconElement-noIcon'></span><span class='oo-ui-indicatorElement-indicator oo-ui-indicatorElement-noIndicator'></span></div></div></div></div></div></div></div></fieldset></div>
<input id="wpEditToken" type="hidden" value="+\" name="wpEditToken">
<div class="mw-htmlform-submit-buttons">
<span id='ooui-php-1235' class='mw-htmlform-submit oo-ui-widget oo-ui-widget-enabled oo-ui-inputWidget oo-ui-buttonElement oo-ui-buttonElement-framed oo-ui-labelElement oo-ui-flaggedElement-primary oo-ui-flaggedElement-progressive oo-ui-buttonInputWidget' data-ooui='{"_":"OO.ui.ButtonInputWidget","type":"submit","value":"(wbqc-constraintreport-form-submit-label)","label":"(wbqc-constraintreport-form-submit-label)","flags":["primary","progressive"],"classes":["mw-htmlform-submit"]}'><button type='submit' tabindex='0' value='(wbqc-constraintreport-form-submit-label)' class='oo-ui-inputWidget-input oo-ui-buttonElement-button'><span class='oo-ui-iconElement-icon oo-ui-iconElement-noIcon oo-ui-image-invert'></span><span class='oo-ui-labelElement-label'>(wbqc-constraintreport-form-submit-label)</span><span class='oo-ui-indicatorElement-indicator oo-ui-indicatorElement-noIndicator oo-ui-image-invert'></span></button></span></div>
</form></div><p class="wbqc-constraintreport-notice wbqc-constraintreport-notice-error">(wbqc-constraintreport-not-existent-entity)</p>
/workspace/src/vendor/hamcrest/hamcrest-php/hamcrest/Hamcrest/MatcherAssert.php:115
/workspace/src/vendor/hamcrest/hamcrest-php/hamcrest/Hamcrest/MatcherAssert.php:63
/workspace/src/vendor/hamcrest/hamcrest-php/hamcrest/Hamcrest.php:28
/workspace/src/tests/phpunit/HamcrestPHPUnitIntegration.php:32
/workspace/src/extensions/WikibaseQualityConstraints/tests/phpunit/Specials/SpecialConstraintReportTest.php:1591) PropertySuggester\GetSuggestionsTest::testExecutionWithRedirect Failed asserting that exception message 'Could not find an entity with the ID "Q1".' contains 'The given entity ID refers to a redirect, which is not supported in this context.'.
I can reproduce both locally, and both pass again if I locally revert Replace MediaWikiIntegrationTestCase::$tablesUsed with automatic query tracking (T342301).