See for example https://integration.wikimedia.org/ci/job/mwext-Math-testextension-zend/5/console
ResourcesTest::testMissingDependencies The module 'ext.visualEditor.mwcore' required by 'ext.math.visualEditor' must exist Failed asserting that an array contains 'ext.visualEditor.mwcore'. /srv/ssd/jenkins-slave/workspace/mwext-Math-testextension-zend/src/tests/phpunit/structure/ResourcesTest.php:74 /srv/ssd/jenkins-slave/workspace/mwext-Math-testextension-zend/src/tests/phpunit/MediaWikiTestCase.php:141
ResourcesTest::testUnsatisfiableDependencies Undefined index: ext.visualEditor.mwcore /srv/ssd/jenkins-slave/workspace/mwext-Math-testextension-zend/src/tests/phpunit/structure/ResourcesTest.php:94 /srv/ssd/jenkins-slave/workspace/mwext-Math-testextension-zend/src/tests/phpunit/MediaWikiTestCase.php:141
Both fixed by https://gerrit.wikimedia.org/r/#/c/183864/
There are a few more MathCoverageTest::testCoverage failing though.
for example
MathCoverageTest::testCoverage with data set #12 ('\\hat{a}, \\widehat{a}, \\vec{a} \\!', '<img class="mwe-math-fallback-image-inline tex" alt="\\hat{a}, \\widehat{a}, \\vec{a} \\!" src="eaededf26bb201c699ef1597902383c3.png" />')
Failed to render \hat{a}, \widehat{a}, \vec{a} \!
Failed asserting that two strings are equal.
--- Expected
+++ Actual
@@ @@
-'<img class="mwe-math-fallback-image-inline tex" alt="\hat{a}, \widehat{a}, \vec{a} \!" src="eaededf26bb201c699ef1597902383c3.png" />'
+'<img class="mwe-math-fallback-image-inline tex" alt="\hat{a}, \widehat{a}, \vec{a} \!" src="731677a388ba08f520ebe91623dab74a.png" />'
/srv/ssd/jenkins-slave/workspace/mwext-Math-testextension-zend/src/extensions/Math/tests/MathCoverageTest.php:75
/srv/ssd/jenkins-slave/workspace/mwext-Math-testextension-zend/src/tests/phpunit/MediaWikiTestCase.php:141It seems, that the visual impression of the renderd expression is unchanged. But some minor difference seems to have caused a change of the hash value.