See https://integration.wikimedia.org/ci/job/quibble-vendor-mysql-php83/64624/console
17:59:10 FAILED TESTS: 17:59:10 mw.FormDataTransport 17:59:10 ✖ upload 17:59:10 Firefox 140.0 (Linux 0.0.0) 17:59:10 Expected: "/api.php" 17:59:10 Actual: "/api.php?action=query" 17:59:10 @http://localhost:9876/load.php?modules=%40wikimedia%2Fcodex%2Ccodex-styles%2Cmoment%2Coojs%2Coojs-ui-core%2Coojs-ui-widgets%2Coojs-ui-windows%2Cpinia%2Csinonjs%2Cvue%2Cvue-test-utils%7Cext.eventLogging%7Cext.eventLogging.metricsPlatform%7Cjquery.client%2ChighlightText%2ClengthLimit%2CmakeCollapsible%2Cspinner%2Ctablesorter%2CtextSelection%7Cjquery.makeCollapsible.styles%7Cjquery.spinner.styles%7Cjquery.tablesorter.styles%7Cmediawiki.DateFormatter%2CForeignApi%2CString%2CTitle%2CUri%2Capi%2Ccldr%2CconfirmCloseWindow%2Ccookie%2Cdeflate%2Cexperiments%2Cfeedback%2Cinspect%2CjqueryMsg%2Clanguage%2CmessagePoster%2Cqunit-testrunner%2Crouter%2Cstorage%2Ctemplate%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%2Cwidgets%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.language.grammar.testdata%7Cmediawiki.language.jqueryMsg.testdata%7Cmediawiki.language.months%2Ctestdata%7Cmediawiki.libs.jpegmeta%2Cpluralruleparser%7Cmediawiki.page.ready%7Cmediawiki.pager.codex%7Cmediawiki.rcfilters.filters.ui%7Cmediawiki.special.block.codex%7Cmediawiki.template.mustache%7Cmediawiki.widgets.CategoryMultiselectWidget%2CDateInputWidget%2CMediaSearch%2CTable%2CUserInputWidget%2Cstyles%7Cmediawiki.widgets.DateInputWidget.styles%7Coojs-ui-core.icons%2Cstyles%7Coojs-ui-widgets.icons%7Coojs-ui-windows.icons%7Coojs-ui.styles.icons-alerts%2Cicons-content%2Cicons-editing-advanced%2Cicons-editing-core%2Cicons-editing-styling%2Cicons-interactions%2Cicons-layout%2Cicons-location%2Cicons-media%2Cicons-moderation%2Cicons-movement%2Cindicators%7Cskins.vector.clientPreferences%7Ctest.EventLogging%2CMediaWiki%2CUpload%20Wizard%2CVector&version=14h9p:2831:512 17:59:10 17:59:10 17:59:10 ✖ uploadChunk 17:59:10 Firefox 140.0 (Linux 0.0.0) 17:59:10 Expected: "/api.php" 17:59:10 Actual: "/api.php?action=query" 17:59:10 @http://localhost:9876/load.php?modules=%40wikimedia%2Fcodex%2Ccodex-styles%2Cmoment%2Coojs%2Coojs-ui-core%2Coojs-ui-widgets%2Coojs-ui-windows%2Cpinia%2Csinonjs%2Cvue%2Cvue-test-utils%7Cext.eventLogging%7Cext.eventLogging.metricsPlatform%7Cjquery.client%2ChighlightText%2ClengthLimit%2CmakeCollapsible%2Cspinner%2Ctablesorter%2CtextSelection%7Cjquery.makeCollapsible.styles%7Cjquery.spinner.styles%7Cjquery.tablesorter.styles%7Cmediawiki.DateFormatter%2CForeignApi%2CString%2CTitle%2CUri%2Capi%2Ccldr%2CconfirmCloseWindow%2Ccookie%2Cdeflate%2Cexperiments%2Cfeedback%2Cinspect%2CjqueryMsg%2Clanguage%2CmessagePoster%2Cqunit-testrunner%2Crouter%2Cstorage%2Ctemplate%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%2Cwidgets%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.language.grammar.testdata%7Cmediawiki.language.jqueryMsg.testdata%7Cmediawiki.language.months%2Ctestdata%7Cmediawiki.libs.jpegmeta%2Cpluralruleparser%7Cmediawiki.page.ready%7Cmediawiki.pager.codex%7Cmediawiki.rcfilters.filters.ui%7Cmediawiki.special.block.codex%7Cmediawiki.template.mustache%7Cmediawiki.widgets.CategoryMultiselectWidget%2CDateInputWidget%2CMediaSearch%2CTable%2CUserInputWidget%2Cstyles%7Cmediawiki.widgets.DateInputWidget.styles%7Coojs-ui-core.icons%2Cstyles%7Coojs-ui-widgets.icons%7Coojs-ui-windows.icons%7Coojs-ui.styles.icons-alerts%2Cicons-content%2Cicons-editing-advanced%2Cicons-editing-core%2Cicons-editing-styling%2Cicons-interactions%2Cicons-layout%2Cicons-location%2Cicons-media%2Cicons-moderation%2Cicons-movement%2Cindicators%7Cskins.vector.clientPreferences%7Ctest.EventLogging%2CMediaWiki%2CUpload%20Wizard%2CVector&version=14h9p:2832:50
On my local using MediaWiki-Docker and Fresh, this is failing on the master branch.
The failure is preventing the merge of r1271103 which needs to go out before next Monday, April 20.