See: https://build.webkit.org/builders/GTK%20Linux%2064-bit%20Release%20%28Tests%29/builds/15871/steps/API%20tests/logs/stdio ERROR:../../Tools/TestWebKitAPI/Tests/WebKitGtk/TestInspectorServer.cpp:154:void testInspectorServerPageList(InspectorServerTest *, gconstpointer): assertion failed (valueString.get() == "http://127.0.0.1:2999/"): ("about:blank" == "http://127.0.0.1:2999/")