FAIL! : tst_qqmllanguage::retrieveQmlTypeId() 'qmlTypeId("testhelper", 1, 0, "PurelyDeclarativeSingleton") >= 0' returned FALSE

********* Start testing of tst_qqmllanguage *********
Config: Using QtTest library 6.9.0, Qt 6.9.0 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 9.3.1 20200406 [revision 6db837a5288ee3ca5ec504fbd5a765817e556ac2]), opensuse-leap 15.5
QWARN  : tst_qqmllanguage::initTestCase() Singleton UncreatableSingleton needs to be a concrete class with either a default constructor or, when adding a default constructor is infeasible, a public static create(QQmlEngine *, QJSEngine *) method.
PASS   : tst_qqmllanguage::initTestCase()
FAIL!  : tst_qqmllanguage::retrieveQmlTypeId() 'qmlTypeId("testhelper", 1, 0, "PurelyDeclarativeSingleton") >= 0' returned FALSE. ()
   Loc: [/home/qt/work/qt/qtdeclarative/tests/auto/qml/qqmllanguage/tst_qqmllanguage.cpp(5801)]
PASS   : tst_qqmllanguage::cleanupTestCase()
Totals: 2 passed, 1 failed, 0 skipped, 0 blacklisted, 64ms
********* Finished testing of tst_qqmllanguage *********