tst_qaudiodecoderbackend fails on SuSe, rhel, osx and windows

 
  QtQA::App::TestRunner: begin tst_qaudiodecoderbackend: [./tst_qaudiodecoderbackend] [-silent] [-o] [/work/ci/qt/qt5/dev/_artifacts/test-logs/tst_qaudiodecoderbackend-testresults-00.xml,xml] [-o] [-,txt]
  Testing tst_QAudioDecoderBackend
  FAIL!  : tst_QAudioDecoderBackend::fileTest() Compared values are not the same
     Actual   (d.sourceFilename())         : ""
     Expected (fileInfo.absoluteFilePath()): "/work/build/qtmultimedia/tests/auto/integration/qaudiodecoderbackend/testdata/test.wav"
     Loc: [tst_qaudiodecoderbackend.cpp(96)]
  FAIL!  : tst_QAudioDecoderBackend::unsupportedFileTest() Compared values are not the same
     Actual   (d.sourceFilename())         : ""
     Expected (fileInfo.absoluteFilePath()): "/work/build/qtmultimedia/tests/auto/integration/qaudiodecoderbackend/testdata/test-unsupported.avi"
     Loc: [tst_qaudiodecoderbackend.cpp(275)]
  FAIL!  : tst_QAudioDecoderBackend::corruptedFileTest() Compared values are not the same
     Actual   (d.sourceFilename())         : ""
     Expected (fileInfo.absoluteFilePath()): "/work/build/qtmultimedia/tests/auto/integration/qaudiodecoderbackend/testdata/test-corrupted.wav"
     Loc: [tst_qaudiodecoderbackend.cpp(351)]
  FAIL!  : tst_QAudioDecoderBackend::deviceTest() 'd.sourceDevice() == &file' returned FALSE. ()
     Loc: [tst_qaudiodecoderbackend.cpp(433)]
  Totals: 2 passed, 4 failed, 0 skipped, 0 blacklisted
  QtQA::App::TestRunner: test failed, running again to see if it is flaky...