tst_qprinter is broken on Linux

********* Start testing of tst_QPrinter *********
Config: Using QTest library 5.0.0, Qt 5.0.0
PASS   : tst_QPrinter::initTestCase()
FAIL!  : tst_QPrinter::getSetCheck() Compared values are not the same
   Loc: [tst_qprinter.cpp(201)]
PASS   : tst_QPrinter::testPageRectAndPaperRect()
PASS   : tst_QPrinter::testSetOptions()
PASS   : tst_QPrinter::testMargins()
QWARN  : tst_QPrinter::testPageSetupDialog() QPageSetupDialog: Cannot be used on non-native printers
PASS   : tst_QPrinter::testPageSetupDialog()
SKIP   : tst_QPrinter::testMulitpleSets(lowResLetter) Current page size is not supported on this printer
   Loc: [tst_qprinter.cpp(471)]
SKIP   : tst_QPrinter::testMulitpleSets(lowResA5) Current page size is not supported on this printer
   Loc: [tst_qprinter.cpp(471)]
SKIP   : tst_QPrinter::testMulitpleSets(midResLetter) Current page size is not supported on this printer
   Loc: [tst_qprinter.cpp(471)]
SKIP   : tst_QPrinter::testMulitpleSets(midResA5) Current page size is not supported on this printer
   Loc: [tst_qprinter.cpp(471)]
SKIP   : tst_QPrinter::testMulitpleSets(highResLetter) Current page size is not supported on this printer
   Loc: [tst_qprinter.cpp(471)]
SKIP   : tst_QPrinter::testMulitpleSets(highResA5) Current page size is not supported on this printer
   Loc: [tst_qprinter.cpp(471)]
PASS   : tst_QPrinter::testPageMargins()
PASS   : tst_QPrinter::changingOutputFormat()
SKIP   : tst_QPrinter::outputFormatFromSuffix() No printers available.
   Loc: [tst_qprinter.cpp(508)]
FAIL!  : tst_QPrinter::setGetPaperSize() Compared values are not the same
   Actual (p.paperSize(QPrinter::Millimeter)): QSizeF(210x297)
   Expected (size): QSizeF(500x10)
   Loc: [tst_qprinter.cpp(523)]
FAIL!  : tst_QPrinter::valuePreservation() Compared values are not the same
   Loc: [tst_qprinter.cpp(765)]
QWARN  : tst_QPrinter::errorReporting() QPainter::begin(): Returned false
PASS   : tst_QPrinter::errorReporting()
FAIL!  : tst_QPrinter::testCustomPageSizes() Compared values are not the same
   Actual (paperSize): QSizeF(8.26772x11.6929)
   Expected (customSize): QSizeF(8.5x11)
   Loc: [tst_qprinter.cpp(885)]
PASS   : tst_QPrinter::printDialogCompleter()
PASS   : tst_QPrinter::testCopyCount()
PASS   : tst_QPrinter::testCurrentPage()
FAIL!  : tst_QPrinter::taskQTBUG4497_reusePrinterOnDifferentFiles() Compared values are not the same
   Actual (file1.readAll()): 25 50 44 46 2D 31 2E 34 0A 31 20 30 20 6F 62 6A 0A 3C 3C 0A 2F 54 69 74 6C 65 20 28 FE FF 29 0A 2F 43 72 65 61 74 6F 72 20 28 FE FF 29 0A 2F 50 72 6F ...
   Expected (file2.readAll()): 25 50 44 46 2D 31 2E 34 0A 31 20 30 20 6F 62 6A 0A 3C 3C 0A 2F 54 69 74 6C 65 20 28 FE FF 29 0A 2F 43 72 65 61 74 6F 72 20 28 FE FF 29 0A 2F 50 72 6F ...
   Loc: [tst_qprinter.cpp(945)]
PASS   : tst_QPrinter::testPdfTitle()
PASS   : tst_QPrinter::cleanupTestCase()
Totals: 13 passed, 5 failed, 7 skipped
********* Finished testing of tst_QPrinter *********