tst_lupdate::good(heuristics) fails on macOS

Module "qt/qttools" (7e4f32ef0850c3a49a3dbf49e0ef76dd6036cc92) Failed test(s): /Users/qt/work/qt/qttools/tests/auto/linguist/lupdate:
 agent:2016/10/17 16:52:47 build.go:323: Executing instruction 28 of 43
 agent:2016/10/17 16:52:47 build.go:270: [make check -j1] 900 1200
 /Users/qt/work/qt/qttools/tests/auto/linguist/lupdate/target_wrapper.sh  ./tst_lupdate.app/Contents/MacOS/tst_lupdate -o /Users/qt/work/testresults/tests/auto/linguist/lupdate214472038,xml -o -,txt
 ********* Start testing of tst_lupdate *********
 Config: Using QtTest library 5.8.0, Qt 5.8.0 (x86_64-little_endian-lp64 shared (dynamic) release build; by Clang 6.0 (clang-600.0.57) (Apple))
 PASS   : tst_lupdate::initTestCase()
 QDEBUG : tst_lupdate::good(cmdline_deeppath) Checking...
 PASS   : tst_lupdate::good(cmdline_deeppath)
 QDEBUG : tst_lupdate::good(cmdline_order) Checking...
 PASS   : tst_lupdate::good(cmdline_order)
 QDEBUG : tst_lupdate::good(cmdline_recurse) Checking...
 PASS   : tst_lupdate::good(cmdline_recurse)
 QDEBUG : tst_lupdate::good(codecforsrc) Checking...
 PASS   : tst_lupdate::good(codecforsrc)
 QDEBUG : tst_lupdate::good(from_subdir) Checking...
 PASS   : tst_lupdate::good(from_subdir)
 QDEBUG : tst_lupdate::good(heuristics) Checking...
 FAIL!  : tst_lupdate::good(heuristics) Output for /Users/qt/work/qt/qttools/tests/auto/linguist/lupdate/testdata/good/heuristics/expectedoutput.txt does not meet expectations:
 <<<<<<< got
 WARNING: /bin/sh: EXPORT_QMAKE_XARCH_CFLAGS: command not found
 =========
 >>>>>>> expected
 Updating 'project.ts'...
     Found 3 source text(s) (3 new and 0 already existing)
     Removed 5 obsolete entries
 
    Loc: [tst_lupdate.cpp(203)]
 QDEBUG : tst_lupdate::good(lacksqobject) Checking...
 PASS   : tst_lupdate::good(lacksqobject)
 ...
 PASS   : tst_lupdate::cleanupTestCase()
 Totals: 48 passed, 1 failed, 0 skipped, 0 blacklisted, 60260ms
 ********* Finished testing of tst_lupdate *********
 make: *** [check] Error 1