make[3]: Entering directory `/var/tmp/portage/xfce-base/thunar-0.8.0-r1/work/Thunar-0.8.0/tests' (lt-test-thunar-vfs-path:20987): Gtk-WARNING **: Locale not supported by C library. Using the fallback 'C' locale. (lt-test-thunar-vfs-path:20987): Gtk-WARNING **: cannot open display: FAIL: test-thunar-vfs-path ========================================== 1 of 1 tests failed Please report to http://bugzilla.xfce.org/ ========================================== make[3]: *** [check-TESTS] Error 1 make[3]: Leaving directory `/var/tmp/portage/xfce-base/thunar-0.8.0-r1/work/Thunar-0.8.0/tests' make[2]: *** [check-am] Error 2 make[2]: Leaving directory `/var/tmp/portage/xfce-base/thunar-0.8.0-r1/work/Thunar-0.8.0/tests' make[1]: *** [check-recursive] Error 1 make[1]: Leaving directory `/var/tmp/portage/xfce-base/thunar-0.8.0-r1/work/Thunar-0.8.0/tests' make: *** [check-recursive] Error 1
Fixed by using Xemake in src_test from virtualx.eclass.