new gdbus-server-auth test fails on FreeBSD: Error binding to address: No such file or directory

Job #482322 failed for 4e8d0588:

165/261 glib:gio / gdbus-server-auth            FAIL     0.04 s (killed by signal 6 SIGABRT)

--- command ---
GIO_MODULE_DIR='' GIO_LAUNCH_DESKTOP='/var/tmp/gitlab_runner/builds/3fe11159/0/GNOME/glib/_build/gio/gio-launch-desktop' G_TEST_SRCDIR='/var/tmp/gitlab_runner/builds/3fe11159/0/GNOME/glib/gio/tests' G_TEST_BUILDDIR='/var/tmp/gitlab_runner/builds/3fe11159/0/GNOME/glib/_build/gio/tests' /var/tmp/gitlab_runner/builds/3fe11159/0/GNOME/glib/_build/gio/tests/gdbus-server-auth
--- stdout ---
# random seed: R02S3e6b43d2f5fca5872931052b8f50e72a
1..7
# Start of gdbus tests
# Testing GDBus server at unix:tmpdir=/tmp/gdbus-test / libdbus client, with flags: external:false anonymous:false sha1:false tcp:false
Bail out! GLib-GIO:ERROR:../gio/tests/gdbus-server-auth.c:331:do_test_server_auth: assertion failed (error == NULL): Error binding to address: No such file or directory (g-io-error-quark, 1)
--- stderr ---
**
GLib-GIO:ERROR:../gio/tests/gdbus-server-auth.c:331:do_test_server_auth: assertion failed (error == NULL): Error binding to address: No such file or directory (g-io-error-quark, 1)
-------

I think the test probably just needs to use unix:tmpdir=/tmp, or create a temporary directory and use that.