test: Be sure that gvfs is used by gio

Currently the tests may fail with:
Error mounting location: volume doesn't implement mount

This may happen if GIO_USE_VFS=local, which is currently set by
gnome-desktop-testing as defaults.

Set GIO_USE_VFS=gvfs for our process to fix it.

https://bugzilla.gnome.org/show_bug.cgi?id=734370

1 files changed, 2 insertions, 0 deletions

diff --git a/test/gvfs-test b/test/gvfs-test
index d180d9ab..662a9dcb 100755
--- a/test/gvfs-test
+++ b/test/gvfs-test
@@ -37,6 +37,8 @@ from glob import glob
 
 from gi.repository import GLib, Gio
 
+os.environ['GIO_USE_VFS'] = 'gvfs'
+
 try:
     import gi
     gi.require_version('UMockdev', '1.0')