umockdev-based tests appear not to play nicely with the sandbox,
often they work but on some systems they persistently fail.

--- a/meson_options.txt
+++ b/meson_options.txt
@@ -60,6 +60,7 @@
 option('systemd_root_prefix', type: 'string', value: '', description: 'Directory to base systemd’s installation directories on')
 option('elogind', type : 'feature', description : 'elogind support', deprecated: {'true': 'enabled', 'false': 'disabled'})
 option('tests', type : 'boolean', value : true, description : 'enable tests')
+option('test-full', type : 'boolean', value : false, description : 'enable tests known to be fragile when called from Gentoo ebuilds')
 option('curl', type : 'feature', description : 'libcurl support', deprecated: {'true': 'enabled', 'false': 'disabled'})
 option('udevdir', type: 'string', value: '', description: 'Directory for udev rules')
 option('efi_os_dir', type: 'string', description : 'the hardcoded name of OS directory in ESP, e.g. fedora')
--- a/plugins/thunderbolt/meson.build
+++ b/plugins/thunderbolt/meson.build
@@ -19,7 +19,7 @@
 plugin_builtins += plugin_builtin_thunderbolt
 
 # we use functions from 2.52 in the tests
-if get_option('tests') and run_sanitize_unsafe_tests and umockdev.found() and gio.version().version_compare('>= 2.52')
+if get_option('tests') and get_option('test-full') and run_sanitize_unsafe_tests and umockdev.found() and gio.version().version_compare('>= 2.52')
   env = environment()
   env.set('G_TEST_SRCDIR', meson.current_source_dir())
   env.set('G_TEST_BUILDDIR', meson.current_build_dir())