test: disable background color for nspawn containers

As it makes the logs really messy in certain tests.

diff --git a/test/test-functions b/test/test-functions
index c62cf3d52182796088e53f58fc30b1426d0de1f1..33575d3b3aefd08bf2b88c1702494b0cef8726eb 100644 (file)
--- a/test/test-functions
+++ b/test/test-functions
@@ -662,6 +662,7 @@ run_nspawn() {
         "--directory=${1:?}"
         "--setenv=SYSTEMD_UNIT_PATH=/usr/lib/systemd/tests/testdata/testsuite-$2.units:/usr/lib/systemd/tests/testdata/units:"
         "--machine=TEST-$TESTID"
+        "--background=''"
     )
     local kernel_params=(
         "$PATH_TO_INIT"