test: don't hang indefinitely on no match

diff --git a/test/units/testsuite-75.sh b/test/units/testsuite-75.sh
index d36cab2923ec05151e2e92142669dd0920010a95..ddd86d09bb247427c73f8ce3619d7a83be9dcf99 100755 (executable)
--- a/test/units/testsuite-75.sh
+++ b/test/units/testsuite-75.sh
@@ -41,7 +41,7 @@ monitor_check_rr() (
     # displayed. We turn off pipefail for this, since we don't care about the
     # lhs of this pipe expression, we only care about the rhs' result to be
     # clean
-    journalctl -u resmontest.service --since "$since" -f --full | grep -m1 "$match"
+    timeout -v 30s journalctl -u resmontest.service --since "$since" -f --full | grep -m1 "$match"
 )
 
 # Test for resolvectl, resolvconf