diff --git a/test/units/TEST-04-JOURNAL.invocation.sh b/test/units/TEST-04-JOURNAL.invocation.sh
index 74db1040fd..39ac26131c 100755
--- a/test/units/TEST-04-JOURNAL.invocation.sh
+++ b/test/units/TEST-04-JOURNAL.invocation.sh
@@ -18,6 +18,7 @@ TMP_DIR=$(mktemp -d)
 # service stdout will not contain _SYSTEMD_INVOCATION_ID field.
 SAVED_LOG_LEVEL=$(systemctl log-level)
 systemctl log-level info
+journalctl --rotate
 
 # Note, if the service exits extremely fast, journald cannot find the source of the
 # stream. Hence, we need to call 'journalctl --sync' before service exits.