diff --git a/test/units/TEST-45-TIMEDATE.sh b/test/units/TEST-45-TIMEDATE.sh
index c1fa30e206..820c3ae9f5 100755
--- a/test/units/TEST-45-TIMEDATE.sh
+++ b/test/units/TEST-45-TIMEDATE.sh
@@ -224,6 +224,9 @@ assert_timedated_signal() {
 
     for _ in {0..9}; do
         if journalctl "${args[@]}" --grep .; then
+            # Make the found entry in the archived journal, to avoid the following failure:
+            # Journal file /run/log/journal/.../system.journal is truncated, ignoring file.
+            journalctl --rotate
             [[ "$(journalctl "${args[@]}" -o cat | jq -r '.payload.data[1].NTP.data')" == "$value" ]];
             return 0
         fi
@@ -304,6 +307,9 @@ assert_timesyncd_signal() {
 
     for _ in {0..9}; do
         if journalctl "${args[@]}" --grep .; then
+            # Make the found entry in the archived journal, to avoid the following failure:
+            # Journal file /run/log/journal/.../system.journal is truncated, ignoring file.
+            journalctl --rotate
             [[ "$(journalctl "${args[@]}" -o cat | jq -r ".payload.data[1].$property.data | join(\" \")")" == "$value" ]];
             return 0
         fi