diff --git a/test/units/TEST-53-TIMER.RandomizedDelaySec-reload.sh b/test/units/TEST-53-TIMER.RandomizedDelaySec-reload.sh
index e9b9d4feee..2baa47c028 100755
--- a/test/units/TEST-53-TIMER.RandomizedDelaySec-reload.sh
+++ b/test/units/TEST-53-TIMER.RandomizedDelaySec-reload.sh
@@ -84,7 +84,7 @@ check_elapse_timestamp
 # elapse timestamp (this goes through a slightly different codepath that actually contained the original
 # issue).
 : "Next elapse timestamp after time jump"
-date -s "tomorrow 00:10"
+date --set="tomorrow 00:10"
 check_elapse_timestamp
 
 : "Next elapse timestamp after daemon-reload"
diff --git a/test/units/TEST-53-TIMER.issue-16347.sh b/test/units/TEST-53-TIMER.issue-16347.sh
index 8b266145cd..b4867872da 100755
--- a/test/units/TEST-53-TIMER.issue-16347.sh
+++ b/test/units/TEST-53-TIMER.issue-16347.sh
@@ -4,8 +4,8 @@ set -eux
 set -o pipefail
 
 # Reset host date to current time, 3 days in the past.
-date -s "-3 days"
-trap 'date -s "+3 days"' EXIT
+date --set="-3 days"
+trap 'date --set="+3 days"' EXIT
 
 # Run a timer for every 15 minutes.
 systemd-run --unit test-timer --on-calendar "*:0/15:0" true
diff --git a/test/units/TEST-53-TIMER.restart-trigger.sh b/test/units/TEST-53-TIMER.restart-trigger.sh
index e5cd575d66..71de99cf27 100755
--- a/test/units/TEST-53-TIMER.restart-trigger.sh
+++ b/test/units/TEST-53-TIMER.restart-trigger.sh
@@ -37,8 +37,8 @@ JOURNAL_TS="$(date "+%s")"
 systemctl restart "$UNIT_NAME.timer"
 systemctl status "$UNIT_NAME.timer"
 
-date -s '+2 hours'
-trap 'date -s "-2 hours"' EXIT
+date --set='+2 hours'
+trap 'date --set="-2 hours"' EXIT
 sleep 1
 systemctl status "$UNIT_NAME.timer"
 assert_eq "$(journalctl -q -p info --since="@$JOURNAL_TS" --unit="$UNIT_NAME" --grep="$TEST_MESSAGE" | wc -l)" "1"