diff --git a/test/units/TEST-74-AUX-UTILS.busctl.sh b/test/units/TEST-74-AUX-UTILS.busctl.sh
index b8ae8da5682..875f353b00e 100755
--- a/test/units/TEST-74-AUX-UTILS.busctl.sh
+++ b/test/units/TEST-74-AUX-UTILS.busctl.sh
@@ -146,10 +146,10 @@ busctl get-property -j \
 
 busctl --quiet --timeout=1 --limit-messages=1 --match "interface=org.freedesktop.systemd1.Manager" monitor
 
-START_USEC=$(date +%s%6N)
+START_NSEC=$(date +%s%N)
 busctl --quiet --timeout=500ms --match "interface=io.dontexist.NeverGonnaHappen" monitor
-END_USEC=$(date +%s%6N)
-USEC=$((END_USEC-START_USEC))
+END_NSEC=$(date +%s%N)
+NSEC=$((END_NSEC-START_NSEC))
 # Validate that the above was delayed for at least 500ms, but at most 30s (some leeway for slow CIs)
-test "$USEC" -gt 500000
-test "$USEC" -lt 30000000
+test "$NSEC" -gt 500000000
+test "$NSEC" -lt 30000000000