diff --git a/tests/test-timezone-support b/tests/test-timezone-support
index adcfdfef..554b5743 100755
--- a/tests/test-timezone-support
+++ b/tests/test-timezone-support
@@ -32,7 +32,8 @@ BANNER %
 REM Fri AT 23:30 TZ America/Toronto +1000 SATISFY [$Td == 13] MSG Fri 13th @23:30 Eastern is %a %2 here
 SET a $T
 SET b $Tt
-MSG a = [a], b = [b]
+set c trigtz()
+MSG a = [a], b = [b], c = [c]
 EOF
 
 TZ=Europe/Amsterdam $REMIND - 2026-02-14@14:00 <<'EOF' >> $OUT 2>&1
@@ -41,7 +42,8 @@ BANNER %
 REM Fri AT 23:30 TZ America/Toronto +1000 SATISFY [$Td == 13] MSG Fri 13th @23:30 Eastern is %a %2 here
 SET a $T
 SET b $Tt
-MSG a = [a], b = [b]
+set c trigtz()
+MSG a = [a], b = [b], c = [c]
 EOF
 
 TZ=Europe/Amsterdam $REMIND - 2026-02-15@14:00 <<'EOF' >> $OUT 2>&1
@@ -66,6 +68,8 @@ SET full  '2026-01-03@05:04'
 SET last  '2026-01-10@10:49'
 
 REM [new]   +100 MSG New Moon      %*l %3.
+SET a trigtz()
+REM MSG trigtz = [a]
 REM [first] +100 MSG First Quarter %*l %3.
 REM [full]  +100 MSG Full Moon     %*l %3.
 REM [last]  +100 MSG Last Quarter  %*l %3.
@@ -76,6 +80,8 @@ SET full  tzconvert(full,  "America/Toronto", "Australia/Sydney")
 SET last  tzconvert(last,  "America/Toronto", "Australia/Sydney")
 
 REM [new]   +100 TZ Australia/Sydney MSG New Moon      %*l %3. (*)
+SET a trigtz()
+REM MSG trigtz = [a]
 REM [first] +100 TZ Australia/Sydney MSG First Quarter %*l %3. (*)
 REM [full]  +100 TZ Australia/Sydney MSG Full Moon     %*l %3. (*)
 REM [last]  +100 TZ Australia/Sydney MSG Last Quarter  %*l %3. (*)
diff --git a/tests/tz.cmp b/tests/tz.cmp
index 2064d23b..9b5bf0fc 100644
--- a/tests/tz.cmp
+++ b/tests/tz.cmp
@@ -1,7 +1,7 @@
 Fri 13th @23:30 Eastern is on Saturday, 14 February, 2026 at 5:30am here
-a = 2026-02-14, b = 05:30
+a = 2026-02-14, b = 05:30, c = America/Toronto
 Fri 13th @23:30 Eastern is today at 5:30am here
-a = 2026-02-14, b = 05:30
+a = 2026-02-14, b = 05:30, c = America/Toronto
 Fri 13th @23:30 Eastern is on Saturday, 14 March, 2026 at 4:30am here
 a = 2026-03-14, b = 04:30
 2025/01/09 * * * 540 9:00am Locally: at 09:00
@@ -16,6 +16,8 @@ a = 2026-03-14, b = 04:30
 2025/10/09 * * * 540 9:00am Locally: at 09:00
 2025/11/13 * * * 540 9:00am Locally: at 09:00
 2025/12/11 * * * 540 9:00am Locally: at 09:00
+trigtz = 
+trigtz = Australia/Sydney
 new=2026-01-19@06:53 first=2026-01-26@15:48 full=2026-01-03@21:04 last=2026-01-11@02:49
 Full Moon     2026-01-03 at 05:04.
 Full Moon     2026-01-03 at 05:04. (*)