diff --git a/test/staging/Temporal/Regex/old/plaintime.js b/test/staging/Temporal/Regex/old/plaintime.js
index 130303692c..1055bc8964 100644
--- a/test/staging/Temporal/Regex/old/plaintime.js
+++ b/test/staging/Temporal/Regex/old/plaintime.js
@@ -45,7 +45,6 @@ function generateTest(dateTimeString, zoneString) {
   "[Europe/Vienna]",
   "+01:00[Custom/Vienna]",
   "-04:00",
-  "Z",
   ""
 ].forEach(zoneStr => test(`15${ zoneStr }`, [15]));
 [