diff --git a/test/jdk/sun/util/resources/cldr/TimeZoneNamesTest.java b/test/jdk/sun/util/resources/cldr/TimeZoneNamesTest.java
index 60359b8fbd4e0..f9610436bc9e5 100644
--- a/test/jdk/sun/util/resources/cldr/TimeZoneNamesTest.java
+++ b/test/jdk/sun/util/resources/cldr/TimeZoneNamesTest.java
@@ -57,8 +57,8 @@ private static Object[][] sampleTZs() {
         return new Object[][] {
             // tzid, locale, style, expected
 
-            // This list is as of CLDR version 48, and should be examined
-            // on the CLDR data upgrade.
+            // This list is current as of CLDR 48.2 and should be reviewed
+            // whenever the CLDR data is upgraded.
 
             // no "metazone" zones (some of them were assigned metazones
             // over time, thus they are not "generated" per se
@@ -300,12 +300,14 @@ private static Object[][] sampleTZs() {
 
     private static Stream<Arguments> explicitDstOffsets() {
         return Stream.of(
-            Arguments.of(ZonedDateTime.of(2026, 4, 5, 0, 0, 0, 0, ZoneId.of("Europe/Dublin")), "Irish Standard Time"),
-            Arguments.of(ZonedDateTime.of(2026, 12, 5, 0, 0, 0, 0, ZoneId.of("Europe/Dublin")), "Greenwich Mean Time"),
-            Arguments.of(ZonedDateTime.of(2026, 4, 5, 0, 0, 0, 0, ZoneId.of("Eire")), "Irish Standard Time"),
-            Arguments.of(ZonedDateTime.of(2026, 12, 5, 0, 0, 0, 0, ZoneId.of("Eire")), "Greenwich Mean Time"),
-            Arguments.of(ZonedDateTime.of(2026, 4, 5, 0, 0, 0, 0, ZoneId.of("America/Vancouver")), "Pacific Daylight Time"),
-            Arguments.of(ZonedDateTime.of(2026, 12, 5, 0, 0, 0, 0, ZoneId.of("America/Vancouver")), "Pacific Daylight Time")
+            // CLDR v48
+            Arguments.of(ZonedDateTime.of(2026, 4, 5, 0, 0, 0, 0, ZoneId.of("Europe/Dublin")), "Irish Standard Time", "IST"),
+            Arguments.of(ZonedDateTime.of(2026, 12, 5, 0, 0, 0, 0, ZoneId.of("Europe/Dublin")), "Greenwich Mean Time", "GMT"),
+            Arguments.of(ZonedDateTime.of(2026, 4, 5, 0, 0, 0, 0, ZoneId.of("Eire")), "Irish Standard Time", "IST"),
+            Arguments.of(ZonedDateTime.of(2026, 12, 5, 0, 0, 0, 0, ZoneId.of("Eire")), "Greenwich Mean Time", "GMT"),
+            // CLDR v48.2 & tz2026b. America/Vancouver switched to permanent DST
+            Arguments.of(ZonedDateTime.of(2026, 4, 5, 0, 0, 0, 0, ZoneId.of("America/Vancouver")), "Pacific Daylight Time", "PDT"),
+            Arguments.of(ZonedDateTime.of(2026, 12, 5, 0, 0, 0, 0, ZoneId.of("America/Vancouver")), "Pacific Daylight Time", "PDT")
         );
     }
 
@@ -340,18 +342,25 @@ public void test_getZoneStrings() {
             "getZoneStrings() returned array containing non-empty string element(s)");
     }
 
-    // Explicit metazone dst offset test. As of CLDR v48, only Europe/Dublin utilizes
-    // this attribute, but will be used for America/Vancouver once CLDR adopts the
-    // explicit offset for that zone, which warrants the test data modification.
+    // Explicit metazone DST offset test. This attribute is used for Europe/Dublin
+    // to support the negative DST. Also, it is used to support permanent DST names,
+    // such as with America/Vancouver. For the latter case, both CLDR data and corresponding
+    // updated TZDB data are required (e.g., tz2026b for America/Vancouver).
     @ParameterizedTest
     @MethodSource("explicitDstOffsets")
-    public void test_ExplicitMetazoneOffsets(ZonedDateTime zdt, String expected) {
+    public void test_ExplicitMetazoneOffsets(ZonedDateTime zdt, String expectedLong, String expectedShort) {
         // java.time
-        assertEquals(expected, DateTimeFormatter.ofPattern("zzzz").format(zdt));
+        assertEquals(expectedLong, DateTimeFormatter.ofPattern("zzzz").format(zdt));
+        assertEquals(expectedShort, DateTimeFormatter.ofPattern("z").format(zdt));
 
         // java.text/util
+        var date = Date.from(zdt.toInstant());
+        var tz = TimeZone.getTimeZone(zdt.getZone());
         var sdf = new SimpleDateFormat("zzzz");
-        sdf.setTimeZone(TimeZone.getTimeZone(zdt.getZone()));
-        assertEquals(expected, sdf.format(Date.from(zdt.toInstant())));
+        sdf.setTimeZone(tz);
+        assertEquals(expectedLong, sdf.format(date));
+        sdf = new SimpleDateFormat("z");
+        sdf.setTimeZone(tz);
+        assertEquals(expectedShort, sdf.format(date));
     }
 }