diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index 12ec3edda..d6d0c6ec2 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: macos-14
     strategy:
       matrix:
-        java: [17, 21]
+        java: [17, 23]
         scala: [2.13.15, 3.5.1]
     steps:
       - uses: actions/checkout@v3
diff --git a/atlas-chart/src/test/resources/graphengine/DefaultGraphEngineSuite/dark_default_single_line_timezones_many.png b/atlas-chart/src/test/resources/graphengine/DefaultGraphEngineSuite/dark_default_single_line_timezones_many.png
index eec38c266..99e5604ae 100644
Binary files a/atlas-chart/src/test/resources/graphengine/DefaultGraphEngineSuite/dark_default_single_line_timezones_many.png and b/atlas-chart/src/test/resources/graphengine/DefaultGraphEngineSuite/dark_default_single_line_timezones_many.png differ
diff --git a/atlas-chart/src/test/resources/graphengine/DefaultGraphEngineSuite/default_single_line_timezones_many.png b/atlas-chart/src/test/resources/graphengine/DefaultGraphEngineSuite/default_single_line_timezones_many.png
index 574c2dce7..88975f575 100644
Binary files a/atlas-chart/src/test/resources/graphengine/DefaultGraphEngineSuite/default_single_line_timezones_many.png and b/atlas-chart/src/test/resources/graphengine/DefaultGraphEngineSuite/default_single_line_timezones_many.png differ
diff --git a/atlas-chart/src/test/scala/com/netflix/atlas/chart/PngGraphEngineSuite.scala b/atlas-chart/src/test/scala/com/netflix/atlas/chart/PngGraphEngineSuite.scala
index 8ee735de9..9c33f94a8 100644
--- a/atlas-chart/src/test/scala/com/netflix/atlas/chart/PngGraphEngineSuite.scala
+++ b/atlas-chart/src/test/scala/com/netflix/atlas/chart/PngGraphEngineSuite.scala
@@ -310,8 +310,7 @@ abstract class PngGraphEngineSuite extends FunSuite {
   private val zones = List(
     ZoneId.of("US/Pacific"),
     ZoneId.of("UTC"),
-    ZoneId.of("Europe/Berlin"),
-    ZoneId.of("Australia/Eucla")
+    ZoneId.of("Europe/Berlin")
   )
   singleLine("single_line_timezone", v => v.copy(timezones = zones.take(1)))
   singleLine("single_line_timezones_ab", v => v.copy(timezones = zones.take(2)))