Index: /trunk/test/functional/org/openstreetmap/josm/gui/mappaint/MapCSSRendererTest.java
===================================================================
--- /trunk/test/functional/org/openstreetmap/josm/gui/mappaint/MapCSSRendererTest.java	(revision 16093)
+++ /trunk/test/functional/org/openstreetmap/josm/gui/mappaint/MapCSSRendererTest.java	(revision 16094)
@@ -19,4 +19,5 @@
 import java.util.Collections;
 import java.util.List;
+import java.util.Locale;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
@@ -159,5 +160,5 @@
     public void forOpenJDK() {
         String javaHome = System.getProperty("java.home");
-        Assume.assumeTrue("Test requires openJDK", javaHome != null && javaHome.contains("openjdk"));
+        Assume.assumeTrue("Test requires openJDK", javaHome != null && javaHome.toLowerCase(Locale.ENGLISH).contains("openjdk"));
 
         List<String> fonts = Arrays.asList(GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames());