Index: /trunk/build.xml
===================================================================
--- /trunk/build.xml	(revision 18347)
+++ /trunk/build.xml	(revision 18348)
@@ -487,5 +487,5 @@
 	                    <sysproperty key="josm.test.data" value="${test.dir}/data"/>
 	                    <sysproperty key="java.awt.headless" value="${test.headless}"/>
-	                    <sysproperty key="java.security.manager" value="allow"/>
+	                    <sysproperty key="java.security.manager" value="allow" if:set="isJava17" />
 	                    <sysproperty key="glass.platform" value="Monocle"/>
 	                    <sysproperty key="monocle.platform" value="Headless"/>