test/testlibrary/com/oracle/java/testlibrary/ProcessTools.java

@@ -135,10 +135,12 @@
   public static ProcessBuilder createJavaProcessBuilder(boolean addTestVmAndJavaOptions, String... command) throws Exception {
     String javapath = JDKToolFinder.getJDKTool("java");
 
     ArrayList<String> args = new ArrayList<>();
     args.add(javapath);
+    args.add("-classpath");
+    args.add(System.getProperty("java.class.path"));
     Collections.addAll(args, getPlatformSpecificVMArgs());
 
     if (addTestVmAndJavaOptions) {
       Collections.addAll(args, Utils.getTestJavaOpts());
     }