diff --git a/test/lib/jdk/test/lib/process/ProcessTools.java b/test/lib/jdk/test/lib/process/ProcessTools.java
index b6669e75364..30013773696 100644
--- a/test/lib/jdk/test/lib/process/ProcessTools.java
+++ b/test/lib/jdk/test/lib/process/ProcessTools.java
@@ -895,10 +895,10 @@ public final class ProcessTools {
                         tg.uncaughtThrowable = error;
                     }
                 });
-            if (tg.uncaughtThrowable != null) {
-                throw new RuntimeException(tg.uncaughtThrowable);
-            }
             vthread.join();
+            if (tg.uncaughtThrowable != null) {
+                throw tg.uncaughtThrowable;
+            }
         } else if (wrapper.equals("Kernel")) {
             MainThreadGroup tg = new MainThreadGroup();
             Thread t = new Thread(tg, () -> {
@@ -913,7 +913,7 @@ public final class ProcessTools {
             t.start();
             t.join();
             if (tg.uncaughtThrowable != null) {
-                throw new RuntimeException(tg.uncaughtThrowable);
+                throw tg.uncaughtThrowable;
             }
         } else {
             mainMethod.invoke(null, new Object[] { classArgs });