Previously https://bugs.openjdk.org/browse/JDK-8340326 reported that
 jdk/internal/loader/URLClassPath/ClassnameCharTest.java (amongst other tests) depended on Applet.
The visible mentions of Applet were removed but it uses testclasses.jar which contains two instances of Applet

% jar tf testclasses.jar
META-INF/
META-INF/MANIFEST.MF
手册.class
fo o.class

% javap fo\ o.class
Compiled from "fooo.java"
public class fo o extends java.applet.Applet {
  public fo o();
  public void start();
}
 % (master) javap æ$'\302\211'$'\302\213'å$'\302\206'$'\302\214'.class
Compiled from "手册.java"
public class 手册 extends java.applet.Applet {
  public 手册();
  public void start();
}

This test will therefore fail when the Applet API is removed.
If that happens before this test is updated, the test will need to be problem-listed.

I'm also a bit surprised that the test has so many uses of java.security APIs.
They can't be doing anything any more.