$ cat TestCompact2.java TestXML.java
/*
 * @test
 * @modules java.compact2
 */
public class TestCompact2 {
    public static void main(String[] argv) {}
}
/*
 * @test
 * @modules java.xml
 */
public class TestXML {
    public static void main(String[] argv) {}
}
$ jtreg TestCompact2.java TestXML.java
Passed: TestCompact2.java
Passed: TestXML.java
Test results: passed: 2
$ jtreg -javaoptions:"-limitmods java.xml" TestCompact2.java TestXML.java
Passed: TestXML.java
Test results: passed: 1
$ jtreg -javaoptions:"-limitmods java.compact2" TestCompact2.java TestXML.java
Passed: TestXML.java
Test results: passed: 1
$ jtreg -javaoptions:"-limitmods java.compact2" TestCompact2.java
Test results: no tests selected