--- a/test/jdk/java/net/MulticastSocket/UnreferencedMulticastSockets.java	Wed May 08 12:45:02 2019 -0700
+++ b/test/jdk/java/net/MulticastSocket/UnreferencedMulticastSockets.java	Tue Apr 16 13:06:23 2019 -0700
@@ -23,6 +23,7 @@
 
 /**
  * @test
+ * @library /test/lib
  * @modules java.management java.base/java.io:+open java.base/java.net:+open
  * @run main/othervm -Djava.net.preferIPv4Stack=true UnreferencedMulticastSockets
  * @run main/othervm UnreferencedMulticastSockets
@@ -50,6 +51,8 @@
 import java.util.Optional;
 import java.util.concurrent.TimeUnit;
 
+import jdk.test.lib.net.IPSupport;
+
 import com.sun.management.UnixOperatingSystemMXBean;
 
 public class UnreferencedMulticastSockets {
@@ -104,6 +107,7 @@
     }
 
     public static void main(String args[]) throws Exception {
+        IPSupport.skipIfCurrentConfigurationIsInvalid();
 
         // Create and close a MulticastSocket to warm up the FD count for side effects.
         try (MulticastSocket s = new MulticastSocket(0)) {