--- old/test/jdk/java/util/Optional/Basic.java	2018-04-17 06:15:11.567693939 -0700
+++ new/test/jdk/java/util/Optional/Basic.java	2018-04-17 06:15:11.258665483 -0700
@@ -33,6 +33,7 @@
 import java.util.NoSuchElementException;
 import java.util.Optional;
 import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.function.Predicate;
 
 import static java.util.stream.Collectors.toList;
 
@@ -52,6 +53,7 @@
         assertFalse(empty.equals("unexpected"));
 
         assertFalse(empty.isPresent());
+        assertTrue(empty.isEmpty());
         assertEquals(empty.hashCode(), 0);
         assertEquals(empty.orElse("x"), "x");
         assertEquals(empty.orElseGet(() -> "y"), "y");
@@ -87,6 +89,7 @@
         assertFalse(opt.equals("unexpected"));
 
         assertTrue(opt.isPresent());
+        assertFalse(opt.isEmpty());
         assertEquals(opt.hashCode(), expected.hashCode());
         assertEquals(opt.orElse("unexpected"), expected);
         assertEquals(opt.orElseGet(() -> "unexpected"), expected);