diff -r 2c3cc4b01880 -r c16ac7a2eba4 test/jdk/jdk/jfr/api/recording/time/TestSetFlushInterval.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/jdk/jfr/api/recording/time/TestSetFlushInterval.java	Wed Oct 30 19:43:52 2019 +0100
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.jfr.api.recording.time;
+
+import java.time.Duration;
+import java.util.concurrent.CountDownLatch;
+
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.EventStream;
+import jdk.test.lib.Asserts;
+
+/**
+ * @test
+ * @key jfr
+ * @summary Test Recording::SetFlushInterval(...) and
+ *          Recording::getFlushInterval()
+ * @requires vm.hasJFR
+ * @library /test/lib
+ * @run main/othervm jdk.jfr.api.recording.time.TestSetFlushInterval
+ */
+
+public class TestSetFlushInterval {
+
+    public static void main(String[] args) throws Throwable {
+        testSetGet();
+        testSetNull();
+        testFlush();
+    }
+
+    static void testFlush() throws Exception {
+        CountDownLatch flush = new CountDownLatch(1);
+        try (EventStream es = EventStream.openRepository()) {
+            es.onFlush(() -> {
+                flush.countDown();
+            });
+            es.startAsync();
+            try (Recording r = new Recording()) {
+                r.setFlushInterval(Duration.ofSeconds(1));
+                r.start();
+                flush.await();
+            }
+        }
+    }
+
+    static void testSetNull() {
+        try (Recording r = new Recording()) {
+            r.setFlushInterval(null);
+            Asserts.fail("Expected NullPointerException");
+        } catch (NullPointerException npe) {
+            // as expected
+        }
+    }
+
+    static void testSetGet() {
+        try (Recording r = new Recording()) {
+            Duration a = Duration.ofNanos(21378461289374646L);
+            r.setFlushInterval(a);
+            Duration b = r.getFlushInterval();
+            Asserts.assertEQ(a, b);
+        }
+    }
+
+}