diff -r 2c3cc4b01880 -r c16ac7a2eba4 test/jdk/jdk/jfr/api/consumer/recordingstream/TestSetStartTime.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/jdk/jfr/api/consumer/recordingstream/TestSetStartTime.java	Wed Oct 30 19:43:52 2019 +0100
@@ -0,0 +1,138 @@
+/*
+ * 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.consumer.recordingstream;
+
+import java.io.IOException;
+import java.time.Duration;
+import java.time.Instant;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import jdk.jfr.Event;
+import jdk.jfr.Name;
+import jdk.jfr.Recording;
+import jdk.jfr.StackTrace;
+import jdk.jfr.consumer.EventStream;
+import jdk.jfr.consumer.RecordingStream;
+
+/**
+ * @test
+ * @summary Tests EventStream::setStartTime
+ * @key jfr
+ * @requires vm.hasJFR
+ * @library /test/lib
+ * @run main/othervm jdk.jfr.api.consumer.recordingstream.TestSetStartTime
+ */
+public final class TestSetStartTime {
+
+    private final static int SLEEP_TIME_MS = 100;
+
+    @Name("Mark")
+    @StackTrace(false)
+    public final static class Mark extends Event {
+        public boolean before;
+    }
+
+    public static void main(String... args) throws Exception {
+        testEventStream();
+        testRecordingStream();
+    }
+
+    private static void testRecordingStream() throws InterruptedException {
+        AtomicBoolean exit = new AtomicBoolean();
+        int attempt = 1;
+        while (!exit.get()) {
+            System.out.println("Testing RecordingStream:setStartTime(...). Attempt: " + attempt++);
+            AtomicBoolean firstEvent = new AtomicBoolean(true);
+            try (RecordingStream r2 = new RecordingStream()) {
+                Instant t = Instant.now().plus(Duration.ofMillis(SLEEP_TIME_MS / 2));
+                System.out.println("Setting start time: " + t);
+                r2.setStartTime(t);
+                r2.onEvent(e -> {
+                    if (firstEvent.get()) {
+                        firstEvent.set(false);
+                        if (!e.getBoolean("before")) {
+                            // Skipped first event, let's exit
+                            exit.set(true);
+                        }
+                        r2.close();
+                    }
+                });
+                r2.startAsync();
+                Mark m1 = new Mark();
+                m1.before = true;
+                m1.commit();
+                System.out.println("First event emitted: " + Instant.now());
+                Thread.sleep(SLEEP_TIME_MS);
+                Mark m2 = new Mark();
+                m2.before = false;
+                m2.commit();
+                System.out.println("Second event emitted: " + Instant.now());
+                r2.awaitTermination();
+            }
+            System.out.println();
+        }
+    }
+
+    private static void testEventStream() throws InterruptedException, Exception, IOException {
+        AtomicBoolean exit = new AtomicBoolean();
+        int attempt = 1;
+        while (!exit.get()) {
+            System.out.println("Testing EventStream:setStartTime(...). Attempt: " + attempt++);
+            AtomicBoolean firstEvent = new AtomicBoolean(true);
+            try (Recording r = new Recording()) {
+                r.start();
+                Mark event1 = new Mark();
+                event1.before = true;
+                event1.commit();
+                Instant t = Instant.now();
+                System.out.println("First event emitted: " + t);
+                Thread.sleep(SLEEP_TIME_MS);
+                Mark event2 = new Mark();
+                event2.before = false;
+                event2.commit();
+                System.out.println("Second event emitted: " + Instant.now());
+                try (EventStream es = EventStream.openRepository()) {
+                    Instant startTime = t.plus(Duration.ofMillis(SLEEP_TIME_MS / 2));
+                    es.setStartTime(startTime);
+                    System.out.println("Setting start time: " + startTime);
+                    es.onEvent(e -> {
+                        if (firstEvent.get()) {
+                            firstEvent.set(false);
+                            if (!e.getBoolean("before")) {
+                                // Skipped first event, let's exit
+                                exit.set(true);
+                            }
+                            es.close();
+                        }
+                    });
+                    es.startAsync();
+                    es.awaitTermination();
+                }
+            }
+            System.out.println();
+        }
+    }
+}