--- /dev/null	2017-11-09 09:38:01.297999907 +0100
+++ new/test/jdk/jdk/jfr/cmd/TestHelp.java	2018-04-09 17:26:00.730646134 +0200
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2016, 2018, 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.cmd;
+
+import jdk.test.lib.process.OutputAnalyzer;
+
+/*
+ * @test
+ * @summary Test help
+ * @key jfr
+ * @library /test/lib /test/jdk
+ * @run main/othervm jdk.jfr.cmd.TestHelp
+ */
+public class TestHelp {
+
+    public static void main(String[] args) throws Exception {
+        OutputAnalyzer output = ExecuteHelper.run("help");
+        output.shouldContain("Available commands are:");
+        output.shouldContain("print");
+        output.shouldContain("reconstruct");
+        output.shouldContain("summary");
+        output.shouldContain("help");
+
+        output = ExecuteHelper.run("help", "help");
+        output.shouldContain("Available commands are:");
+
+        output = ExecuteHelper.run("help", "wrongcommand");
+        output.shouldContain("Unknown command");
+
+        output = ExecuteHelper.run("help", "wrongcommand", "wrongarguments");
+        output.shouldContain("Too many arguments");
+    }
+}