--- /dev/null	2015-10-01 08:26:49.162920927 +0300
+++ new/test/java/awt/Window/MultiWindowApp/ChildAlwaysOnTopTest.java	2015-10-01 13:14:13.000000000 +0300
@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) 2015, 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.
+ *
+ * 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.
+ */
+
+/**
+ * @test @summary setAlwaysOnTop doesn't behave correctly in Linux/Solaris under
+ *                certain scenarios
+ * @bug 8021961
+ * @author Semyon Sadetsky
+ * @run main ChildAlwaysOnTopTest
+ */
+
+import javax.swing.*;
+import java.awt.*;
+
+public class ChildAlwaysOnTopTest {
+
+    private static Window win1;
+    private static Window win2;
+    private static Point point;
+
+    public static void main(String[] args) throws Exception {
+        if( Toolkit.getDefaultToolkit().isAlwaysOnTopSupported() ) {
+
+            //test with invisible parent
+            test(null);
+
+            Frame f = new Frame();
+            f.setBackground(Color.darkGray);
+            f.setSize(500, 500);
+            f.setVisible(true);
+            try {
+                // test with visible parent
+                test(f);
+            } finally {
+                f.dispose();
+            }
+        }
+        System.out.println("ok");
+    }
+
+    public static void test(Frame f) throws Exception {
+        SwingUtilities.invokeAndWait(new Runnable() {
+            @Override
+            public void run() {
+                win1 = f == null ? new JDialog() : new JDialog(f);
+                win1.setName("top");
+                win2 = f == null ? new JDialog() : new JDialog(f);
+                win2.setName("behind");
+                win1.setSize(200, 200);
+                Panel panel = new Panel();
+                panel.setBackground(Color.GREEN);
+                win1.add(panel);
+                panel = new Panel();
+                panel.setBackground(Color.RED);
+                win2.add(panel);
+                win1.setAlwaysOnTop(true);
+                win2.setAlwaysOnTop(false);
+                win1.setVisible(true);
+            }
+        });
+
+        Robot robot = new Robot();
+        robot.delay(200);
+        robot.waitForIdle();
+
+        SwingUtilities.invokeAndWait(new Runnable() {
+            @Override
+            public void run() {
+                point = win1.getLocationOnScreen();
+                win2.setBounds(win1.getBounds());
+                if (f != null) {
+                    f.setLocation(win1.getLocation());
+                }
+                win2.setVisible(true);
+            }
+        });
+
+        robot.delay(200);
+        robot.waitForIdle();
+
+        Color color = robot.getPixelColor(point.x + 100, point.y + 100);
+        if(!color.equals(Color.GREEN)) {
+            win1.dispose();
+            win2.dispose();
+            throw new RuntimeException("alawaysOnTop window is sent back by " +
+                    "another child window setVisible().");
+        }
+
+        SwingUtilities.invokeAndWait(new Runnable() {
+            @Override
+            public void run() {
+                if (f != null) {
+                    f.toFront();
+                }
+                win2.toFront();
+            }
+        });
+
+        robot.delay(200);
+        robot.waitForIdle();
+
+        color = robot.getPixelColor(point.x + 100, point.y + 100);
+        if(!color.equals(Color.GREEN)) {
+            win1.dispose();
+            win2.dispose();
+            throw new RuntimeException("alawaysOnTop window is sent back by " +
+                    "another child window toFront().");
+        }
+
+        SwingUtilities.invokeAndWait(new Runnable() {
+            @Override
+            public void run() {
+                win1.setAlwaysOnTop(false);
+                win2.toFront();
+                if (f != null) {
+                    f.toFront();
+                }
+            }
+        });
+
+        robot.delay(200);
+        robot.waitForIdle();
+
+        color = robot.getPixelColor(point.x + 100, point.y + 100);
+        if(!color.equals(Color.RED)) {
+            throw new RuntimeException("Failed to unset alawaysOnTop");
+        }
+
+        win1.dispose();
+        win2.dispose();
+    }
+}