--- /dev/null	2018-10-01 13:41:55.688000000 +0530
+++ new/tests/system/src/test/java/test/javafx/stage/DeiconifiedWithChildTest.java	2018-10-03 15:26:13.762359096 +0530
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 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 test.javafx.stage;
+
+import javafx.application.Application;
+import javafx.application.Platform;
+import javafx.scene.Scene;
+import javafx.scene.layout.VBox;
+import javafx.stage.Stage;
+import javafx.stage.WindowEvent;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+import static org.junit.Assert.fail;
+
+public class DeiconifiedWithChildTest {
+    static CountDownLatch startupLatch;
+    static Stage stage;
+    static Stage childStage;
+
+    public static void main(String[] args) throws Exception {
+        initFX();
+        try {
+            new DeiconifiedWithChildTest().testDeiconifiedPosition();
+        } finally {
+            teardown();
+        }
+    }
+
+    public static class TestApp extends Application {
+
+        @Override
+        public void start(Stage primaryStage) throws Exception {
+            primaryStage.setScene(new Scene(new VBox(), 200, 200));
+            stage = primaryStage;
+            stage.show();
+
+            childStage = new Stage();
+            childStage.initOwner(stage);
+            childStage.setScene(new Scene(new VBox(), 100, 100));
+            childStage.addEventHandler(WindowEvent.WINDOW_SHOWN, e ->
+                    Platform.runLater(startupLatch::countDown));
+            childStage.show();
+        }
+    }
+
+    @BeforeClass
+    public static void initFX() {
+        startupLatch = new CountDownLatch(1);
+        new Thread(() -> Application.launch(TestApp.class, (String[])null)).start();
+        try {
+            if (!startupLatch.await(15, TimeUnit.SECONDS)) {
+                fail("Timeout waiting for FX runtime to start");
+            }
+        } catch (InterruptedException ex) {
+            fail("Unexpected exception: " + ex);
+        }
+    }
+
+    @Test
+    public void testDeiconifiedPosition() throws Exception {
+        Thread.sleep(200);
+        Assert.assertTrue(stage.isShowing());
+        Assert.assertTrue(childStage.isShowing());
+        Assert.assertFalse(stage.isIconified());
+
+        double x = childStage.getX();
+        double y = childStage.getY();
+
+        Platform.runLater(() -> stage.setIconified(true));
+        Thread.sleep(200);
+        Platform.runLater(() -> stage.setIconified(false));
+        Thread.sleep(200);
+        Assert.assertEquals("Child window was moved", x, childStage.getX(), 0.1);
+        Assert.assertEquals("Child window was moved", y, childStage.getY(), 0.1);
+    }
+
+    @AfterClass
+    public static void teardown() {
+        Platform.runLater(childStage::hide);
+        Platform.runLater(stage::hide);
+        Platform.exit();
+    }
+}
+