--- /dev/null	2020-02-12 13:42:31.000000000 -0800
+++ new/test/jdk/java/awt/Window/MinimumSizeDPIVariation/MinimumSizeDPIVariation.java	2020-02-12 13:42:30.000000000 -0800
@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2020, 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.
+ */
+
+import java.awt.Dialog;
+import java.awt.Dimension;
+import java.awt.Frame;
+import java.awt.Window;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+import jdk.test.lib.Platform;
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.process.ProcessTools;
+
+/**
+ * @test
+ * @bug 8221823
+ * @key headful
+ * @summary Verifies TOP level component's minimumSize using different DPI
+ * @library /test/lib
+ * @run main/othervm -Dsun.java2d.uiScale=1 MinimumSizeDPIVariation
+ */
+public final class MinimumSizeDPIVariation {
+
+    public static void main(String[] args) throws Exception {
+        if (args.length == 0) {
+            Dimension minimumSize = test(new Frame());
+            checkAllDPI("frame", minimumSize.width, minimumSize.height);
+            minimumSize = test(new Window(null));
+            checkAllDPI("window", minimumSize.width, minimumSize.height);
+            minimumSize = test(new Dialog((Frame) null));
+            checkAllDPI("dialog", minimumSize.width, minimumSize.height);
+        } else {
+            String comp = args[0];
+            int w = Integer.parseInt(args[1]);
+            int h = Integer.parseInt(args[2]);
+            double scale = Double.parseDouble(args[3]);
+
+            System.err.println("comp = " + comp);
+            System.err.println("scale = " + scale);
+
+            Dimension minimumSize = switch (comp) {
+                case "frame" -> test(new Frame());
+                case "window" -> test(new Window(null));
+                case "dialog" -> test(new Dialog((Frame) null));
+                default -> throw new java.lang.IllegalStateException(
+                        "Unexpected value: " + comp);
+            };
+            check(minimumSize.width, Math.max(w / scale, 1));
+            check(minimumSize.height, Math.max(h / scale, 1));
+        }
+    }
+
+    private static Dimension test(Window window) {
+        try {
+            window.setLayout(null); // trigger use the minimum size of the peer
+            window.setSize(new Dimension(1, 1));
+            window.pack();
+            Dimension minimumSize = window.getMinimumSize();
+            Dimension size = window.getSize();
+            if (!minimumSize.equals(size)) {
+                System.err.println(window);
+                System.err.println("Expected: " + minimumSize);
+                System.err.println("Actual: " + size);
+                throw new RuntimeException("Wrong size");
+            }
+            return minimumSize;
+        } finally {
+            window.dispose();
+        }
+    }
+
+    private static void check(int actual, double expected) {
+        double i = 100 * (actual - expected) / expected;
+        if (Math.abs(i) > 10) { // no more than 10% variation
+            System.err.println("Expected: " + expected);
+            System.err.println("Actual: " + actual);
+            throw new RuntimeException("Difference is too big: " + i);
+        }
+    }
+
+    private static void checkAllDPI(String comp, int w, int h)
+            throws Exception {
+        if (!Platform.isOSX()) {
+            for (String dpi : List.of("1.5", "1.75", "2", "2.5")) {
+                runPocess(dpi, comp, w, h);
+            }
+        }
+    }
+
+    private static void runPocess(String dpi, String comp, int w, int h)
+            throws Exception {
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+                "-Dsun.java2d.uiScale=" + dpi,
+                MinimumSizeDPIVariation.class.getSimpleName(), comp,
+                String.valueOf(w), String.valueOf(h), dpi);
+        Process worker = ProcessTools.startProcess("Worker", pb, null, 20,
+                TimeUnit.SECONDS);
+        new OutputAnalyzer(worker).shouldHaveExitValue(0);
+    }
+}