--- /dev/null	2020-03-03 22:06:13.039758260 +0000
+++ new/test/jaxp/javax/xml/jaxp/unittest/transform/ResultTest.java	2020-03-30 17:29:49.671375641 +0000
@@ -0,0 +1,109 @@
+/*
+ * 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.
+ */
+
+package transform;
+
+import java.io.ByteArrayOutputStream;
+import java.io.OutputStream;
+import java.io.Reader;
+import java.io.StringReader;
+import javax.xml.parsers.SAXParser;
+import javax.xml.parsers.SAXParserFactory;
+import javax.xml.stream.XMLEventWriter;
+import javax.xml.stream.XMLOutputFactory;
+import javax.xml.stream.XMLStreamWriter;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.stax.StAXResult;
+import javax.xml.transform.stream.StreamSource;
+import org.testng.annotations.BeforeClass;
+import org.testng.annotations.Test;
+import org.xml.sax.InputSource;
+import org.xml.sax.helpers.DefaultHandler;
+
+/*
+ * @test
+ * @bug 8238183
+ * @library /javax/xml/jaxp/libs /javax/xml/jaxp/unittest
+ * @run testng/othervm transform.ResultTest
+ * @summary Verifies that the output of a transformation is well-formed when
+ *          StAXResult is used.
+ */
+public class ResultTest {
+    // The XML contains a comment before the root element
+    final static String XML =
+            "<?xml version=\"1.0\" ?>\n"
+            + "<!--comment-->\n"
+            + "<root />\n";
+    static Transformer T;
+
+    @BeforeClass
+    public void setup() {
+        try {
+            T = TransformerFactory.newInstance().newTransformer();
+        } catch (Exception e) {
+            throw new RuntimeException(e.getMessage());
+        }
+    }
+
+    /**
+     * Transforms the XML using a StAXResult with a StreamWriter.
+     * @throws Exception if the process fails
+     */
+    @Test
+    public void testStreamWriter() throws Exception {
+        try (Reader reader = new StringReader(XML);
+                OutputStream out = new ByteArrayOutputStream()) {
+            XMLOutputFactory factory = XMLOutputFactory.newFactory();
+            XMLStreamWriter writer = factory.createXMLStreamWriter(out);
+            StreamSource source = new StreamSource(reader);
+            StAXResult result = new StAXResult(writer);
+            T.transform(source, result);
+            // verify the output is well-formed
+            parseXML(out.toString());
+        }
+    }
+
+    /**
+     * Transforms the XML using a StAXResult with a EventWriter.
+     * @throws Exception if the process fails
+     */
+    @Test
+    public void testEventWriter() throws Exception {
+        try (Reader reader = new StringReader(XML);
+                OutputStream out = new ByteArrayOutputStream()) {
+            XMLOutputFactory ofactory = XMLOutputFactory.newInstance();
+            XMLEventWriter writer = ofactory.createXMLEventWriter(out);
+            StAXResult result = new StAXResult(writer);
+            StreamSource source = new StreamSource(reader);
+            T.transform(source, result);
+            parseXML(out.toString());
+        }
+    }
+
+    // parses the xml to verify that it's well-formed
+    private void parseXML(String xml) throws Exception {
+        SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
+        parser.parse(new InputSource(new StringReader(xml)), new DefaultHandler());
+    }
+}