diff --git a/test/javax/xml/jaxp/XPath/8015978/XPathNegativeZero.java b/test/javax/xml/jaxp/XPath/8015978/XPathNegativeZero.java
new file mode 100644
index 0000000000000000000000000000000000000000..79a3ed515353f3890ed814786c4a6f71beab9524
--- /dev/null
+++ b/test/javax/xml/jaxp/XPath/8015978/XPathNegativeZero.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2013, 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
+ * @bug 8015978
+ * @summary Incorrect transformation of XPath expression "string(-0)"
+ * @run main XPathNegativeZero
+ * @author aleksej.efimov@oracle.com
+ */
+
+import java.io.File;
+import java.io.StringWriter;
+import javax.xml.transform.TransformerFactory;
+import javax.xml.transform.Templates;
+import javax.xml.transform.Transformer;
+import javax.xml.transform.Source;
+import javax.xml.transform.Result;
+import javax.xml.transform.stream.StreamSource;
+import javax.xml.transform.stream.StreamResult;
+
+
+public class XPathNegativeZero {
+
+    static final String EXPECTEDXML = "<newtop>\"0\"</newtop>";
+
+    public static void main(final String[] args) throws Exception {
+        //file name of XML file to transform
+        final String xml = System.getProperty("test.src", ".")+"/dummy.xml";
+        //file name of XSL file w/ transformation
+        final String xsl = System.getProperty("test.src", ".")+"/negativezero.xsl";
+        final String result = xform(xml, xsl).trim();
+
+        System.out.println("transformed XML: '"+result+ "' expected XML: '"+EXPECTEDXML+"'");
+        if (!result.equals(EXPECTEDXML))
+            throw new Exception("Negative zero was incorrectly transformed");
+    }
+
+    private static String xform(final String xml, final String xsl) throws Exception {
+        final TransformerFactory tf = TransformerFactory.newInstance();
+        final Source xslsrc = new StreamSource(new File(xsl));
+        final Templates tmpl = tf.newTemplates(xslsrc);
+        final Transformer t = tmpl.newTransformer();
+
+        StringWriter writer = new StringWriter();
+        final Source src = new StreamSource(new File(xml));
+        final Result res = new StreamResult(writer);
+
+        t.transform(src, res);
+        return writer.toString();
+    }
+}
diff --git a/test/javax/xml/jaxp/XPath/8015978/dummy.xml b/test/javax/xml/jaxp/XPath/8015978/dummy.xml
new file mode 100644
index 0000000000000000000000000000000000000000..3ad73ac3b6f21e5c7b96f707d3d6b9ed9ea9dd2a
--- /dev/null
+++ b/test/javax/xml/jaxp/XPath/8015978/dummy.xml
@@ -0,0 +1 @@
+<top/>
diff --git a/test/javax/xml/jaxp/XPath/8015978/negativezero.xsl b/test/javax/xml/jaxp/XPath/8015978/negativezero.xsl
new file mode 100644
index 0000000000000000000000000000000000000000..5ee2dbe6dd560c8aa9f9586f0b54717def084c19
--- /dev/null
+++ b/test/javax/xml/jaxp/XPath/8015978/negativezero.xsl
@@ -0,0 +1,4 @@
+<xsl:stylesheet version='1.0' xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>
+   <xsl:output method='xml' indent='yes' omit-xml-declaration='yes'/>
+   <xsl:template match='/'><newtop>"<xsl:value-of select='string(-0.0)'/>"</newtop></xsl:template>
+</xsl:stylesheet>