diff -r 94b42093a2b2 -r d312a15c5fcf langtools/test/tools/doclint/DuplicateParamTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/doclint/DuplicateParamTest.java	Fri Jan 27 15:49:14 2017 -0800
@@ -0,0 +1,24 @@
+/*
+ * @test /nodynamiccopyright/
+ * @bug 8081820
+ * @summary Validate parameter names uniqueness
+ * @modules jdk.compiler/com.sun.tools.doclint
+ * @build DocLintTester
+ * @run main DocLintTester -Xmsgs:-reference DuplicateParamTest.java
+ * @run main DocLintTester -ref DuplicateParamTest.out DuplicateParamTest.java
+ */
+
+/** . */
+public class DuplicateParamTest {
+
+    /**
+     * Test.
+     *
+     * @param s one
+     * @param s two
+     * @param s three
+     *
+     * @return number
+     */
+    public static int Test(String s) { return s.length(); }
+}