diff --git a/test/xdocs/properties.xml b/test/xdocs/properties.xml
index 642179ff..18be9ad3 100644
--- a/test/xdocs/properties.xml
+++ b/test/xdocs/properties.xml
@@ -139,6 +139,14 @@
             </p>
           </td>
         </tr>
+        <tr>
+          <td>maven.test.reportsDirectory</td>
+          <td>Yes</td>
+          <td>
+            Directory to write the reports to.
+            Defaults to <code>${maven.build.dir}/test-reports</code>.
+          </td>
+        </tr>
         <tr>
           <td>maven.junit.jvmargs</td>
           <td>Yes</td>