diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/serials/subscription-add.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/serials/subscription-add.tt
index e15aec3412..0efbb37487 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/serials/subscription-add.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/serials/subscription-add.tt
@@ -467,7 +467,7 @@ fieldset.rows table { clear: none; margin: 0; }
                                     </ol>
                                 </div> <!-- /#advancedpredictionpattern -->
                                 <fieldset class="action">
-                                    <button type="button" id="testpatternbutton" class="btn btn-default btn-sm"><i class="fa fa-play"></i> Test prediction pattern</a>
+                                    <button type="button" id="testpatternbutton" class="btn btn-default btn-sm"><i class="fa fa-play"></i> Test prediction pattern</button>
                                 </fieldset>
                             </fieldset>