diff --git a/core/modules/simpletest/src/WebTestBase.php b/core/modules/simpletest/src/WebTestBase.php
index e17d703..ca20171 100644
--- a/core/modules/simpletest/src/WebTestBase.php
+++ b/core/modules/simpletest/src/WebTestBase.php
@@ -2342,7 +2342,7 @@ protected function handleForm(&$post, &$edit, &$upload, $submit, $form) {
    */
   protected function clickLink($label, $index = 0) {
     $url_before = $this->getUrl();
-    $urls = $this->xpath('//a[normalize-space()=:label]', array(':label' => $label));
+    $urls = $this->xpath('//a[starts-with(normalize-space(), :label)]', array(':label' => $label));
     if (isset($urls[$index])) {
       $url_target = $this->getAbsoluteUrl($urls[$index]['href']);
       $this->pass(SafeMarkup::format('Clicked link %label (@url_target) from @url_before', array('%label' => $label, '@url_target' => $url_target, '@url_before' => $url_before)), 'Browser');