diff --git a/core/tests/Drupal/Tests/Listeners/SimpletestUiPrinter.php b/core/tests/Drupal/Tests/Listeners/SimpletestUiPrinter.php
index 2680606..bfb91d7 100644
--- a/core/tests/Drupal/Tests/Listeners/SimpletestUiPrinter.php
+++ b/core/tests/Drupal/Tests/Listeners/SimpletestUiPrinter.php
@@ -15,8 +15,8 @@ class SimpletestUiPrinter extends HtmlOutputPrinter {
   public function write($buffer) {
     $buffer = Html::escape($buffer);
     // Turn HTML output URLs into clickable link <a> tags.
-    $url_pattern = '@(http)(s)?(://)?([^\s]+)@';
-    $buffer = preg_replace($url_pattern, '<a href="http$2://$4" target="_blank" title="$0">$0</a>', $buffer);
+    $url_pattern = '@https?://[^\s]+@';
+    $buffer = preg_replace($url_pattern, '<a href="$0" target="_blank" title="$0">$0</a>', $buffer);
     // Make the output readable in HTML by breaking up lines properly.
     $buffer = nl2br($buffer);