diff --git a/tests/BaseElementTest.php b/tests/BaseElementTest.php
index dbc91706..4688b476 100644
--- a/tests/BaseElementTest.php
+++ b/tests/BaseElementTest.php
@@ -481,7 +481,7 @@ public function testPreviewLink(string $class, string $elementIdentifier, ?strin
     {
         /** @var BaseElement $element */
         $element = $this->objFromFixture($class, $elementIdentifier);
-        $previewLink = $element->PreviewLink();
+        $previewLink = $element->PreviewLink() ?? '';
         // Remove SubsiteID from preview link in case subsites is installed
         $rx = '/[?|&]SubsiteID=[0-9]+/';
         if (preg_match($rx, $previewLink)) {