diff --git a/module/VuFind/tests/unit-tests/src/VuFindTest/QRCode/LoaderTest.php b/module/VuFind/tests/unit-tests/src/VuFindTest/QRCode/LoaderTest.php
index fa67a1b2b0ff13c5209697748e38ba6d506c92cb..bc22fbf35d976b8ff3f839fcb24c98874efaf549 100644
--- a/module/VuFind/tests/unit-tests/src/VuFindTest/QRCode/LoaderTest.php
+++ b/module/VuFind/tests/unit-tests/src/VuFindTest/QRCode/LoaderTest.php
@@ -71,6 +71,7 @@ class LoaderTest extends \VuFindTest\Unit\TestCase
     public function testDefaultLoadingForBlankText()
     {
         $loader = $this->getLoader();
+        $loader->loadQRCode('');
         $this->assertEquals('image/gif', $loader->getContentType());
         $this->assertEquals('483', strlen($loader->getImage()));
     }