diff --git a/core/tests/Drupal/Tests/Core/Image/ImageTest.php b/core/tests/Drupal/Tests/Core/Image/ImageTest.php
index 3a03929..367f7d9 100644
--- a/core/tests/Drupal/Tests/Core/Image/ImageTest.php
+++ b/core/tests/Drupal/Tests/Core/Image/ImageTest.php
@@ -229,6 +229,7 @@ public function testGetMimeType() {
    * Tests \Drupal\Core\Image\Image::isExisting().
    */
   public function testIsExisting() {
+    $this->getTestImage();
     $this->assertTrue($this->image->isExisting());
     $this->assertTrue(is_readable($this->image->getSource()));
   }