diff --git a/Tests/test_file_png.py b/Tests/test_file_png.py
index 0884ddcc35d..74b17da4732 100644
--- a/Tests/test_file_png.py
+++ b/Tests/test_file_png.py
@@ -786,6 +786,7 @@ def test_truncated_end_chunk(self):
         ImageFile.LOAD_TRUNCATED_IMAGES = True
         try:
             with Image.open("Tests/images/truncated_end_chunk.png") as im:
+                im.load()
                 assert_image_equal_tofile(im, "Tests/images/hopper.png")
         finally:
             ImageFile.LOAD_TRUNCATED_IMAGES = False