diff --git a/Tests/test_file_dds.py b/Tests/test_file_dds.py
index 5e2e841fd..37869288f 100644
--- a/Tests/test_file_dds.py
+++ b/Tests/test_file_dds.py
@@ -172,7 +172,7 @@ def test_short_header():
 
     def short_header():
         with Image.open(BytesIO(img_file[:119])):
-            pass
+            pass  # pragma: no cover
 
     with pytest.raises(OSError):
         short_header()