diff --git a/tests/test_head_auto_apply.py b/tests/test_head_auto_apply.py
index e56b98b..4e835aa 100644
--- a/tests/test_head_auto_apply.py
+++ b/tests/test_head_auto_apply.py
@@ -104,7 +104,7 @@ def test_sweep_skips_under_supported_head(db_sync):
 
 def test_sweep_skips_ungraduated_head(db_sync):
     # auto_apply_threshold is None (head never reached the precision bar).
-    img = _img(db_sync, "d" * 64, _emb(0))
+    _img(db_sync, "d" * 64, _emb(0))
     tag = Tag(name="nograd", kind=TagKind.general)
     db_sync.add(tag)
     db_sync.flush()