diff --git a/tests/test_api_admin.py b/tests/test_api_admin.py
index 4869e22..ce303ac 100644
--- a/tests/test_api_admin.py
+++ b/tests/test_api_admin.py
@@ -117,11 +117,11 @@ async def test_bulk_delete_dry_run_returns_counts(client, db, tmp_path):
     await db.flush()
     i1 = ImageRecord(
         artist_id=a.id, path=str(tmp_path / "1.jpg"),
-        sha256="1" * 64, size_bytes=10,
+        sha256="1" * 64, size_bytes=10, mime="image/jpeg",
     )
     i2 = ImageRecord(
         artist_id=a.id, path=str(tmp_path / "2.jpg"),
-        sha256="2" * 64, size_bytes=20,
+        sha256="2" * 64, size_bytes=20, mime="image/jpeg",
     )
     db.add_all([i1, i2])
     await db.commit()
@@ -169,7 +169,7 @@ async def test_bulk_delete_wrong_confirm_400_with_expected_token(
     await db.flush()
     img = ImageRecord(
         artist_id=a.id, path=str(tmp_path / "x.jpg"),
-        sha256="c" * 64, size_bytes=10,
+        sha256="c" * 64, size_bytes=10, mime="image/jpeg",
     )
     db.add(img)
     await db.commit()
@@ -196,7 +196,7 @@ async def test_bulk_delete_correct_confirm_dispatches(
     await db.flush()
     img = ImageRecord(
         artist_id=a.id, path=str(tmp_path / "x.jpg"),
-        sha256="d" * 64, size_bytes=10,
+        sha256="d" * 64, size_bytes=10, mime="image/jpeg",
     )
     db.add(img)
     await db.commit()
@@ -323,7 +323,7 @@ async def test_prune_unused_dry_run_lists_unused(client, db, tmp_path):
     await db.flush()
     img = ImageRecord(
         artist_id=a.id, path=str(tmp_path / "p.jpg"),
-        sha256="e" * 64, size_bytes=10,
+        sha256="e" * 64, size_bytes=10, mime="image/jpeg",
     )
     db.add(img)
     used = Tag(name="kept", kind=TagKind.general)
diff --git a/tests/test_cleanup_service.py b/tests/test_cleanup_service.py
index df632fa..f40113a 100644
--- a/tests/test_cleanup_service.py
+++ b/tests/test_cleanup_service.py
@@ -21,6 +21,7 @@ def _make_image(db_sync, *, artist, path, sha256, size=1000, thumb=None):
         path=path,
         sha256=sha256,
         size_bytes=size,
+        mime="image/jpeg",
         thumbnail_path=thumb,
     )
     db_sync.add(img)
diff --git a/tests/test_tasks_admin.py b/tests/test_tasks_admin.py
index da38e2b..332cdd1 100644
--- a/tests/test_tasks_admin.py
+++ b/tests/test_tasks_admin.py
@@ -4,10 +4,10 @@ task_always_eager + signal handlers from FC-3i populate task_run.
 We assert the wrapper passes args through correctly and that
 task_run lifecycle status flips as expected.
 """
-import backend.app.tasks.admin  # noqa: F401 — register tasks
 import pytest
 from sqlalchemy import func, select
 
+import backend.app.tasks.admin  # noqa: F401 — register tasks
 from backend.app.celery_app import celery
 from backend.app.models import Artist, ImageRecord, TaskRun
 
@@ -59,7 +59,7 @@ async def test_delete_artist_cascade_task_removes_artist_and_records_ok(
         f.write_bytes(b"x")
         db_sync.add(ImageRecord(
             artist_id=a.id, path=str(f),
-            sha256=f"{i:064x}", size_bytes=10,
+            sha256=f"{i:064x}", size_bytes=10, mime="image/jpeg",
         ))
     db_sync.commit()
     artist_id = a.id
@@ -122,7 +122,7 @@ async def test_bulk_delete_images_task_removes_listed_images(
         f.write_bytes(b"x")
         img = ImageRecord(
             artist_id=a.id, path=str(f),
-            sha256=f"a{i:063x}", size_bytes=10,
+            sha256=f"a{i:063x}", size_bytes=10, mime="image/jpeg",
         )
         db_sync.add(img)
         db_sync.flush()