diff --git a/_scripts/sync-releases.py b/_scripts/sync-releases.py
index d5836ce..6a3c3d8 100755
--- a/_scripts/sync-releases.py
+++ b/_scripts/sync-releases.py
@@ -65,7 +65,7 @@ class Docs:
 )
 
 
-class SyncReleasesException(Exception):
+class SyncError(Exception):
     pass
 
 
@@ -134,9 +134,7 @@ def main() -> None:
             expected_hash = artifact['digest'].replace('sha256:', '')
             found_hash = sha256(resp.content).hexdigest()
             if expected_hash != found_hash:
-                raise SyncReleasesException(
-                    f'SHA-256 {found_hash} != {expected_hash}'
-                )
+                raise SyncError(f'SHA-256 {found_hash} != {expected_hash}')
 
             # unpack
             docdir = DOCROOT / proj.docs.subdir
diff --git a/demo/_synctiles.py b/demo/_synctiles.py
index d8ba884..37fed19 100755
--- a/demo/_synctiles.py
+++ b/demo/_synctiles.py
@@ -213,7 +213,7 @@ class StatusMetadata(TypedDict):
     stamp: str | None
 
 
-class SyncTilesException(Exception):
+class SyncError(Exception):
     pass
 
 
@@ -715,7 +715,7 @@ def retile_slide(
     # Tile slide
     slide_info = context['slides'].get(slide_relpath.as_posix())
     if slide_info is None:
-        raise SyncTilesException(f'No such slide {slide_relpath}')
+        raise SyncError(f'No such slide {slide_relpath}')
     metadata = sync_slide(
         context['stamp'], storage, slide_relpath, slide_info, workers
     )
@@ -851,4 +851,4 @@ def finish_retile(ctxfile: TextIO, summarydir: Path) -> None:
     elif args.cmd == 'finish':
         finish_retile(args.context_file, args.summary_dir)
     else:
-        raise SyncTilesException('unimplemented subcommand')
+        raise SyncError('unimplemented subcommand')