diff --git a/pyproject.toml b/pyproject.toml
index 3dc46a0f9..0cd3cd2bc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -234,7 +234,6 @@ ignore = [
     "PT005",  # deprecated
     "PT011",  # TODO: apply this rule
     "PT012",  # TODO: apply this rule
-    "PYI013",
     "RET505",
     "RET506",
     "RUF005",
diff --git a/src/zarr/abc/codec.py b/src/zarr/abc/codec.py
index 73b1a598b..354887440 100644
--- a/src/zarr/abc/codec.py
+++ b/src/zarr/abc/codec.py
@@ -156,20 +156,14 @@ async def encode(
 class ArrayArrayCodec(BaseCodec[NDBuffer, NDBuffer]):
     """Base class for array-to-array codecs."""
 
-    ...
-
 
 class ArrayBytesCodec(BaseCodec[NDBuffer, Buffer]):
     """Base class for array-to-bytes codecs."""
 
-    ...
-
 
 class BytesBytesCodec(BaseCodec[Buffer, Buffer]):
     """Base class for bytes-to-bytes codecs."""
 
-    ...
-
 
 Codec = ArrayArrayCodec | ArrayBytesCodec | BytesBytesCodec