diff --git a/python-spec/src/somacore/ephemeral/collections.py b/python-spec/src/somacore/ephemeral/collections.py
index 583ed94..b3328b0 100644
--- a/python-spec/src/somacore/ephemeral/collections.py
+++ b/python-spec/src/somacore/ephemeral/collections.py
@@ -194,9 +194,9 @@ def add_multiscale_image(
         *,
         uri: str,
         type: pa.DataType,
-        image_type: str = "CYX",  # TODO: Replace this arg after PR #219 is merged
         reference_level_shape: Sequence[int],
         axis_names: Sequence[str] = ("c", "x", "y"),
+        axis_types: Sequence[str] = ("channel", "height", "width"),
     ) -> spatial.MultiscaleImage:
         raise NotImplementedError()