diff --git a/dkist/wcs/models.py b/dkist/wcs/models.py
index 430edb092..40395300b 100755
--- a/dkist/wcs/models.py
+++ b/dkist/wcs/models.py
@@ -310,11 +310,7 @@ def evaluate(self, lon, lat, z, crpix, cdelt, lon_pole, **kwargs):
         return self._map_transform(lon, lat, z, crpix=crpix, cdelt=cdelt, lon_pole=lon_pole, inverse=True)
 
 
-class BaseVaryingCelestialTransform2D(BaseVaryingCelestialTransform, ABC):
-    pass
-
-
-class VaryingCelestialTransform2D(BaseVaryingCelestialTransform2D):
+class VaryingCelestialTransform2D(BaseVaryingCelestialTransform):
     n_inputs = 4
     n_outputs = 2
 
@@ -363,11 +359,7 @@ def evaluate(self, lon, lat, z, q, crpix, cdelt, lon_pole, **kwargs):
         return self._map_transform(lon, lat, z, q, crpix=crpix, cdelt=cdelt, lon_pole=lon_pole,
                                    inverse=True)
 
-class BaseVaryingCelestialTransform3D(BaseVaryingCelestialTransform, ABC):
-    pass
-
-
-class VaryingCelestialTransform3D(BaseVaryingCelestialTransform3D):
+class VaryingCelestialTransform3D(BaseVaryingCelestialTransform):
     n_inputs = 5
     n_outputs = 2