diff --git a/odc/loader/testing/mem_reader.py b/odc/loader/_zarr.py
similarity index 99%
rename from odc/loader/testing/mem_reader.py
rename to odc/loader/_zarr.py
index 6b294fb..10d7a81 100644
--- a/odc/loader/testing/mem_reader.py
+++ b/odc/loader/_zarr.py
@@ -1,5 +1,5 @@
 """
-Reader Driver from in-memory xarray.
+Reader Driver from in-memory xarray/zarr spec docs.
 """
 
 from __future__ import annotations
@@ -14,7 +14,7 @@
 from odc.geo.geobox import GeoBox
 from odc.geo.xr import ODCExtensionDa, ODCExtensionDs, xr_coords, xr_reproject
 
-from ..types import (
+from .types import (
     BandKey,
     DaskRasterReader,
     FixedCoord,
diff --git a/odc/loader/test_memreader.py b/odc/loader/test_memreader.py
index 1eeddc6..5741bbb 100644
--- a/odc/loader/test_memreader.py
+++ b/odc/loader/test_memreader.py
@@ -14,7 +14,7 @@
 from odc.geo.geobox import GeoBox
 from odc.geo.xr import ODCExtensionDa, ODCExtensionDs, rasterize
 
-from .testing.mem_reader import Context, XrMemReader, XrMemReaderDriver, raster_group_md
+from ._zarr import Context, XrMemReader, XrMemReaderDriver, raster_group_md
 from .types import FixedCoord, RasterGroupMetadata, RasterLoadParams, RasterSource
 
 # pylint: disable=missing-function-docstring,use-implicit-booleaness-not-comparison