diff --git a/cubed/core/ops.py b/cubed/core/ops.py
index d9154183..f7902c4e 100644
--- a/cubed/core/ops.py
+++ b/cubed/core/ops.py
@@ -713,24 +713,6 @@ def _assemble_index_chunk(
     return out
 
 
-def _read_index_chunk(
-    x,
-    *arrays,
-    target_chunks=None,
-    selection=None,
-    block_id=None,
-):
-    array = arrays[0].zarray
-    idx = block_id
-    # Note that since we only have a maximum of one integer array index
-    # we don't need to use Zarr orthogonal indexing, since it is
-    # "available directly on the array" according to
-    # https://zarr.readthedocs.io/en/stable/tutorial.html#orthogonal-indexing
-    out = array[_target_chunk_selection(target_chunks, idx, selection)]
-    out = numpy_array_to_backend_array(out)
-    return out
-
-
 def _target_chunk_selection(target_chunks, idx, selection):
     # integer, integer array, and slice indexes can be interspersed in selection
     # idx is the chunk index for the output (target_chunks)
diff --git a/cubed/tests/test_core.py b/cubed/tests/test_core.py
index afab1ee4..14569003 100644
--- a/cubed/tests/test_core.py
+++ b/cubed/tests/test_core.py
@@ -599,9 +599,7 @@ def test_array_pickle(spec, executor):
 
 @pytest.mark.skipif(platform.system() == "Windows", reason="does not run on windows")
 def test_measure_reserved_mem(executor):
-    pytest.importorskip("lithops")
-
-    if executor.name != "lithops":
+    if executor.name not in ("processes", "lithops"):
         pytest.skip(f"{executor.name} executor does not support measure_reserved_mem")
 
     reserved_memory = cubed.measure_reserved_mem(executor=executor)