diff --git a/model_server/extensions/chaeo/tests/test_accessors.py b/model_server/extensions/chaeo/tests/test_accessors.py
deleted file mode 100644
index c51f31ca49af2694c0cec8306920ff557d463b75..0000000000000000000000000000000000000000
--- a/model_server/extensions/chaeo/tests/test_accessors.py
+++ /dev/null
@@ -1,73 +0,0 @@
-import unittest
-
-import numpy as np
-
-from model_server.conf.testing import monozstackmask
-from base.accessors import PatchStack, make_patch_stack_from_file, FileNotFoundError
-
-
-class TestMultipositionCziImageFileAccess(unittest.TestCase):
-    def setUp(self) -> None:
-        pass
-
-    def test_make_patch_stack_from_3d_array(self):
-        w = 256
-        h = 512
-        n = 4
-        acc = PatchStack(np.random.rand(n, h, w, 1, 1))
-        self.assertEqual(acc.count, n)
-        self.assertEqual(acc.hw, (h, w))
-        self.assertEqual(acc.pyxcz.shape, (n, h, w, 1, 1))
-
-    def test_make_patch_stack_from_list(self):
-        w = 256
-        h = 512
-        n = 4
-        acc = PatchStack([np.random.rand(h, w, 1, 1) for _ in range(0, n)])
-        self.assertEqual(acc.count, n)
-        self.assertEqual(acc.hw, (h, w))
-        self.assertEqual(acc.pyxcz.shape, (n, h, w, 1, 1))
-        return acc
-
-
-    def test_make_patch_stack_from_file(self):
-        h = monozstackmask['h']
-        w = monozstackmask['w']
-        c = monozstackmask['c']
-        n = monozstackmask['z']
-
-        acc = make_patch_stack_from_file(monozstackmask['path'])
-        self.assertEqual(acc.hw, (h, w))
-        self.assertEqual(acc.count, n)
-        self.assertEqual(acc.pyxcz.shape, (n, h, w, c, 1))
-
-    def test_raises_filenotfound(self):
-        with self.assertRaises(FileNotFoundError):
-            acc = make_patch_stack_from_file('c:/fake/file/name.tif')
-
-    def test_make_3d_patch_stack_from_nonuniform_list(self):
-        w = 256
-        h = 512
-        c = 1
-        nz = 5
-        n = 4
-
-        patches = [np.random.rand(h, w, c, nz) for _ in range(0, n)]
-        patches.append(np.random.rand(h, 2 * w, c, nz))
-        acc = PatchStack(patches)
-        self.assertEqual(acc.count, n + 1)
-        self.assertEqual(acc.hw, (h, 2 * w))
-        self.assertEqual(acc.chroma, c)
-        self.assertEqual(acc.iat(0).shape, (h, 2 * w, c, nz))
-        self.assertEqual(acc.iat_yxcz(0).shape, (h, 2 * w, c, nz))
-
-    def test_pczyx(self):
-        w = 256
-        h = 512
-        n = 4
-        nz = 15
-        nc = 2
-        acc = PatchStack(np.random.rand(n, h, w, nc, nz))
-        self.assertEqual(acc.count, n)
-        self.assertEqual(acc.pczyx.shape, (n, nc, nz, h, w))
-        self.assertEqual(acc.hw, (h, w))
diff --git a/model_server/extensions/ilastik/validators.py b/model_server/extensions/ilastik/validators.py
deleted file mode 100644
index 28d92c15b79bf923b1cb4098bfc688e47d7b3896..0000000000000000000000000000000000000000
--- a/model_server/extensions/ilastik/validators.py
+++ /dev/null
@@ -1,5 +0,0 @@
-from model_server.base.accessors import GenericImageDataAccessor
-
-def is_object_map(img: GenericImageDataAccessor):
-    # TODO: implement
-    pass
\ No newline at end of file
diff --git a/tests/test_accessors.py b/tests/test_accessors.py
index 3bad0c96052766a4beb5aaadd4e564de8bd02599..d622a368dae6e89a24dabf1044391092f48b88b5 100644
--- a/tests/test_accessors.py
+++ b/tests/test_accessors.py
@@ -2,6 +2,9 @@ import unittest
 
 import numpy as np
 
+from base.accessors import PatchStack, make_patch_stack_from_file, FileNotFoundError
+from conf.testing import monozstackmask
+
 from model_server.conf.testing import czifile, output_path, monopngfile, rgbpngfile, tifffile, monozstackmask
 from model_server.base.accessors import CziImageFileAccessor, DataShapeError, generate_file_accessor, InMemoryDataAccessor, PngFileAccessor, write_accessor_data_to_file, TifSingleSeriesFileAccessor
 
@@ -115,4 +118,71 @@ class TestCziImageFileAccess(unittest.TestCase):
     def test_read_in_pixel_scale_from_czi(self):
         cf = CziImageFileAccessor(czifile['path'])
         pxs = cf.pixel_scale_in_micrometers
-        self.assertAlmostEqual(pxs['X'], czifile['um_per_pixel'], places=3)
\ No newline at end of file
+        self.assertAlmostEqual(pxs['X'], czifile['um_per_pixel'], places=3)
+
+
+class TestPatchStackAccessor(unittest.TestCase):
+    def setUp(self) -> None:
+        pass
+
+    def test_make_patch_stack_from_3d_array(self):
+        w = 256
+        h = 512
+        n = 4
+        acc = PatchStack(np.random.rand(n, h, w, 1, 1))
+        self.assertEqual(acc.count, n)
+        self.assertEqual(acc.hw, (h, w))
+        self.assertEqual(acc.pyxcz.shape, (n, h, w, 1, 1))
+
+    def test_make_patch_stack_from_list(self):
+        w = 256
+        h = 512
+        n = 4
+        acc = PatchStack([np.random.rand(h, w, 1, 1) for _ in range(0, n)])
+        self.assertEqual(acc.count, n)
+        self.assertEqual(acc.hw, (h, w))
+        self.assertEqual(acc.pyxcz.shape, (n, h, w, 1, 1))
+        return acc
+
+
+    def test_make_patch_stack_from_file(self):
+        h = monozstackmask['h']
+        w = monozstackmask['w']
+        c = monozstackmask['c']
+        n = monozstackmask['z']
+
+        acc = make_patch_stack_from_file(monozstackmask['path'])
+        self.assertEqual(acc.hw, (h, w))
+        self.assertEqual(acc.count, n)
+        self.assertEqual(acc.pyxcz.shape, (n, h, w, c, 1))
+
+    def test_raises_filenotfound(self):
+        with self.assertRaises(FileNotFoundError):
+            acc = make_patch_stack_from_file('c:/fake/file/name.tif')
+
+    def test_make_3d_patch_stack_from_nonuniform_list(self):
+        w = 256
+        h = 512
+        c = 1
+        nz = 5
+        n = 4
+
+        patches = [np.random.rand(h, w, c, nz) for _ in range(0, n)]
+        patches.append(np.random.rand(h, 2 * w, c, nz))
+        acc = PatchStack(patches)
+        self.assertEqual(acc.count, n + 1)
+        self.assertEqual(acc.hw, (h, 2 * w))
+        self.assertEqual(acc.chroma, c)
+        self.assertEqual(acc.iat(0).shape, (h, 2 * w, c, nz))
+        self.assertEqual(acc.iat_yxcz(0).shape, (h, 2 * w, c, nz))
+
+    def test_pczyx(self):
+        w = 256
+        h = 512
+        n = 4
+        nz = 15
+        nc = 2
+        acc = PatchStack(np.random.rand(n, h, w, nc, nz))
+        self.assertEqual(acc.count, n)
+        self.assertEqual(acc.pczyx.shape, (n, nc, nz, h, w))
+        self.assertEqual(acc.hw, (h, w))