diff --git a/pkgs/development/python-modules/ome-zarr-models/default.nix b/pkgs/development/python-modules/ome-zarr-models/default.nix
index 2446794262ad..cacc2b72cd26 100644
--- a/pkgs/development/python-modules/ome-zarr-models/default.nix
+++ b/pkgs/development/python-modules/ome-zarr-models/default.nix
@@ -9,6 +9,7 @@
   hatchling,
 
   # dependencies
+  numpy,
   pydantic,
   pydantic-zarr,
   zarr,
@@ -17,29 +18,32 @@
   aiohttp,
   fsspec,
   pytest-cov-stub,
+  pytest-doctestplus,
   pytest-vcr,
   pytestCheckHook,
 }:
 
 buildPythonPackage (finalAttrs: {
   pname = "ome-zarr-models";
-  version = "1.7";
+  version = "1.8.1";
   pyproject = true;
-  __structuredAttrs = true;
 
   src = fetchFromGitHub {
     owner = "ome-zarr-models";
     repo = "ome-zarr-models-py";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-UT/LvbTGo6UueEUwELqnfhERvxtg04Ukrcpo1yTa80c=";
+    hash = "sha256-yC62hrlv3OOSXp6c3et3ZRa51iMHQkyXv1W7eyJCxlM=";
   };
 
+  pythonRelaxDeps = [ "pydantic" ];
+
   build-system = [
     hatch-vcs
     hatchling
   ];
 
   dependencies = [
+    numpy
     pydantic
     pydantic-zarr
     zarr
@@ -51,14 +55,19 @@ buildPythonPackage (finalAttrs: {
     aiohttp
     fsspec
     pytest-cov-stub
+    pytest-doctestplus
     pytest-vcr
     pytestCheckHook
   ];
 
+  pytestFlags = [ "--override-ini=testpaths=tests" ];
+
   disabledTests = [
     # Require internet connection
     "test_bioformats2raw_get_image"
     "test_load_remote_data"
+    # AssertionError
+    "test_get_all_zarrs"
   ]
   ++ lib.optionals (pythonAtLeast "3.14") [
     # pydantic.errors.PydanticUserError: `Image` is not fully defined; you should define all