diff --git a/requirements-dev.txt b/requirements-dev.txt
index ae45a57..78591c2 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,4 +5,4 @@ flake8
 black
 wheel
 packaging
--rrequirements.txt
\ No newline at end of file
+-r requirements.txt
diff --git a/test/__init__.py b/test/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/test/test_HedwigZarrImages.py b/test/test_HedwigZarrImages.py
index 8b7acc5..b1fa0b3 100644
--- a/test/test_HedwigZarrImages.py
+++ b/test/test_HedwigZarrImages.py
@@ -35,10 +35,34 @@ def temp_zarr_path(request, tmp_path_factory, data_path):
 
 
 @pytest.mark.parametrize(
-    "zarr_name",
-    ["2013-1220-dA30_5-BSC-1_22_full_rec.zarr", "OM_P1_S1_ScanOnly_1k.zarr", "OM_P1_S1_ScanOnly_1k_tiff.zarr"],
+    "zarr_name, image_ext, array_shape, dims, shader_type, ngff_dims, shader_params",
+    [(
+        "2013-1220-dA30_5-BSC-1_22_full_rec.zarr",
+        "mrc",
+        (1, 1, 512, 87, 512),
+        'XYZ',
+        'Grayscale',
+        'TCZYX',
+        {"window": [263, 413], "range": [-2664, 1677]}
+    ), (
+        "OM_P1_S1_ScanOnly_1k.zarr",
+        "png",
+        (1, 3, 1, 1024, 521),
+        "XYC",
+        "RGB",
+        "TCZYX",
+        {}
+    ), (
+        "OM_P1_S1_ScanOnly_1k_tiff.zarr",
+        "tiff",
+        (1, 3, 1, 1024, 521),
+        "XYC",
+        "RGB",
+        "TCZYX",
+        {}
+    )],
 )
-def test_HedwigZarrImage_info(data_path, zarr_name):
+def test_HedwigZarrImage_info(data_path, zarr_name, image_ext, array_shape, dims, shader_type, ngff_dims, shader_params):
     zi = HedwigZarrImages(data_path / zarr_name)
     keys = list(zi.get_series_keys())
     print(f"zarr groups: {keys}")
@@ -46,13 +70,13 @@ def test_HedwigZarrImage_info(data_path, zarr_name):
     print(zi.ome_xml_path)
 
     for k, z_img in zi.series():
-        print(f'image name: "{k}"')
-        print(f"\tarray shape: {z_img.shape}")
-        print(f"\tzarr path: {z_img.path}")
-        print(f"\tdims: {z_img.dims}")
-        print(f"\tshader type: {z_img.shader_type}")
-        print(f"\tNGFF dims: {z_img._ome_ngff_multiscale_dims()}")
-        print(f"\tshader params: {json.dumps(z_img.neuroglancer_shader_parameters())}")
+        assert image_ext in k
+        assert array_shape == z_img.shape
+        print(f"{z_img.path=}")
+        assert dims == z_img.dims
+        assert shader_type == z_img.shader_type
+        assert ngff_dims == z_img._ome_ngff_multiscale_dims()
+        assert shader_params == z_img.neuroglancer_shader_parameters()
 
 
 @pytest.mark.parametrize(