diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 3a3ecd05..41330f77 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -19,7 +19,7 @@ repos:
         - test_requirements.txt
 
 - repo: https://github.com/psf/black
-  rev: 24.4.2
+  rev: 24.8.0
   hooks:
   - id: black
     language_version: python3
@@ -31,12 +31,12 @@ repos:
 
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.5.0
+  rev: v0.5.7
   hooks:
     - id: ruff
 
 - repo: https://github.com/tox-dev/pyproject-fmt
-  rev: 2.1.3
+  rev: 2.2.1
   hooks:
     - id: pyproject-fmt
 
diff --git a/compliance_checker/cf/cf_1_6.py b/compliance_checker/cf/cf_1_6.py
index 2bf0f74a..c1280d96 100644
--- a/compliance_checker/cf/cf_1_6.py
+++ b/compliance_checker/cf/cf_1_6.py
@@ -3340,7 +3340,7 @@ def check_packed_data(self, ds):
 
             # IMPLEMENTATION CONFORMANCE 8.1 REQUIRED 1/3
             # scale_factor and add_offset same type
-            if type(add_offset) != type(scale_factor):
+            if not isinstance(add_offset, type(scale_factor)):
                 valid = False
                 reasoning.append(
                     "Attributes add_offset and scale_factor have different data type.",
@@ -3350,7 +3350,7 @@ def check_packed_data(self, ds):
             # if not the same type
             # FIXME: Check add_offset too.
 
-            elif type(scale_factor) != var.dtype.type:
+            elif not isinstance(scale_factor, var.dtype.type):
                 # Check both attributes are type float or double
                 if not isinstance(scale_factor, (float, np.floating)):
                     valid = False
diff --git a/compliance_checker/cf/cf_1_9.py b/compliance_checker/cf/cf_1_9.py
index 73211e44..3fcf5dfe 100644
--- a/compliance_checker/cf/cf_1_9.py
+++ b/compliance_checker/cf/cf_1_9.py
@@ -150,7 +150,10 @@ def check_domain_variables(self, ds: Dataset):
                     continue
                 appendix_a_not_recommended_attrs = []
                 for attr_name in domain_var.ncattrs():
-                    if attr_name in self.appendix_a and "D" not in self.appendix_a[attr_name]["attr_loc"]:
+                    if (
+                        attr_name in self.appendix_a
+                        and "D" not in self.appendix_a[attr_name]["attr_loc"]
+                    ):
                         appendix_a_not_recommended_attrs.append(attr_name)
 
                 if appendix_a_not_recommended_attrs:
@@ -163,10 +166,12 @@ def check_domain_variables(self, ds: Dataset):
                 # no errors occurred
                 domain_valid.score += 1
 
-
             # IMPLEMENTATION CONFORMANCE 5.8 REQUIRED 4/4
             if hasattr(domain_var, "cell_measures"):
-                cell_measures_var_names = regex.findall(r"\b(?:area|volume):\s+(\w+)", domain_var.cell_measures)
+                cell_measures_var_names = regex.findall(
+                    r"\b(?:area|volume):\s+(\w+)",
+                    domain_var.cell_measures,
+                )
                 # check exist
                 for var_name in cell_measures_var_names:
                     try:
@@ -174,10 +179,16 @@ def check_domain_variables(self, ds: Dataset):
                     except ValueError:
                         # TODO: what to do here?
                         continue
-                    domain_coord_var_names = {var_like.name for var_like in domain_coord_vars}
-                    domain_valid.assert_true(set(cell_measures_variable.dimensions).issubset(domain_coord_var_names),
-                                             "Variables named in the cell_measures attributes must have a dimensions attribute with "
-                                             "values that are a subset of the referring domain variable's dimension attribute")
+                    domain_coord_var_names = {
+                        var_like.name for var_like in domain_coord_vars
+                    }
+                    domain_valid.assert_true(
+                        set(cell_measures_variable.dimensions).issubset(
+                            domain_coord_var_names,
+                        ),
+                        "Variables named in the cell_measures attributes must have a dimensions attribute with "
+                        "values that are a subset of the referring domain variable's dimension attribute",
+                    )
 
             results.append(domain_valid.to_result())
 
diff --git a/compliance_checker/protocols/zarr.py b/compliance_checker/protocols/zarr.py
index f111624c..517ce9e1 100644
--- a/compliance_checker/protocols/zarr.py
+++ b/compliance_checker/protocols/zarr.py
@@ -1,3 +1,4 @@
+import platform
 import zipfile
 from pathlib import Path
 from urllib.parse import urlparse
@@ -6,7 +7,11 @@
 
 from compliance_checker.protocols import netcdf
 
-#
+
+def _fix_windows_slashes(zarr_url):
+    if platform.system() == "Windows":
+        zarr_url = zarr_url.replace("///", "//")
+    return zarr_url
 
 
 def is_zarr(url):
@@ -55,10 +60,9 @@ def as_zarr(url):
     pr = urlparse(str(url))
 
     if "mode=nczarr" in pr.fragment:
-        if pr.netloc:
-            return str(url)  # already valid nczarr url
-        elif pr.scheme == "file":
-            return str(url)  # already valid nczarr url
+        if pr.netloc or pr.scheme == "file":
+            url = _fix_windows_slashes(url)
+        return url
 
     zarr_url = Path(
         url2pathname(pr.path),
@@ -78,4 +82,5 @@ def as_zarr(url):
     url_base = url if mode == "s3" else zarr_url.as_uri()
 
     zarr_url = f"{url_base}#mode=nczarr,{mode}"
+    zarr_url = _fix_windows_slashes(zarr_url)
     return zarr_url
diff --git a/compliance_checker/suite.py b/compliance_checker/suite.py
index 6b534f5f..6a4281e2 100644
--- a/compliance_checker/suite.py
+++ b/compliance_checker/suite.py
@@ -6,7 +6,6 @@
 import inspect
 import itertools
 import os
-import platform
 import re
 import subprocess
 import sys
@@ -893,10 +892,6 @@ def load_local_dataset(self, ds_str):
             ds_str = self.generate_dataset(ds_str)
 
         if zarr.is_zarr(ds_str):
-            if platform.system() != "Linux":
-                print(
-                    f"WARNING: {platform.system()} OS detected. NCZarr is not officially supported for your OS as of when this API was written. Your mileage may vary.",
-                )
             return Dataset(zarr.as_zarr(ds_str))
 
         if netcdf.is_netcdf(ds_str):
diff --git a/compliance_checker/tests/test_cf.py b/compliance_checker/tests/test_cf.py
index f053f837..65088f84 100644
--- a/compliance_checker/tests/test_cf.py
+++ b/compliance_checker/tests/test_cf.py
@@ -3249,7 +3249,7 @@ def test_domain(self):
         dataset.createDimension("lat", 20)
         dataset.createDimension("depth", 20)
         domain_var.setncattr("dimensions", "lon lat depth")
-        cube = dataset.createVariable("cube", "f8", ("lon", "lat", "depth"))
+        dataset.createVariable("cube", "f8", ("lon", "lat", "depth"))
         # OK, coordinates in cell_measures are subset of coordinates of
         # referring domain variable's coordinates attribute
         results = self.cf.check_domain_variables(dataset)
@@ -3258,10 +3258,12 @@ def test_domain(self):
         domain_var.cell_measures = "volume: cube_bad"
         dataset.createVariable("cube_bad", "f8", ("lon", "lat", "depth", "time"))
         results = self.cf.check_domain_variables(dataset)
-        self.assertTrue("Variables named in the cell_measures attributes must "
-                        "have a dimensions attribute with values that are a "
-                        "subset of the referring domain variable's dimension "
-                        "attribute" in results[0].msgs)
+        self.assertTrue(
+            "Variables named in the cell_measures attributes must "
+            "have a dimensions attribute with values that are a "
+            "subset of the referring domain variable's dimension "
+            "attribute" in results[0].msgs,
+        )
         del dataset
         dataset = MockTimeSeries()
         # domain should be dimensionless -- currently not an error in
diff --git a/compliance_checker/tests/test_cli.py b/compliance_checker/tests/test_cli.py
index e1027db1..b77b565d 100644
--- a/compliance_checker/tests/test_cli.py
+++ b/compliance_checker/tests/test_cli.py
@@ -20,6 +20,13 @@
 
 from .conftest import datadir, static_files
 
+on_windows = platform.system() == "Windows"
+
+if on_windows:
+    ncconfig = ["sh", f"{os.environ['CONDA_PREFIX']}\\Library\\bin\\nc-config"]
+else:
+    ncconfig = ["nc-config"]
+
 
 @pytest.mark.usefixtures("checksuite_setup")
 class TestCLI:
@@ -221,32 +228,19 @@ def test_multi_checker_return_value(self, tmp_txt_file):
         assert not return_value
 
     def _check_libnetcdf_version():
-        if platform.system() == "Linux":
-            # nc-config doesn't work on windows... and neither does NCZarr so this skipif is mutually exclusive to the OS check skipif
-            return (
-                float(
-                    subprocess.check_output(
-                        ["nc-config", "--version"],
-                        encoding="UTF-8",
-                    )[9:12],
-                )
-                < 8.0
+        return (
+            float(
+                subprocess.check_output(
+                    ncconfig + ["--version"],
+                    encoding="UTF-8",
+                )[9:12],
             )
-        else:
-            return True
+            < 8.0
+        )
 
-    # TODO uncomment the third parameter once S3 support is working
-    @pytest.mark.skipif(
-        _check_libnetcdf_version(),
-        reason="NCZarr support was not available until netCDF version 4.8.0. Please upgrade to the latest libnetcdf version to test this functionality",
-    )
-    @pytest.mark.skipif(
-        platform.system() != "Linux",
-        reason="NCZarr is not officially supported for your OS as of when this API was written",
-    )
     @pytest.mark.skipif(
-        subprocess.check_output(["nc-config", "--has-nczarr"]) != b"yes\n",
-        reason="NCZarr support was not built with this netCDF version",
+        subprocess.check_output(ncconfig + ["--has-nczarr"]) != b"yes\n",
+        reason="NCZarr is not available.",
     )
     @pytest.mark.parametrize(
         "zarr_url",
@@ -255,7 +249,12 @@ def _check_libnetcdf_version():
             str(datadir / "zip.zarr"),
             # "s3://hrrrzarr/sfc/20210408/20210408_10z_anl.zarr#mode=nczarr,s3"
         ],
-        ids=["local_file", "zip_file"],  # ,'s3_url'
+        ids=[
+            "local_file",
+            "zip_file",
+            # TODO uncomment once S3 support is working.
+            # "s3_url",
+        ],
     )
     def test_nczarr_pass_through(self, zarr_url):
         """