diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 8f968ec8e..7091369ae 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -67,6 +67,8 @@ Internal changes
     * Adjusted `mypy` checks to be more standardized.
 * Renamed annual deprecated frequency alias `"A"` to `"Y"` (:pull:`1930`).
 * The ``indices`` documentation now includes the members of ``xclim.indices.stats``. (:issue:`1913`, :pull:`1958`).
+* The default URL for fetching testing data is now set to the ``raw.githubusercontent.com`` mirror of `xclim-testdata`. (:pull:`1961`).
+* The ``upstream`` `tox` environment has been updated to not install the latest `numpy` until `numba` supports it. (:pull:`1961`).
 
 CI changes
 ^^^^^^^^^^
diff --git a/CI/requirements_upstream.txt b/CI/requirements_upstream.txt
index 9650a59df..fdda5324c 100644
--- a/CI/requirements_upstream.txt
+++ b/CI/requirements_upstream.txt
@@ -1,5 +1,5 @@
 bottleneck @ git+https://github.com/pydata/bottleneck.git@master
 cftime @ git+https://github.com/Unidata/cftime.git@master
 flox @ git+https://github.com/xarray-contrib/flox.git@main
-numpy @ git+https://github.com/numpy/numpy.git@main
+# numpy @ git+https://github.com/numpy/numpy.git@main
 xarray @ git+https://github.com/pydata/xarray.git@main
diff --git a/tests/test_indices.py b/tests/test_indices.py
index 2b707f8c1..28f5032a5 100644
--- a/tests/test_indices.py
+++ b/tests/test_indices.py
@@ -499,6 +499,7 @@ class TestStandardizedIndices:
     # Repeated tests with lower tolerance means we want a more precise comparison, so we compare
     # the current version of XClim with the version where the test was implemented
     @pytest.mark.slow
+    @pytest.mark.filterwarnings("ignore:dt.weekofyear and dt.week have been deprecated")
     @pytest.mark.parametrize(
         "freq, window, dist, method,  values, diff_tol",
         [
@@ -2227,6 +2228,7 @@ def test_static_freeze_thaw_cycles(self, tasmin_series, tasmax_series):
 
 
 class TestTemperatureSeasonality:
+
     def test_simple(self, tas_series):
         a = np.zeros(365)
         a = tas_series(a + K2C, start="1971-01-01")
diff --git a/xclim/testing/utils.py b/xclim/testing/utils.py
index e710f9314..dad66b212 100644
--- a/xclim/testing/utils.py
+++ b/xclim/testing/utils.py
@@ -74,7 +74,9 @@
 default_testdata_version = "v2024.8.23"
 """Default version of the testing data to use when fetching datasets."""
 
-default_testdata_repo_url = "https://github.com/Ouranosinc/xclim-testdata"
+default_testdata_repo_url = (
+    "https://raw.githubusercontent.com/Ouranosinc/xclim-testdata/"
+)
 """Default URL of the testing data repository to use when fetching datasets."""
 
 try:
@@ -433,7 +435,7 @@ def load_registry(
     dict
         Dictionary of filenames and hashes.
     """
-    remote_registry = audit_url(f"{repo}/raw/{branch}/data/registry.txt")
+    remote_registry = audit_url(f"{repo}/{branch}/data/registry.txt")
 
     if branch != default_testdata_version:
         custom_registry_folder = Path(
@@ -510,7 +512,7 @@ def nimbus(  # noqa: PR01
             "You can install it with `pip install pooch` or `pip install xclim[dev]`."
         )
 
-    remote = audit_url(f"{repo}/raw/{branch}/data")
+    remote = audit_url(f"{repo}/{branch}/data")
     return pooch.create(
         path=cache_dir,
         base_url=remote,