diff --git a/.github/workflows/schedule_tests.yml b/.github/workflows/schedule_tests.yml
index 402659b33828..5490c35a4cfe 100644
--- a/.github/workflows/schedule_tests.yml
+++ b/.github/workflows/schedule_tests.yml
@@ -19,6 +19,7 @@ jobs:
           - '3.12'
           - '3.13'
           - '3.14'
+          - '3.15-dev'
     name: Windows, SQLite, Python ${{ matrix.python-version }}
     continue-on-error: true
     steps:
diff --git a/tests/requirements/py3.txt b/tests/requirements/py3.txt
index 4fbf425e4879..e07f97ef6923 100644
--- a/tests/requirements/py3.txt
+++ b/tests/requirements/py3.txt
@@ -6,8 +6,8 @@ black >= 25.9.0
 docutils >= 0.22
 geoip2 >= 4.8.0
 jinja2 >= 2.11.0
-numpy >= 1.26.0
-Pillow >= 10.1.0
+numpy >= 1.26.0; sys.platform != 'win32' or python_version < '3.15'
+Pillow >= 10.1.0; sys.platform != 'win32' or python_version < '3.15'
 # pylibmc/libmemcached can't be built on Windows.
 pylibmc; sys_platform != 'win32'
 pymemcache >= 3.4.0