diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1e50c57..323bfc6 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -20,7 +20,7 @@ jobs:
   test_spin:
     strategy:
       matrix:
-        python_version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
+        python_version: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15-dev"]
         os: [ubuntu-latest, windows-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
diff --git a/pyproject.toml b/pyproject.toml
index 8a04ba0..27b4959 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,6 +24,7 @@ classifiers = [
   "Programming Language :: Python :: 3.12",
   "Programming Language :: Python :: 3.13",
   "Programming Language :: Python :: 3.14",
+  "Programming Language :: Python :: 3.15",
   "Programming Language :: Python :: 3 :: Only",
 ]
 dependencies = [