diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a17f093..ae2442f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,17 +21,20 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.10"]
-        torch-version: ["1.12", "2.0"]
+        version:
+          - {python: "3.9", torch: "1.13"}
+          - {python: "3.10", torch: "2.0"}
+          - {python: "3.11", torch: "2.2"}
+          - {python: "3.12", torch: "2.4"}
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: ${{ matrix.version.python }}
       - name: Install dependencies
         run: |
           pip install pytest
-          pip install torch==${{ matrix.torch-version }} --extra-index-url https://download.pytorch.org/whl/cpu
+          pip install torch==${{ matrix.version.torch }} --extra-index-url https://download.pytorch.org/whl/cpu
           pip install .
       - name: Run tests
         run: pytest tests
diff --git a/pyproject.toml b/pyproject.toml
index 657f51f..bed81ae 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@ keywords = [
   "deep learning",
 ]
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 
 [project.optional-dependencies]
 dev = [
diff --git a/tests/conftest.py b/tests/conftest.py
index 6cccc9e..f88303e 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -4,9 +4,36 @@
 import torch
 
 
+def pytest_addoption(parser):
+    parser.addoption("--device", type=str, default="cpu")
+    parser.addoption("--dtype", type=str, default="float64")
+
+
+@pytest.fixture(autouse=True, scope="module")
+def torch_device(pytestconfig):
+    device = pytestconfig.getoption("device")
+
+    if device == "cpu":
+        yield
+    else:
+        try:
+            yield torch.set_default_device(device)
+        finally:
+            torch.set_default_device("cpu")
+
+
 @pytest.fixture(autouse=True, scope="module")
-def torch_float64():
+def torch_dtype(pytestconfig):
+    dtype = pytestconfig.getoption("dtype")
+
+    if dtype == "float32":
+        dtype = torch.float32
+    elif dtype == "float64":
+        dtype = torch.float64
+    else:
+        raise NotImplementedError()
+
     try:
-        yield torch.set_default_dtype(torch.float64)
+        yield torch.set_default_dtype(dtype)
     finally:
         torch.set_default_dtype(torch.float32)