diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d65acf9e6..fecd97885 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -67,5 +67,5 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: Run tests
         run: |
-          pip install ".[test]"
-          tox
+          pip install ".[unit-test]"
+          make test-unit
diff --git a/AGENTS.md b/AGENTS.md
index 8cc3170c5..20f924d80 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -3,8 +3,7 @@
 ## Source of Truth
 
 - This is the official synchronous Python SDK for the Linode API. Supported
-  Python versions come from [pyproject.toml](pyproject.toml) (`>=3.10`); do not
-  infer support from the older environment names still present in [tox.ini](tox.ini).
+  Python versions come from [pyproject.toml](pyproject.toml) (`>=3.10`).
 - Make changes only in canonical source trees such as `linode_api4/`, `test/`,
   `docs/`, `examples/`, and `.github/`. Do not edit generated copies or output in
   `build/`, `dist/`, `docs/build/`, `docs/_build/`, or `linode_api4.egg-info/`.
diff --git a/README.rst b/README.rst
index 5615bb488..3f7f00a30 100644
--- a/README.rst
+++ b/README.rst
@@ -102,14 +102,13 @@ Tests
 -----
 
 Tests live in the ``test`` directory.  When invoking tests, make sure you are
-in the root directory of this project.  To run the full suite across all
-supported python versions, use tox_:
+in the root directory of this project.  Install unit-test dependencies and run
+the mocked unit suite with:
 
 .. code-block:: shell
 
-   tox
-
-Running tox also runs pylint and coverage reports.
+   python3 -m pip install -e ".[unit-test]"
+   make test-unit
 
 The test suite uses fixtures stored as JSON in ``test/fixtures``.  These files
 contain sanitized JSON responses from the API - the file name is the URL called
@@ -131,8 +130,6 @@ from the api base url that should be returned, for example::
      linode = self.client.linode.instance_create('g6-standard-2', 'us-east')
      self.assertEqual(linode.id, 123) # passes
 
-.. _tox: http://tox.readthedocs.io
-
 
 Integration Tests
 -----------------
diff --git a/pyproject.toml b/pyproject.toml
index 3b3d982b7..e4e641aa7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,32 +35,38 @@ dependencies = ["requests", "polling", "deprecated"]
 dynamic = ["version"]
 
 [project.optional-dependencies]
-test = ["tox>=4.4.0"]
-
-dev = [
-    "tox>=4.4.0",
-    "mock>=5.0.0",
+test-shared = [
     "pytest>=7.3.1",
     "httpretty>=1.1.4",
+    "pytest-rerunfailures",
+]
+unit-test = [
+    "linode_api4[test-shared]",
+    "mock>=5.0.0",
+]
+int-test = [
+    "linode_api4[test-shared]",
+    "cryptography",
+]
+lint = [
     "black>=23.1.0",
     "isort>=5.12.0",
     "autoflake>=2.0.1",
     "pylint",
     "twine>=4.0.2",
     "build>=0.10.0",
-    "Sphinx>=6.0.0",
-    "sphinx-autobuild>=2021.3.14",
-    "sphinxcontrib-fulltoc>=1.2.0",
-    "build>=0.10.0",
-    "twine>=4.0.2",
-    "pytest-rerunfailures",
 ]
-
 doc = [
     "Sphinx>=6.0.0",
     "sphinx-autobuild>=2021.3.14",
     "sphinxcontrib-fulltoc>=1.2.0",
 ]
+dev = [
+    "linode_api4[unit-test]",
+    "linode_api4[int-test]",
+    "linode_api4[lint]",
+    "linode_api4[doc]",
+]
 
 [project.urls]
 Homepage = "https://github.com/linode/linode_api4-python"
diff --git a/test/integration/conftest.py b/test/integration/conftest.py
index 6470d9df1..c5d60512e 100644
--- a/test/integration/conftest.py
+++ b/test/integration/conftest.py
@@ -2,7 +2,6 @@
 import logging
 import os
 import random
-import subprocess
 import time
 from test.integration.helpers import (
     get_test_label,
@@ -14,6 +13,8 @@
 
 import pytest
 import requests
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.primitives.asymmetric import ed25519
 from requests.exceptions import ConnectionError, RequestException
 
 from linode_api4 import (
@@ -263,17 +264,28 @@ def create_linode_for_pass_reset(test_linode_client, e2e_test_firewall):
 
 
 @pytest.fixture(scope="session")
-def ssh_key_gen(tmp_path_factory):
-    key_path = tmp_path_factory.mktemp("ssh-key-gen") / "sdk-sshkey"
-
-    subprocess.run(
-        ["ssh-keygen", "-q", "-t", "rsa", "-f", str(key_path), "-N", ""],
-        check=True,
+def ssh_key_gen():
+    key = ed25519.Ed25519PrivateKey.generate()
+
+    pub_key = (
+        key.public_key()
+        .public_bytes(
+            encoding=serialization.Encoding.OpenSSH,
+            format=serialization.PublicFormat.OpenSSH,
+        )
+        .decode()
+        .rstrip()
+    )
+    priv_key = (
+        key.private_bytes(
+            encoding=serialization.Encoding.PEM,
+            format=serialization.PrivateFormat.OpenSSH,
+            encryption_algorithm=serialization.NoEncryption(),
+        )
+        .decode()
+        .rstrip()
     )
 
-    pub_key = key_path.with_suffix(".pub").read_text().rstrip()
-    priv_key = key_path.read_text().rstrip()
-
     yield pub_key, priv_key
 
 
diff --git a/tox.ini b/tox.ini
deleted file mode 100644
index 266c26717..000000000
--- a/tox.ini
+++ /dev/null
@@ -1,17 +0,0 @@
-[tox]
-envlist = py38,py39,py310,py311,py312
-skip_missing_interpreters = true
-
-[testenv]
-deps = 
-    pytest
-    coverage
-    mock
-    pylint
-    httpretty
-    pytest-rerunfailures
-commands =
-    python -m pip install .
-    coverage run --source linode_api4 -m pytest test/unit
-    coverage report
-    pylint linode_api4