diff --git a/pyproject.toml b/pyproject.toml
index 2adfd6a..2507222 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,6 +50,20 @@ dependencies = [
 [project.urls]
 Homepage = "https://github.com/valohai/django-allauth-2fa"
 
+[project.optional-dependencies]
+test = [
+    "pytest-cov==4.1.0",
+    "pytest-django==4.5.2",
+]
+docs = [
+    "Sphinx==1.6.5",
+    "sphinx-autobuild==0.7.1",   # To auto-build docs as they're edited.
+    "sphinx-rtd-theme==0.2.4",   # The Read the Docs theme for Sphinx.
+]
+
+[tool.hatch.envs.default]
+features = ["test"]
+
 [tool.hatch.version]
 path = "allauth_2fa/__init__.py"
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
deleted file mode 100644
index 5b9dc7d..0000000
--- a/requirements-dev.txt
+++ /dev/null
@@ -1,15 +0,0 @@
-# Dependencies required for installing the package are defined in setup.cfg.
-# Dependencies for tests are in requirements-test.txt.
-
--e .  # Install the current directory as an editable package.
-
-# Nice for development.
-django-extensions==2.2.6
-ipdb==0.12.3
-ipython==8.10.0
-Werkzeug==2.2.3
-
-# For documentation.
-Sphinx==1.6.5
-sphinx-autobuild==0.7.1   # To auto-build docs as they're edited.
-sphinx-rtd-theme==0.2.4   # The Read the Docs theme for Sphinx.
diff --git a/requirements-test.txt b/requirements-test.txt
deleted file mode 100644
index 6a246a3..0000000
--- a/requirements-test.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-pytest-cov
-pytest-django~=4.5.2
diff --git a/tox.ini b/tox.ini
index 4651395..a0d125f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -25,7 +25,7 @@ python =
 commands =
     pytest --cov . --cov-report html --cov-report term-missing --cov-report xml:{envdir}/coverage-{envname}.xml
 deps =
-    -r requirements-test.txt
+    .[test]
     django41: Django>=4.1,<4.2
     django42: Django>=4.2,<4.3
     djangomain: https://codeload.github.com/django/django/zip/main