diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index cae6aa2..309aa3a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -52,7 +52,7 @@ jobs:
         pip install -r requirements-test.txt
     - name: Test suite
       run: |
-        ./runtests.py
+        pytest
 
   pre-commit:
     runs-on: ubuntu-latest
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index ccdf8d5..18a6d11 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -26,7 +26,7 @@ To set up your environment to be able to work on django-mailer, do the following
 
 4. Install test requirements::
 
-    $ pip install coverage mock
+    $ pip install -r requirements-test.txt
 
 5. Create a branch for local development::
 
@@ -34,7 +34,7 @@ To set up your environment to be able to work on django-mailer, do the following
 
 6. Now you can make your changes locally. Run the tests in the virtualenv using::
 
-    $ ./runtests.py
+    $ pytest
 
    To run the tests in all supported environments, do::
 
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000..2eff0f6
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,4 @@
+[pytest]
+DJANGO_SETTINGS_MODULE = tests.settings
+#django_find_project = false
+norecursedirs = examples build dist
diff --git a/requirements-test.txt b/requirements-test.txt
index ce6b2f4..84b89d0 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,2 +1,3 @@
-mock==3.0.5;python_version<'3.6'
-mock==4.0.1;python_version>='3.6'
+pytest
+pytest-django
+pytest-cov
diff --git a/tests/settings.py b/tests/settings.py
new file mode 100644
index 0000000..6ad763d
--- /dev/null
+++ b/tests/settings.py
@@ -0,0 +1,16 @@
+INSTALLED_APPS = [
+    "django.contrib.auth",
+    "django.contrib.contenttypes",
+    "django.contrib.sites",
+    "mailer",
+]
+DATABASES = {
+    "default": {
+        "ENGINE": "django.db.backends.sqlite3",
+        "NAME": ":memory:",
+    }
+}
+
+SITE_ID = 1
+SECRET_KEY = "notasecret"
+MIDDLEWARE_CLASSES = []
diff --git a/tox.ini b/tox.ini
index 6210da1..bb328be 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,10 +17,9 @@ basepython =
     py311: python3.11
 
 commands =
-    test: coverage run ./runtests.py
+    test: pytest --cov=mailer
     checkmanifest: check-manifest
 deps =
-    coverage
     -r requirements-test.txt
     -e .
     checkmanifest: checkmanifest