diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index a913cf55..3fed3cdb 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -51,8 +51,8 @@ jobs:
       - uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python }}
-      - name: Install tox
-        run: pip install tox
+      - name: Build
+        run: make
       - name: Run tests
-        run: tox -e ${{ matrix.python }}
+        run: make check
         timeout-minutes: 5
diff --git a/setup.cfg b/setup.cfg
index 04328554..7df0a041 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -20,3 +20,8 @@ libraries=
 
 [metadata]
 license_file = LICENSE
+
+[flake8]
+max-line-length = 85
+ignore = E128, W503, E741
+exclude = build, doc, tests/dbapi20.py
diff --git a/tox.ini b/tox.ini
deleted file mode 100644
index 8bb56694..00000000
--- a/tox.ini
+++ /dev/null
@@ -1,12 +0,0 @@
-[tox]
-envlist = {3.6,3.7,3.8,3.9,3.10}
-
-[testenv]
-commands = make check
-whitelist_externals = make
-passenv = PG* PSYCOPG2_TEST*
-
-[flake8]
-max-line-length = 85
-ignore = E128, W503, E741
-exclude = build, doc, tests/dbapi20.py