diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 0033319..86fc5b5 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -1,4 +1,5 @@
-name: tests
+name: Run tests
+
 
 on:
   push:
@@ -9,8 +10,8 @@ on:
 
 
 jobs:
-
   run_tests:
+
     strategy:
       matrix:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
@@ -20,16 +21,20 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
+
       - name: "📦 set up 🐍 ${{ matrix.python-version }}"
         uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
           cache: 'pip'
           cache-dependency-path: pyproject.toml
+
       - name: "📦 ensure latest 🐍 pip"
         run: python -m pip install --upgrade pip
+
       - name: "📦 ensure 🐍 wheel"
         run: pip install wheel
+
       - name: "📦 install flask-rest-jsonoapi-next"
         run: pip install .[tests]
 
@@ -43,12 +48,21 @@ jobs:
       - name: "run tests with coverage 🔹 🐍 3.9"
         if: ${{ matrix.python-version == '3.9'}}
         run: coverage run -m pytest
+
+      - name: "coverage report 🔹 🐍 3.9"
+        if: ${{ matrix.python-version == '3.9'}}
+        run: coverage report
+
       - name: "generate coverage xml 🔹 🐍 3.9"
         if: ${{ matrix.python-version == '3.9'}}
-        run: coverage xml
+        run: coverage xml -i
+
       - name: "generate coverage report 🔹 🐍 3.9"
         if: ${{ matrix.python-version == '3.9'}}
         run: coverage report
+
       - name: "upload coverage to codecov.io 🔹 🐍 3.9"
         if: ${{ matrix.python-version == '3.9'}}
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v3.1.4
+        with:
+          file: ./coverage.xml
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 35e51a6..704f883 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -5,9 +5,9 @@
 version: 2
 
 build:
-  os: ubuntu-20.04
+  os: ubuntu-22.04
   tools:
-    python: "3.9"
+    python: "3.11"
 
 python:
   install:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2dfa91c..979dbee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # CHANGELOG
 
+## 0.4.0 (unreleased)
+
 ## 0.34.7 (fork-0.34.7) (2023-06-28)
 
 - fix: missing import
diff --git a/pyproject.toml b/pyproject.toml
index 7caf7fc..9f3e8f0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,6 @@
 # setuptools v64 was first to support `pip install -e` for packages defined using
 # pyproject.toml (older versions support this, but only for setup.py projects)
 requires = ["setuptools>=64", "wheel"]
-build-backend = "setuptools.build_meta"
 
 [project]
 name = "flask-rest-jsonapi-next"
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 1abbd06..0000000
--- a/setup.py
+++ /dev/null
@@ -1,4 +0,0 @@
-import setuptools
-
-if __name__ == "__main__":
-    setuptools.setup()