diff --git a/.github/workflows/integration.yml b/.github/workflows/integration.yml
index ac090166..e32dd520 100644
--- a/.github/workflows/integration.yml
+++ b/.github/workflows/integration.yml
@@ -50,13 +50,17 @@ jobs:
       if: matrix.cffi == 'yes'
       run: pip install cffi
 
-    - name: Install dependencies
+    - name: Install dependencies (testing only)
+      run: |
+        pip install pycryptodome-test-vectors
+
+    - name: Install package
       run: |
-        pip install pycryptodome-test-vectors setuptools
+        pip install .
 
     - name: Test
       run: |
-        python setup.py test
+        python -m Crypto.SelfTest
 
   build_python_27:
     # GitHub Actions will not setup Python 2.7 since June 2023
@@ -101,13 +105,17 @@ jobs:
       if: matrix.cffi == 'yes'
       run: python -m pip install cffi
 
-    - name: Install dependencies
+    - name: Install dependencies (testing only)
       run: |
         python -m pip install pycryptodome-test-vectors
 
+    - name: Install package
+      run: |
+        python -m pip install .
+
     - name: Test
       run: |
-        python -bb setup.py test
+        python -m Crypto.SelfTest
 
   mypy:
     runs-on: ubuntu-latest
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 00000000..fed528d4
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
diff --git a/setup.py b/setup.py
index 7b94fb05..3fab4dff 100644
--- a/setup.py
+++ b/setup.py
@@ -37,6 +37,8 @@
 import shutil
 import struct
 
+sys.path.append(os.getcwd())
+
 from compiler_opt import set_compiler_options