diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
new file mode 100644
index 0000000..dd3c009
--- /dev/null
+++ b/.github/workflows/codeql-analysis.yml
@@ -0,0 +1,46 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [master]
+  schedule:
+    - cron: "16 17 * * 3"
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: ["python"]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v1
+        with:
+          languages: ${{ matrix.language }}
+
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v1
+
+      # ℹ️ Command-line programs to run using the OS shell.
+      # 📚 https://git.io/JvXDl
+
+      # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+      #    and modify them (or add more) to build your code if your project
+      #    uses a compiled language
+
+      - run: |
+        make install
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v1
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..97d1f94
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,50 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [macos-latest, ubuntu-latest, windows-latest]
+        python: [3.9, "3.10"]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python }}
+      - name: Install dependencies
+        run: |
+          pip install -q --upgrade pip
+          pip install -q --upgrade codecov coverage black flake8 codacy-coverage
+      - name: Build and install
+        run: |
+          cd FImdlp
+          make install
+      - name: Lint
+        run: |
+          black --check --diff src
+          flake8 --count src
+      - name: Tests
+        run: |
+          coverage run -m unittest discover -v - s src
+          coverage xml
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: ./coverage.xml
+      - name: Run codacy-coverage-reporter
+        if: runner.os == 'Linux'
+        uses: codacy/codacy-coverage-reporter-action@master
+        with:
+          project-token: ${{ secrets.CODACY_PROJECT_TOKEN }}
+          coverage-reports: coverage.xml
diff --git a/Makefile b/Makefile
index de439c7..1b937e5 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,9 @@
 SHELL := /bin/bash
 .DEFAULT_GOAL := help
-.PHONY: coverage deps help lint push test doc build
+.PHONY: coverage deps help lint push test build install audit
 
 clean: ## Clean up
-	rm -rf build dist *.egg-info
+	rm -rf build dist src/*.egg-info
 	if [ -f src/fimdlp/cfimdlp.cpp ]; then rm src/fimdlp/cfimdlp.cpp; fi;
 	for file in src/fimdlp/*.so; do \
 		if [ -f $${file} ]; then rm $${file}; fi; \
diff --git a/pyproject.toml b/pyproject.toml
index 99c97fb..2c9a17e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,6 @@ classifiers = [
     "Operating System :: OS Independent",
     "Programming Language :: Python",
     "Programming Language :: Python",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
 ]
diff --git a/src/fimdlp/tests/FImdlp_test.py b/src/fimdlp/tests/FImdlp_test.py
index 9e681e6..73cb564 100644
--- a/src/fimdlp/tests/FImdlp_test.py
+++ b/src/fimdlp/tests/FImdlp_test.py
@@ -74,6 +74,18 @@ class FImdlpTest(unittest.TestCase):
             clf.fit([[1, 2], [3, 4]], [1, 2], features=["a", "b", "c"])
         with self.assertRaises(ValueError):
             clf.fit([[1, 2], [3, 4]], [1, 2], unexpected="class_name")
+        with self.assertRaises(ValueError):
+            clf.fit([[1, 2], [3, 4]], [1, 2], features="01")
+        with self.assertRaises(ValueError):
+            clf.fit([[1, 2], [3, 4]], [1, 2], features=[0, 0])
+        with self.assertRaises(ValueError):
+            clf.fit([[1, 2], [3, 4]], [1, 2], features=[0, 2])
+
+    def test_fit_features(self):
+        clf = FImdlp()
+        clf.fit([[1, 2], [3, 4]], [1, 2], features=[0])
+        res = clf.transform([[1, 2], [3, 4]])
+        self.assertListEqual(res.tolist(), [[0, 2], [0, 4]])
 
     def test_transform_original(self):
         clf = FImdlp(proposal=False)