diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index f72943a9..95aaa0a9 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -1,44 +1,55 @@
 name: Tests
 on: push
 jobs:
+  code-style:
+    name: Code style
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
+      with:
+        python-version: 3.8
+        cache: 'pip'
+    - run: pip install -r requirements.txt
+    - name: Check
+      run: black . --check
+
   duplicates:
     name: No duplicate domains in list
     runs-on: ubuntu-latest
-    continue-on-error: true
     steps:
-    - uses: actions/checkout@v2
-      name: Python setup
-    - uses: actions/setup-python@v2
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: 3.8
-    - name: Install pytest
-      run: pip install pytest
+        cache: 'pip'
+    - run: pip install -r requirements.txt
     - name: Check for duplicate lines
       run: |
         cd scripts
         python3 tests.py --type duplicates
+
   regex:
     name: No regex domains in list
     runs-on: ubuntu-latest
-    continue-on-error: true
     steps:
-    - uses: actions/checkout@v2
-      name: Python setup
-    - uses: actions/setup-python@v2
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: 3.8
-    - name: Install pytest
-      run: pip install pytest
+        cache: 'pip'
+    - run: pip install -r requirements.txt
     - name: Check if list includes regex domains
       run: |
         cd scripts
         python3 tests.py --type regex
+
   unbound:
     name: Check Unbound list
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Install Unbound
       run: sudo apt-get update && sudo apt-get install -y unbound
     - name: Check unbound list
-      run: unbound-checkconf unbound.conf
\ No newline at end of file
+      run: unbound-checkconf unbound.conf
diff --git a/Makefile b/Makefile
index 3f22ae18..d6d47e49 100644
--- a/Makefile
+++ b/Makefile
@@ -16,4 +16,10 @@ whois: ## Check all domains with whois
 	@. .venv/bin/activate; cd scripts && python domain-check-api.py
 
 dnscheck: ## Check all domains if they have a response
-	@. .venv/bin/activate; cd scripts && python dnscheck.py
\ No newline at end of file
+	@. .venv/bin/activate; cd scripts && python dnscheck.py
+
+codestyle-check: ## Check all Python scripts code style
+	@. .venv/bin/activate; black . --check
+
+codestyle-fix: ## Fix all Python scripts code style
+	@. .venv/bin/activate; black .
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 5079df26..36ccab83 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,4 @@
+black==24.8.0
 python-whois==0.9.4
-dnspython==2.6.1
\ No newline at end of file
+dnspython==2.6.1
+pytest==8.3.2
\ No newline at end of file