diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0db9d6f..e9ee326 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,7 +16,7 @@ jobs:
         python-version: [ "3.12", "3.13", "3.14" ]
 
     steps:
-    
+
       - uses: actions/checkout@v3
 
       - name: Set up Python ${{ matrix.python-version }}
@@ -27,7 +27,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip setuptools wheel
-          python setup.py install
+          pip install .[test]
 
       - name: Test with pytest
         run: |
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index eb7d872..13c5262 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -14,7 +14,7 @@ source env/bin/activate
 ## Install Dependencies
 ```bash
 python -m pip install --upgrade pip setuptools wheel
-python setup.py install
+pip install -e '.[test]'
 ```
 
 ## Run Tests
diff --git a/setup.py b/setup.py
index 888fedf..50365cb 100644
--- a/setup.py
+++ b/setup.py
@@ -16,6 +16,8 @@
     keywords='Luno API Bitcoin Ethereum',
     test_suite='tests',
     setup_requires=['pytest-runner'],
-    tests_require=['pytest', 'pytest-cov', 'requests_mock']
+    extras_require={
+        "test": ["pytest", "pytest-cov", "requests_mock"]
+    },
 )