diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..529dce7
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,57 @@
+import pytest
+from code_privacy_shield.patterns import PatternLibrary
+from code_privacy_shield.redactor import Redactor
+from code_privacy_shield.config import Config
+
+
+@pytest.fixture
+def pattern_library():
+    return PatternLibrary()
+
+
+@pytest.fixture
+def redactor():
+    return Redactor()
+
+
+@pytest.fixture
+def config():
+    return Config()
+
+
+@pytest.fixture
+def sample_sensitive_code():
+    return '''
+import os
+import requests
+
+API_KEY = "sk-abc123def456ghi789"
+DATABASE_URL = "postgresql://user:password@localhost:5432/mydb"
+EMAIL = "developer@company.com"
+AWS_SECRET = "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY"
+
+# Environment variable access
+db_password = os.environ.get("DB_PASSWORD")
+
+# Database connection
+conn_string = "mysql://admin:secretpass@db.example.com:3306/users"
+
+# Authorization header
+headers = {"Authorization": "Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9"}
+'''
+
+
+@pytest.fixture
+def sample_clean_code():
+    return '''
+def calculate_sum(a, b):
+    """Calculate sum of two numbers."""
+    return a + b
+
+class MyClass:
+    def __init__(self, value):
+        self.value = value
+
+    def get_value(self):
+        return self.value
+'''