diff --git a/local_code_assistant/tests/conftest.py b/local_code_assistant/tests/conftest.py
new file mode 100644
index 0000000..af4cd10
--- /dev/null
+++ b/local_code_assistant/tests/conftest.py
@@ -0,0 +1,57 @@
+"""Configuration for Local Code Assistant tests."""
+
+import pytest
+from click.testing import CliRunner
+
+
+@pytest.fixture
+def cli_runner():
+    """Create a CLI runner for testing."""
+    return CliRunner()
+
+
+@pytest.fixture
+def mock_config():
+    """Create a mock configuration."""
+    class MockConfig:
+        ollama_base_url = "http://localhost:11434"
+        ollama_model = "codellama"
+        ollama_timeout = 8000
+        streaming = True
+        default_language = "python"
+        temperature = 0.2
+        max_tokens = 4000
+        syntax_highlighting = True
+        clipboard_enabled = True
+
+    return MockConfig()
+
+
+@pytest.fixture
+def sample_code():
+    """Provide sample code for testing."""
+    return '''
+def calculate_fibonacci(n: int) -> list[int]:
+    """Calculate Fibonacci sequence up to n.
+
+    Args:
+        n: The number of Fibonacci numbers to generate.
+
+    Returns:
+        List of Fibonacci numbers.
+    """
+    if n <= 0:
+        return []
+    if n == 1:
+        return [0]
+
+    fib = [0, 1]
+    for i in range(2, n):
+        fib.append(fib[i-1] + fib[i-2])
+
+    return fib
+
+
+if __name__ == "__main__":
+    print(calculate_fibonacci(10))
+'''
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