diff --git a/.gitignore b/.gitignore
index 94487b9..0ca1887 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,71 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
 *.pyc
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# Testing
+.pytest_cache/
+.coverage
+htmlcov/
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.tox/
+.nox/
+
+# Virtual environments
+venv/
+ENV/
+env/
+.venv/
+.env
+
+# IDEs
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# Claude settings
+.claude/*
+
+# Poetry
+poetry.lock
+
+# Logs
+*.log
+
+# Local env files
+.env.local
+.env.*.local
+
+# Temporary files
+tmp/
+temp/
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..0d48a34
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,86 @@
+[tool.poetry]
+name = "redwarden"
+version = "0.1.0"
+description = "A security proxy tool for red team operations"
+authors = ["RedWarden Team"]
+readme = "README.md"
+packages = [{include = "lib"}, {include = "plugins"}]
+
+[tool.poetry.dependencies]
+python = "^3.8"
+brotli = "*"
+requests = "*"
+PyYaml = "*"
+sqlitedict = "*"
+tornado = "*"
+
+[tool.poetry.group.dev.dependencies]
+pytest = "^7.4.0"
+pytest-cov = "^4.1.0"
+pytest-mock = "^3.11.1"
+
+[tool.poetry.scripts]
+test = "pytest:main"
+tests = "pytest:main"
+
+[tool.pytest.ini_options]
+minversion = "7.0"
+addopts = [
+    "-ra",
+    "--strict-markers",
+    "--strict-config",
+    "--cov=lib",
+    "--cov=plugins",
+    "--cov-branch",
+    "--cov-report=term-missing:skip-covered",
+    "--cov-report=html:htmlcov",
+    "--cov-report=xml:coverage.xml",
+    "--cov-fail-under=0",  # Set to 0 for infrastructure setup, change to 80 when writing actual tests
+]
+testpaths = ["tests"]
+python_files = ["test_*.py", "*_test.py"]
+python_classes = ["Test*"]
+python_functions = ["test_*"]
+markers = [
+    "unit: Unit tests",
+    "integration: Integration tests",
+    "slow: Tests that take a long time to run",
+]
+
+[tool.coverage.run]
+source = ["lib", "plugins"]
+omit = [
+    "*/tests/*",
+    "*/__pycache__/*",
+    "*/migrations/*",
+    "*/.venv/*",
+    "*/venv/*",
+]
+
+[tool.coverage.report]
+precision = 2
+show_missing = true
+skip_covered = false
+exclude_lines = [
+    "pragma: no cover",
+    "def __repr__",
+    "if self\\.debug:",
+    "if settings\\.DEBUG",
+    "raise AssertionError",
+    "raise NotImplementedError",
+    "if 0:",
+    "if __name__ == .__main__.:",
+    "if TYPE_CHECKING:",
+    "class .*\\bProtocol\\):",
+    "@(abc\\.)?abstractmethod",
+]
+
+[tool.coverage.html]
+directory = "htmlcov"
+
+[tool.coverage.xml]
+output = "coverage.xml"
+
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
\ No newline at end of file
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..fa2f890
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,139 @@
+"""Shared pytest fixtures and configuration for all tests."""
+
+import os
+import sys
+import tempfile
+from pathlib import Path
+from typing import Generator, Dict, Any
+from unittest.mock import Mock, MagicMock
+
+import pytest
+import yaml
+
+# Add project root to Python path
+PROJECT_ROOT = Path(__file__).parent.parent
+sys.path.insert(0, str(PROJECT_ROOT))
+
+
+@pytest.fixture
+def temp_dir() -> Generator[Path, None, None]:
+    """Create a temporary directory for test files."""
+    with tempfile.TemporaryDirectory() as tmpdir:
+        yield Path(tmpdir)
+
+
+@pytest.fixture
+def mock_config() -> Dict[str, Any]:
+    """Provide a mock configuration dictionary."""
+    return {
+        "proxy": {
+            "host": "127.0.0.1",
+            "port": 8080,
+            "ssl": False,
+        },
+        "logging": {
+            "level": "DEBUG",
+            "file": None,
+        },
+        "plugins": {
+            "enabled": ["malleable_redirector"],
+            "config": {}
+        }
+    }
+
+
+@pytest.fixture
+def mock_yaml_config(temp_dir: Path, mock_config: Dict[str, Any]) -> Path:
+    """Create a temporary YAML config file."""
+    config_file = temp_dir / "test_config.yaml"
+    with open(config_file, 'w') as f:
+        yaml.dump(mock_config, f)
+    return config_file
+
+
+@pytest.fixture
+def mock_logger() -> Mock:
+    """Provide a mock logger object."""
+    logger = Mock()
+    logger.debug = MagicMock()
+    logger.info = MagicMock()
+    logger.warning = MagicMock()
+    logger.error = MagicMock()
+    logger.critical = MagicMock()
+    return logger
+
+
+@pytest.fixture
+def mock_request() -> Mock:
+    """Provide a mock HTTP request object."""
+    request = Mock()
+    request.method = "GET"
+    request.path = "/test"
+    request.headers = {"User-Agent": "TestAgent/1.0"}
+    request.body = b""
+    request.remote_addr = ("127.0.0.1", 12345)
+    return request
+
+
+@pytest.fixture
+def mock_response() -> Mock:
+    """Provide a mock HTTP response object."""
+    response = Mock()
+    response.status_code = 200
+    response.headers = {"Content-Type": "text/html"}
+    response.body = b"<html><body>Test</body></html>"
+    return response
+
+
+@pytest.fixture
+def mock_plugin() -> Mock:
+    """Provide a mock plugin object."""
+    plugin = Mock()
+    plugin.name = "test_plugin"
+    plugin.enabled = True
+    plugin.process_request = MagicMock(return_value=None)
+    plugin.process_response = MagicMock(return_value=None)
+    return plugin
+
+
+@pytest.fixture(autouse=True)
+def reset_environment():
+    """Reset environment variables before each test."""
+    original_env = os.environ.copy()
+    yield
+    os.environ.clear()
+    os.environ.update(original_env)
+
+
+@pytest.fixture
+def sample_malleable_profile(temp_dir: Path) -> Path:
+    """Create a sample Malleable C2 profile for testing."""
+    profile_content = """
+    set useragent "Mozilla/5.0 Test Browser";
+    
+    http-get {
+        set uri "/test.php";
+        
+        client {
+            header "Accept" "text/html";
+        }
+        
+        server {
+            header "Server" "TestServer/1.0";
+        }
+    }
+    """
+    profile_file = temp_dir / "test.profile"
+    profile_file.write_text(profile_content)
+    return profile_file
+
+
+@pytest.fixture
+def isolated_imports():
+    """Ensure imports are isolated between tests."""
+    original_modules = sys.modules.copy()
+    yield
+    # Remove any modules imported during the test
+    for module in list(sys.modules.keys()):
+        if module not in original_modules:
+            del sys.modules[module]
\ No newline at end of file
diff --git a/tests/integration/__init__.py b/tests/integration/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/test_infrastructure.py b/tests/test_infrastructure.py
new file mode 100644
index 0000000..7d21f86
--- /dev/null
+++ b/tests/test_infrastructure.py
@@ -0,0 +1,145 @@
+"""Validation tests to verify the testing infrastructure is working correctly."""
+
+import sys
+from pathlib import Path
+
+import pytest
+
+
+class TestInfrastructureSetup:
+    """Test class to validate the testing infrastructure."""
+
+    def test_pytest_is_working(self):
+        """Verify that pytest is running correctly."""
+        assert True
+
+    def test_project_imports(self):
+        """Verify that project modules can be imported."""
+        # Test importing main modules
+        import lib
+        import plugins
+        
+        assert lib is not None
+        assert plugins is not None
+
+    def test_fixtures_available(self, temp_dir, mock_config, mock_logger):
+        """Verify that custom fixtures are available and working."""
+        assert temp_dir.exists()
+        assert isinstance(mock_config, dict)
+        assert hasattr(mock_logger, 'info')
+
+    def test_coverage_is_tracked(self):
+        """Verify that coverage tracking is enabled."""
+        # This test will be included in coverage reports
+        result = 1 + 1
+        assert result == 2
+
+    @pytest.mark.unit
+    def test_unit_marker(self):
+        """Verify that the unit test marker works."""
+        assert True
+
+    @pytest.mark.integration
+    def test_integration_marker(self):
+        """Verify that the integration test marker works."""
+        assert True
+
+    @pytest.mark.slow
+    def test_slow_marker(self):
+        """Verify that the slow test marker works."""
+        import time
+        # Not actually slow for validation purposes
+        assert True
+
+    def test_temp_dir_fixture(self, temp_dir):
+        """Verify the temp_dir fixture creates a usable directory."""
+        test_file = temp_dir / "test.txt"
+        test_file.write_text("test content")
+        
+        assert test_file.exists()
+        assert test_file.read_text() == "test content"
+
+    def test_mock_yaml_config_fixture(self, mock_yaml_config):
+        """Verify the mock_yaml_config fixture creates a valid YAML file."""
+        import yaml
+        
+        assert mock_yaml_config.exists()
+        
+        with open(mock_yaml_config, 'r') as f:
+            config = yaml.safe_load(f)
+        
+        assert 'proxy' in config
+        assert config['proxy']['port'] == 8080
+
+    def test_mock_request_fixture(self, mock_request):
+        """Verify the mock_request fixture provides expected attributes."""
+        assert mock_request.method == "GET"
+        assert mock_request.path == "/test"
+        assert "User-Agent" in mock_request.headers
+
+    def test_mock_response_fixture(self, mock_response):
+        """Verify the mock_response fixture provides expected attributes."""
+        assert mock_response.status_code == 200
+        assert "Content-Type" in mock_response.headers
+        assert b"<html>" in mock_response.body
+
+    def test_environment_isolation(self):
+        """Verify that environment variables are isolated between tests."""
+        import os
+        
+        # Set a test variable
+        os.environ['TEST_VAR'] = 'test_value'
+        assert os.environ.get('TEST_VAR') == 'test_value'
+        
+        # The reset_environment fixture should clean this up after the test
+
+    def test_python_path_includes_project_root(self):
+        """Verify that the project root is in the Python path."""
+        project_root = str(Path(__file__).parent.parent)
+        assert project_root in sys.path
+
+
+class TestProjectStructure:
+    """Test class to validate the project structure is set up correctly."""
+
+    def test_test_directories_exist(self):
+        """Verify that all test directories exist."""
+        test_root = Path(__file__).parent
+        
+        assert test_root.exists()
+        assert (test_root / "unit").exists()
+        assert (test_root / "integration").exists()
+        assert (test_root / "__init__.py").exists()
+        assert (test_root / "unit" / "__init__.py").exists()
+        assert (test_root / "integration" / "__init__.py").exists()
+
+    def test_conftest_exists(self):
+        """Verify that conftest.py exists and is importable."""
+        conftest_path = Path(__file__).parent / "conftest.py"
+        assert conftest_path.exists()
+        
+        # Verify it can be imported (pytest does this automatically)
+        import tests.conftest
+        assert tests.conftest is not None
+
+    def test_pyproject_toml_exists(self):
+        """Verify that pyproject.toml exists with proper configuration."""
+        pyproject_path = Path(__file__).parent.parent / "pyproject.toml"
+        assert pyproject_path.exists()
+        
+        import tomllib
+        
+        with open(pyproject_path, 'rb') as f:
+            config = tomllib.load(f)
+        
+        # Check Poetry configuration
+        assert 'tool' in config
+        assert 'poetry' in config['tool']
+        assert 'pytest' in config['tool']
+        assert 'coverage' in config['tool']
+        
+        # Check test dependencies
+        dev_deps = config['tool']['poetry']['group']['dev']['dependencies']
+        assert 'pytest' in dev_deps
+        assert 'pytest-cov' in dev_deps
+        assert 'pytest-mock' in dev_deps
\ No newline at end of file
diff --git a/tests/unit/__init__.py b/tests/unit/__init__.py
new file mode 100644
index 0000000..e69de29