Complete pytest configuration for test suite standardization

README.md

@@ -118,6 +118,9 @@ pip install pytest pytest-mock pytest-xdist
 
 # Run all tests
 pytest tests/
+
+# Pytest configuration is in pyproject.toml with sensible defaults
+# Tests are verbose by default (-v) with strict marker/config enforcement
 ```
 
 **Parallel test execution (recommended):**

pyproject.toml

@@ -15,3 +15,17 @@ dev = [
     "pytest-mock>=3.10.0",
     "pytest-xdist>=3.0.0",
 ]
+
+[tool.pytest.ini_options]
+testpaths = ["tests"]
+python_files = ["test_*.py"]
+python_classes = ["Test*"]
+python_functions = ["test_*"]
+addopts = [
+    "-v",
+    "--strict-markers",
+    "--strict-config",
+]
+markers = [
+    "slow: marks tests as slow (deselect with '-m \"not slow\"')",
+]