CORRECTED PATTERN NOW:
1. ✅ Integration test (test_module_kernel_sequential_model) - BEFORE ## 🧪 Module Testing
2. ✅ ## 🧪 Module Testing (markdown section)
3. ✅ STANDARDIZED MODULE TESTING (nbgrader cell)
4. ✅ if __name__ == '__main__' block with run_module_tests_auto
5. ✅ ## 🎯 Module Summary (immediately after, no code between)
FIXES APPLIED:
✅ Moved integration test function from AFTER testing section to BEFORE it
✅ Removed duplicate integration test function and markdown section
✅ Added integration test to the if __name__ == '__main__' block
✅ Clean STANDARDIZED MODULE TESTING structure
Module 13_kernels now follows the exact pattern