June 2026 monthly summary for google/bumble: Reliability hardening and test stability improvements across the L2CAP stack and test suite. Key fixes focus on disconnection teardown in LeCreditBasedChannel and L2CAP to prevent teardown hangs during collision or abort scenarios, with proper transition to DISCONNECTED and resolution of the disconnection_result future. Also addressed pytest 9.1 compatibility to improve CI reliability. Key achievements highlighted below reflect the delivered code changes and their business value: - Improvements to disconnection handling in L2CAP/LeCreditBasedChannel, with new tests for concurrent disconnections and abort scenarios (commits: 3a7dcd1377f7fc4faa7b38d9c08b36b1adf361c6; 8a3c8c735e980458a8e8412ac53656b4082ee3e8). - Simplified abort and disconnection response handling, backed by unit tests (commit: 8a3c8c735e980458a8e8412ac53656b4082ee3e8). - Test suite compatibility improvements for pytest 9.1, including removal of trailing commas in parametric tests and enabling asyncio_mode auto (commit: 3c8fe5637d11bb0522cadec933fcaf01a50ee1b9). - Overall impact: reduced teardown hangs, more robust channel lifecycle, and improved CI stability enabling faster validation and release readiness for the Bluetooth stack. Technologies/skills demonstrated: L2CAP signaling and teardown, async lifecycle management, unit testing, pytest compatibility, Python-based test engineering, and CI reliability improvements.