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Title: tests: eliminate port-allocation races in SSE/StreamableHTTP tests by maxisbey · Pull Request #2264 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: tests: eliminate port-allocation races in SSE/StreamableHTTP tests by maxisbey · Pull Request #2264 · modelcontextprotocol/python-sdk

X Title: tests: eliminate port-allocation races in SSE/StreamableHTTP tests by maxisbey · Pull Request #2264 · modelcontextprotocol/python-sdk

Description: The official Python SDK for Model Context Protocol servers and clients - tests: eliminate port-allocation races in SSE/StreamableHTTP tests by maxisbey · Pull Request #2264 · modelcontextprotocol/python-sdk

Open Graph Description: Motivation and Context Fixes #1573. Several test files use the pattern socket.bind(("", 0)) → get port → start uvicorn in multiprocessing.Process → wait_for_server() → connect. This has a...

X Description: Motivation and Context Fixes #1573. Several test files use the pattern socket.bind(("", 0)) → get port → start uvicorn in multiprocessing.Process → wait_for_server() → connect. Th...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2264

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Mar 10, 2026https://github.com/modelcontextprotocol/python-sdk/pull/2264#issue-4052207982
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March 18, 2026 11:46https://github.com/modelcontextprotocol/python-sdk/pull/2264#event-23678965604
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chore: downgrade stale no-cover pragmas to lax no coverhttps://github.com/modelcontextprotocol/python-sdk/pull/2264/commits/3f81d3b9d547f9ee1d1f6c51cd40777c612291d4
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perf(tests): module-scope server fixtures, ASGI for context-aware testshttps://github.com/modelcontextprotocol/python-sdk/pull/2264/commits/ad07d3e11a6da71679a007a0da8a7dcd0ebe4b00
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fix(tests): add no-branch pragma for nested async with ClientSessionhttps://github.com/modelcontextprotocol/python-sdk/pull/2264/commits/29bdbd708d8c6d59a88af90d87b2239a80d72e6c
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fix(tests): 3.14 phantom branch arcs, Windows Proactor transport leakhttps://github.com/modelcontextprotocol/python-sdk/pull/2264/commits/4e6e9e79b5e0a1d998bfaee102f7f71fda66701d
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refactor: minimal targeted pragmas instead of blanket lax no coverhttps://github.com/modelcontextprotocol/python-sdk/pull/2264/commits/6cea4c58dac9f38559d20b1c272ac95c6f26ea3d
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chore: adopt run_uvicorn_in_thread from MAX-157, drop wait_for_serverhttps://github.com/modelcontextprotocol/python-sdk/pull/2264/commits/50a2183e468dadd65f4760f7c1652951e4cc021c
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Fix flaky test test_response in test_streamable_http.py https://github.com/modelcontextprotocol/python-sdk/issues/1573
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