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Title: [v1.x] Backport transport test deflakes from main (tests-only) by maxisbey · Pull Request #2837 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: [v1.x] Backport transport test deflakes from main (tests-only) by maxisbey · Pull Request #2837 · modelcontextprotocol/python-sdk

X Title: [v1.x] Backport transport test deflakes from main (tests-only) by maxisbey · Pull Request #2837 · modelcontextprotocol/python-sdk

Description: The official Python SDK for Model Context Protocol servers and clients - [v1.x] Backport transport test deflakes from main (tests-only) by maxisbey · Pull Request #2837 · modelcontextprotocol/python-sdk

Open Graph Description: Backports the transport test deflaking work from main (#2764, #2765, #2767, #2788) to v1.x. Tests-only: the diff touches nothing under src/. Stacked on #2717 (maxisbey/v1x-interaction-backport), wh...

X Description: Backports the transport test deflaking work from main (#2764, #2765, #2767, #2788) to v1.x. Tests-only: the diff touches nothing under src/. Stacked on #2717 (maxisbey/v1x-interaction-backport), wh...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2837

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og:image:altBackports the transport test deflaking work from main (#2764, #2765, #2767, #2788) to v1.x. Tests-only: the diff touches nothing under src/. Stacked on #2717 (maxisbey/v1x-interaction-backport), wh...
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[v1.x] Backport transport test deflakes from main (tests-only)https://github.com/modelcontextprotocol/python-sdk/pull/2837#top
maxisbeyhttps://github.com/maxisbey
maxisbey/v1x-interaction-backporthttps://github.com/modelcontextprotocol/python-sdk/tree/maxisbey/v1x-interaction-backport
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Jun 11, 2026https://github.com/modelcontextprotocol/python-sdk/pull/2837#issue-4641651751
#2764https://github.com/modelcontextprotocol/python-sdk/pull/2764
#2765https://github.com/modelcontextprotocol/python-sdk/pull/2765
#2767https://github.com/modelcontextprotocol/python-sdk/pull/2767
#2788https://github.com/modelcontextprotocol/python-sdk/pull/2788
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#2788https://github.com/modelcontextprotocol/python-sdk/pull/2788
#2717https://github.com/modelcontextprotocol/python-sdk/pull/2717
Run StreamableHTTP transport tests in process instead of over sockets #2767https://github.com/modelcontextprotocol/python-sdk/pull/2767
fix: accept wildcard media types in Accept header per RFC 7231 #2152https://github.com/modelcontextprotocol/python-sdk/pull/2152
Bad interaction between asyncio task cancellation and trace functions (only 3.11) python/cpython#106749https://github.com/python/cpython/issues/106749
MCP Documentationhttps://modelcontextprotocol.io
#2717https://github.com/modelcontextprotocol/python-sdk/pull/2717
#2717https://github.com/modelcontextprotocol/python-sdk/pull/2717
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Please reload this pagehttps://github.com/modelcontextprotocol/python-sdk/pull/2837
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June 11, 2026 14:52https://github.com/modelcontextprotocol/python-sdk/pull/2837#commits-pushed-b880950
https://github.com/maxisbey
Deflake the session-level timeout test with trio's virtual clock (https://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/b880950a26ca758a2a9830a27ec63d8935a58ea6
#2788https://github.com/modelcontextprotocol/python-sdk/pull/2788
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tests: re-export StreamingASGITransport as the sanctioned bridge impo…https://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/8d7389602750dbfcb4a3cd8bc16c7b6b54598c4a
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Run transport security tests in process instead of over sockets (https://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/6a6e7b7276bde130c3bf7825890e1221a0e08075
#2764https://github.com/modelcontextprotocol/python-sdk/pull/2764
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Filter known anyio stream teardown warnings in streamable HTTP securi…https://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/fd71a106b16a90eff78ed3471ce2b1c8936dd9ac
fd71a10https://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/fd71a106b16a90eff78ed3471ce2b1c8936dd9ac
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Run SSE and Unicode transport tests in process instead of over sockets (https://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/92c4fe063859d2cbd75e96fe79fa5bd9e66ae171
92c4fe0https://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/92c4fe063859d2cbd75e96fe79fa5bd9e66ae171
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Guard in-process HTTP tests against sse-starlette's global exit eventhttps://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/a94f3d5827745c85c37fded476631e4e6a18d93d
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Run StreamableHTTP transport tests in process instead of over sockets (https://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/43cf9ec76242670fae1bb23cb1999540467ed3f1
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Force per-test GC so leaked-stream warnings stay inside the scoped fi…https://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/b80a9bd7c60517d240c133b6e0190ca7ad22567e
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Extend the per-test GC fixture to the SSE and Unicode HTTP test moduleshttps://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/600c96e3f983362cb06ae45ea8e37baa6a543789
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Harden the streaming ASGI bridge against trailing responseshttps://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/39938a2f8a784551221f807cef46caf6e29d60c0
39938a2https://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/39938a2f8a784551221f807cef46caf6e29d60c0
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Verify SSE request-context isolation inside each connection blockhttps://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/b732867ccfabb20fd870a173831934930498c268
b732867https://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/b732867ccfabb20fd870a173831934930498c268
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Exclude the connection loop's exit arc from branch coveragehttps://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/3e53636d7608b3e685dd3a5798a3393031c94436
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Exclude post-teardown header checks from 3.11 coverage measurementhttps://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/16ceeea3a98a104634e2e22c7afaf74ff312727d
16ceeeahttps://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/16ceeea3a98a104634e2e22c7afaf74ff312727d
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June 11, 2026 15:02https://github.com/modelcontextprotocol/python-sdk/pull/2837#event-26632201029
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June 11, 2026 15:56https://github.com/modelcontextprotocol/python-sdk/pull/2837#commits-pushed-e155e1b
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Deflake child process cleanup tests with polling instead of fixed sleepshttps://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/e155e1bb9e304f6b77078e5851884e1ca8be6cda
e155e1bhttps://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/e155e1bb9e304f6b77078e5851884e1ca8be6cda
https://github.com/maxisbey
Harden stop detection and avoid redundant tree termination in cleanup…https://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/4a17006005d42aa1eb5bccb345bd92d0bee49f76
4a17006https://github.com/modelcontextprotocol/python-sdk/pull/2837/commits/4a17006005d42aa1eb5bccb345bd92d0bee49f76
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June 11, 2026 16:15https://github.com/modelcontextprotocol/python-sdk/pull/2837#event-26635472027
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Jun 11, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2837#ref-pullrequest-4642447863
[v1.x] Deflake the child process cleanup tests #2839 https://github.com/modelcontextprotocol/python-sdk/pull/2839
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