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Title: tests: avoid racy HTTP test ports by tarunag10 · Pull Request #2760 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: tests: avoid racy HTTP test ports by tarunag10 · Pull Request #2760 · modelcontextprotocol/python-sdk

X Title: tests: avoid racy HTTP test ports by tarunag10 · Pull Request #2760 · modelcontextprotocol/python-sdk

Description: Summary Replaces racy pick-free-port-then-rebind server fixtures in the streamable HTTP/SSE test files with the existing run_uvicorn_in_thread helper. Updates affected tests to consume URLs yielded from the actual listening uvicorn socket instead of separately selected port integers. Adds a regression assertion that the basic streamable HTTP fixture URL uses a port that is already reserved, and closes the helper socket explicitly during shutdown. This is an alternative/focused fix for #2704 using the existing thread helper. I noticed #2705 is already open with a process-helper approach; this draft is opened for maintainer comparison rather than as a duplicate ready-to-merge submission. Validation uv run ruff check tests/test_helpers.py tests/shared/test_streamable_http.py tests/shared/test_sse.py tests/server/test_sse_security.py tests/server/test_streamable_http_security.py tests/client/test_http_unicode.py uv run pytest tests/shared/test_streamable_http.py tests/shared/test_sse.py tests/server/test_sse_security.py tests/server/test_streamable_http_security.py tests/client/test_http_unicode.py -> 120 passed, 1 skipped uv run pytest -n auto tests/shared/test_streamable_http.py tests/shared/test_sse.py tests/server/test_sse_security.py tests/server/test_streamable_http_security.py tests/client/test_http_unicode.py -> first run had one non-port timing failure in test_streamable_http_multiple_reconnections; isolated rerun passed; second full affected xdist run passed with 120 passed, 1 skipped

Open Graph Description: Summary Replaces racy pick-free-port-then-rebind server fixtures in the streamable HTTP/SSE test files with the existing run_uvicorn_in_thread helper. Updates affected tests to consume URLs yielde...

X Description: Summary Replaces racy pick-free-port-then-rebind server fixtures in the streamable HTTP/SSE test files with the existing run_uvicorn_in_thread helper. Updates affected tests to consume URLs yielde...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2760

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157f00d tests: avoid racy HTTP test ports tarunag10 Jun 2, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2760/commits/157f00dc6364f0a02a5f9f928c70d54e2a08ec48
35f87db style: format port-race test fixtures tarunag10 Jun 2, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2760/commits/35f87db434908bebdeb9a793102db48d1d0b480a
7f5957d test: remove obsolete server wait helper tarunag10 Jun 2, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2760/commits/7f5957d718b01763591064ce8387dcc937b554f9
9dd8080 test: remove stale no-cover pragmas tarunag10 Jun 2, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2760/commits/9dd8080f5bc41d7fbc5405ebf2cb7b4caa1e6362
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