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python · kumaraditya303 · Dec 15, 2025 · Dec 13, 2025 · Dec 13, 2025 · Dec 13, 2025
commit d532d23633eeea55eb5ead7db88c51a1d1ab9fc3
diff --git a/Misc/NEWS.d/next/Library/2025-12-13-06-17-44.gh-issue-142651.ZRtBu4.rst b/Misc/NEWS.d/next/Library/2025-12-13-06-17-44.gh-issue-142651.ZRtBu4.rst
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+Fixed a thread safety issue in :mod:`unittest.mock` where :attr:`~unittest.mock.Mock.call_count` could return inaccurate values when a mock was called concurrently from multiple threads. The attribute now derives its value from the length of :attr:`~unittest.mock.Mock.call_args_list` to ensure consistency.
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		Fixed a thread safety issue in :mod:`unittest.mock` where :attr:`~unittest.mock.Mock.call_count` could return inaccurate values when a mock was called concurrently from multiple threads. The attribute now derives its value from the length of :attr:`~unittest.mock.Mock.call_args_list` to ensure consistency.
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