https://github.com/python/cpython/commit/352aada0385f46326684b271ed918c51786816ab
commit: 352aada0385f46326684b271ed918c51786816ab
branch: 3.14
author: Miss Islington (bot) <[email protected]>
committer: vstinner <[email protected]>
date: 2026-06-29T13:59:27Z
summary:

[3.14] gh-151096: Fix test_embed with split exec prefix (GH-151288) (#152591)

gh-151096: Fix test_embed with split exec prefix (GH-151288)
(cherry picked from commit b19839b40c771904b87ea35127f9fa1b8058597e)

Co-authored-by: Harjoth Khara <[email protected]>

files:
A Misc/NEWS.d/next/Tests/2026-06-16-05-11-38.gh-issue-151096.Kq3Lp9.rst
M Lib/test/test_embed.py

diff --git a/Lib/test/test_embed.py b/Lib/test/test_embed.py
index a4a328aa3dde244..7e5ab19d4134fc1 100644
--- a/Lib/test/test_embed.py
+++ b/Lib/test/test_embed.py
@@ -1417,7 +1417,7 @@ def module_search_paths(self, prefix=None, 
exec_prefix=None):
         if prefix is None:
             prefix = config['config']['prefix']
         if exec_prefix is None:
-            exec_prefix = config['config']['prefix']
+            exec_prefix = config['config']['exec_prefix']
         if MS_WINDOWS:
             return config['config']['module_search_paths']
         else:
@@ -1551,8 +1551,10 @@ def test_init_is_python_build_with_home(self):
             expected_paths[1 if MS_WINDOWS else 2] = os.path.normpath(
                 os.path.join(exedir, f'{f.read()}\n$'.splitlines()[0]))
         if not MS_WINDOWS:
-            # PREFIX (default) is set when running in build directory
-            prefix = exec_prefix = sys.prefix
+            # PREFIX and EXEC_PREFIX (defaults) are set when running in the
+            # build directory and may differ with --exec-prefix (gh-151096).
+            prefix = sys.prefix
+            exec_prefix = sys.exec_prefix
             # stdlib calculation (/Lib) is not yet supported
             expected_paths[0] = self.module_search_paths(prefix=prefix)[0]
             config.update(prefix=prefix, base_prefix=prefix,
diff --git 
a/Misc/NEWS.d/next/Tests/2026-06-16-05-11-38.gh-issue-151096.Kq3Lp9.rst 
b/Misc/NEWS.d/next/Tests/2026-06-16-05-11-38.gh-issue-151096.Kq3Lp9.rst
new file mode 100644
index 000000000000000..3251c6fb094723b
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2026-06-16-05-11-38.gh-issue-151096.Kq3Lp9.rst
@@ -0,0 +1,2 @@
+Fix ``test_embed`` failing when CPython is configured with a split exec prefix
+(``--exec-prefix`` differing from ``--prefix``).

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