diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8696719d2954..d074eb13fdbe 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -71,9 +71,7 @@ jobs:
       - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
-          python-version: "3.15"
-          allow-prereleases: true
-          check-latest: true
+          python-version: "3.14"
       - uses: astral-sh/setup-uv@v7
         with:
           version-file: "requirements-tests.txt"
diff --git a/tests/regr_test.py b/tests/regr_test.py
index 4013600e879f..3d310415061b 100755
--- a/tests/regr_test.py
+++ b/tests/regr_test.py
@@ -358,7 +358,8 @@ def cleanup_threads(
         ]
 
         with cleanup_threads(event, printer_thread, executor):
-            concurrent.futures.wait(testcase_futures)
+            for future in concurrent.futures.as_completed(testcase_futures):
+                future.result()
 
         mypy_futures = [executor.submit(task) for task in to_do]