test: fix flaky threading test (#5700)

Author: sl0thentr0py

.claude/settings.json

@@ -29,6 +29,7 @@
       "Bash(grep:*)",
       "Bash(mv:*)",
       "Bash(source .venv/bin/activate)",
+      "Bash(source tox.venv/bin/activate:*)",
       "Bash(tox:*)",
       "Bash(tox.venv/bin/tox:*)",
       "Bash(.tox/*/bin/python:*)",

tests/test_utils.py

@@ -7,7 +7,6 @@
 import pytest
 
 import sentry_sdk
-from sentry_sdk._compat import PY38
 from sentry_sdk.integrations import Integration
 from sentry_sdk._queue import Queue
 from sentry_sdk.utils import (
@@ -942,14 +941,12 @@ def target():
     assert (main_thread.ident, main_thread.name) == results.get(timeout=1)
 
 
-@pytest.mark.skipif(PY38, reason="Flakes a lot on 3.8 in CI.")
 def test_get_current_thread_meta_failed_to_get_main_thread():
     results = Queue(maxsize=1)
 
     def target():
-        with mock.patch("threading.current_thread", side_effect=["fake thread"]):
-            with mock.patch("threading.current_thread", side_effect=["fake thread"]):
-                results.put(get_current_thread_meta())
+        with mock.patch("threading.current_thread", return_value="fake thread"):
+            results.put(get_current_thread_meta())
 
     main_thread = threading.main_thread()