diff --git a/Lib/test/regrtest.py b/Lib/test/regrtest.py
index dd61b0513..46a74fe27 100755
--- a/Lib/test/regrtest.py
+++ b/Lib/test/regrtest.py
@@ -8,9 +8,9 @@ Run this script with -h or --help for documentation.
 
 import os
 import sys
-
 from test.libregrtest.main import main
 
+
 # Alias for backward compatibility (just in case)
 main_in_temp_cwd = main
 
diff --git a/Lib/unittest/mock.py b/Lib/unittest/mock.py
index 92b81d158..5a8fccf59 100644
--- a/Lib/unittest/mock.py
+++ b/Lib/unittest/mock.py
@@ -3121,6 +3121,10 @@ class ThreadingMixin(Base):
 
         return ret_value
 
+    def _increment_mock_call(self, /, *args, **kwargs):
+        with self._mock_calls_events_lock:
+            super()._increment_mock_call(*args, **kwargs)
+
     def wait_until_called(self, *, timeout=_timeout_unset):
         """Wait until the mock object is called.