diff --git a/Lib/test/support.py b/Lib/test/support.py
index 6749a51..3ff1df5 100644
--- a/Lib/test/support.py
+++ b/Lib/test/support.py
@@ -1593,7 +1593,7 @@
     This will typically be run on the result of the communicate() method
     of a subprocess.Popen object.
     """
-    stderr = re.sub(br"\[\d+ refs\]\r?\n?$", b"", stderr).strip()
+    stderr = re.sub(br"\[\d+ refs\]\r?\n?", b"", stderr).strip()
     return stderr
 
 def args_from_interpreter_flags():
diff --git a/Lib/test/test_multiprocessing.py b/Lib/test/test_multiprocessing.py
index 65e7b0b..e4ad904 100644
--- a/Lib/test/test_multiprocessing.py
+++ b/Lib/test/test_multiprocessing.py
@@ -1564,6 +1564,11 @@
 
         manager.shutdown()
 
+        # If the manager process exited cleanly then the exitcode
+        # will be zero.  Otherwise (after a short timeout)
+        # terminate() is used, resulting in an exitcode of -SIGTERM.
+        self.assertEqual(manager._process.exitcode, 0)
+
 #
 # Test of connecting to a remote server and using xmlrpclib for serialization
 #