diff --git a/Lib/test/test_threadsignals.py b/Lib/test/test_threadsignals.py
index 1f10fe7..286c2e4 100644
--- a/Lib/test/test_threadsignals.py
+++ b/Lib/test/test_threadsignals.py
@@ -14,7 +14,7 @@
 signalled_all=thread.allocate_lock()
 
 
-def registerSignals((for_usr1, for_usr2, for_alrm)):
+def registerSignals(for_usr1, for_usr2, for_alrm):
     usr1 = signal.signal(signal.SIGUSR1, for_usr1)
     usr2 = signal.signal(signal.SIGUSR2, for_usr2)
     alrm = signal.signal(signal.SIGALRM, for_alrm)
@@ -74,11 +74,11 @@
                           signal.SIGUSR2 : {'tripped': 0, 'tripped_by': 0 },
                           signal.SIGALRM : {'tripped': 0, 'tripped_by': 0 } }
 
-    oldsigs = registerSignals((handle_signals, handle_signals, handle_signals))
+    oldsigs = registerSignals(handle_signals, handle_signals, handle_signals)
     try:
         run_unittest(ThreadSignals)
     finally:
-        registerSignals(oldsigs)
+        registerSignals(*oldsigs)
 
 if __name__ == '__main__':
     test_main()