Dont' require _testcapi for test_monitoring.py

Author: ShaharNaveh

Lib/test/test_monitoring.py

@@ -14,7 +14,6 @@
 import test.support
 from test.support import import_helper, requires_specialization, script_helper
 
-_testcapi = import_helper.import_module("_testcapi")
 _testinternalcapi = import_helper.import_module("_testinternalcapi")
 
 PAIR = (0,1)
@@ -2579,21 +2578,22 @@ def test_monitoring_live_at_shutdown(self):
 
 
 class TestCApiEventGeneration(MonitoringTestBase, unittest.TestCase):
+    _testcapi = import_helper.import_module("_testcapi")
 
     class Scope:
         def __init__(self, *args):
             self.args = args
 
         def __enter__(self):
-            _testcapi.monitoring_enter_scope(*self.args)
+            self._testcapi.monitoring_enter_scope(*self.args)
 
         def __exit__(self, *args):
-            _testcapi.monitoring_exit_scope()
+            self._testcapi.monitoring_exit_scope()
 
     def setUp(self):
         super(TestCApiEventGeneration, self).setUp()
 
-        capi = _testcapi
+        capi = self._testcapi
 
         self.codelike = capi.CodeLike(2)