fix rounding

Author: xrmx

opentelemetry-sdk/tests/trace/export/test_export.py

@@ -483,7 +483,7 @@ def test_batch_span_processor_scheduled_delay(self):
         export_time = time.time()
         self.assertEqual(len(spans_names_list), 1)
         # call round to avoid flaky tests on pypy with delays ending some microseconds earlier
-        self.assertGreaterEqual(round(export_time - start_time) * 1e3, 500)
+        self.assertGreaterEqual(round((export_time - start_time) * 1e3), 500)
 
         span_processor.shutdown()