One last attempt with a forced delay

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

@@ -21,8 +21,10 @@
 from logging import WARNING
 from platform import python_implementation, system
 from unittest import mock
+from time import sleep
 
 from pytest import mark
+from flaky import flaky
 
 from opentelemetry import trace as trace_api
 from opentelemetry.context import Context
@@ -461,12 +463,10 @@ def _target():
 
         span_processor.shutdown()
 
-    @mark.skipif(
-        python_implementation() == "PyPy" or system() == "Windows",
-        reason="This test randomly fails with huge delta in Windows with PyPy",
-    )
+    @flaky(max_runs=3)
     def test_batch_span_processor_scheduled_delay(self):
         """Test that spans are exported each schedule_delay_millis"""
+        sleep(1)
         spans_names_list = []
 
         export_event = threading.Event()