add regression test

tests/contrib/asyncio/test_lazyimport.py

@@ -20,6 +20,12 @@ def test_lazy_import():
 
 @pytest.mark.subprocess()
 def test_asyncio_not_imported_by_auto_instrumentation():
+    # Module unloading is not supported for asyncio, a simple workaround
+    # is to ensure asyncio is not imported by ddtrace.auto or ddtrace-run.
+    # If asyncio is imported by ddtrace.auto the asyncio event loop with fail
+    # to register new loops in some platforms (e.g. Ubuntuu).
     import sys
-    import ddtrace.auto
-    assert "asyncio" not in sys.modules
+
+    import ddtrace.auto  # noqa: F401
+
+    assert "asyncio" not in sys.modules