Fix flaky tornado test by increasing delta tolerance to 0.02 (#4550)

Copilot · xrmx · web-flow · commit 47a3d9dd39aa · 2026-05-08T13:31:27.000Z
* Initial plan * Fix flaky tornado test by increasing delta tolerance to 0.02 The test_metrics_concurrent_requests test was flaky on pypy/ubuntu because the delta between server and client duration for fast async requests can exceed 0.01 seconds due to scheduling jitter. Assisted-by: Claude Sonnet 4 Agent-Logs-Url: https://github.com/open-telemetry/opentelemetry-python-contrib/sessions/a65606a0-612d-49b2-bcda-8b3942ee3e63 Co-authored-by: xrmx <12932+xrmx@users.noreply.github.com> --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: xrmx <12932+xrmx@users.noreply.github.com> Co-authored-by: Riccardo Magliocchetti <riccardo.magliocchetti@gmail.com>
diff --git a/instrumentation/opentelemetry-instrumentation-tornado/tests/test_metrics_instrumentation.py b/instrumentation/opentelemetry-instrumentation-tornado/tests/test_metrics_instrumentation.py
@@ -246,7 +246,7 @@ async def test_metrics_concurrent_requests(self):
                 - req2_client_duration_data_point.sum
             ),
             0.0,
-            delta=0.01,
+            delta=0.02,
         )
 
         # Make sure duration is roughly equivalent to expected (req1/slow) should be around 1 second

Original file line number	Diff line number	Diff line change
`@@ -246,7 +246,7 @@ async def test_metrics_concurrent_requests(self):`
`246`	`246`	`- req2_client_duration_data_point.sum`
`247`	`247`	`),`
`248`	`248`	`0.0,`
`249`		`- delta=0.01,`
	`249`	`+ delta=0.02,`
`250`	`250`	`)`
`251`	`251`
`252`	`252`	`# Make sure duration is roughly equivalent to expected (req1/slow) should be around 1 second`