> For the complete documentation index, see [llms.txt](https://docs.sealights.io/knowledgebase/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sealights.io/knowledgebase/setup-and-configuration/integrations/testing-frameworks-integration/improve-test-optimization-with-context-propagation.md).
# Improve Test Optimization With Context Propagation
SeaLights is using [Open Telemetry](https://opentelemetry.io/) to propagate the context of your tests, this allow to enrich the test optimization statistical model to an almost 1:1 relationship between a test and the code of the application it is testing.
There are 2 main ways to propagate the context of a test:
1. The utilization of a baggage
2. The utilization of a cookie
In order to set this up, these are the necessary steps you need to take:
1. Set up the testing framework to set either the baggage or the cookie with the test information, including:
1. Test name
2. Test session ID
2. Set up the front-end agent with the flag to enable Open Telemetry usage
3. Set up the backend agent with the flags to enable Open Telemetry usage
### Set Context Propagation on the Node Agent
In order to enable context propagation on the Node Agent, you will need to set the `--enableOpenTelemetry` flag when applying the `scan` command, for example:
{% code overflow="wrap" lineNumbers="true" %}
```
npx slnodejs scan --workspacepath ./MyApp --tokenfile sltoken.txt --buildsessionidfile buildSessionId --scm none --instrumentForBrowsers --enableOpenTelemetry --outputpath "sl_dist"
```
{% endcode %}
### Set Context Propagation on the Java Agent
In order to enable context propagation on the Java Agent, you will need to set the following flags when starting the test listener:
* sl.otelEnabled=true
* sl.otelConfiguration.enabled=true
* sl.otelConfiguration.loadEmbeddedAgent=true
* sl.featuresData.codeCoverageManagerVersion=v3
For example:
{% code overflow="wrap" lineNumbers="true" %}
```
-javaagent:/path/to/sl-test-listener.jar -Dsl.tags=backend -Dsl.labId= -Dsl.otelEnabled=true -Dsl.otelConfiguration.enabled=true -Dsl.otelConfiguration.loadEmbeddedAgent=true -Dsl.featuresData.codeCoverageManagerVersion=v3
```
{% endcode %}
## Testing Frameworks
### Setting Context Propagation with PlayWright
In order to set the context with the baggage, please follow [this guide](https://github.com/Sealights/sealights-integration-examples/tree/main/playwright-browser-agent-otel#2-setting-the-testsessionid-and-testname).
### Setting Context Propagation With Cypress
In order to set the context with the baggage, please follow [this guide](https://github.com/Sealights/sealights-integration-examples/blob/main/cypress-browser-agent-otel/README.md).
### Setting Context Propagation With Gauge
In order to set the context with the baggage, please follow [this guide](https://github.com/Sealights/sealights-integration-examples/blob/main/gauge-browser-agent-otel/README.md).
---
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