---
title: "Save and test the connection | Grafana Labs"
description: "Save the Tempo data source and test the connection to confirm Grafana can reach your Tempo backend."
---

> For a curated documentation index, see [llms.txt](/llms.txt). For the complete documentation index, see [llms-full.txt](/llms-full.txt).

# Save and test the connection

When you save the data source, Grafana issues a test query to Tempo using the URL and credentials you configured. A success message confirms that Grafana can reach your Tempo backend and that authentication is working.

To save and test the connection, complete the following step:

1. Click **Save & test**.
   
   When successful, a green banner confirms the connection. If the test fails, Grafana shows an error describing the problem — for example, an unreachable URL, an invalid token, or a missing tenant header.

In the next milestone, you verify that trace data flows through to Explore.

* * *

### More to explore (optional)

- [Configure the Tempo data source](/docs/grafana/latest/datasources/tempo/configure-tempo-data-source/)
- [Provision the Tempo data source](/docs/grafana/latest/datasources/tempo/configure-tempo-data-source/provision/)

Were you successful?

![No](/media/images/svg/thumbs-up.svg) No

![Yes](/media/images/svg/thumbs-up.svg) Yes

Super! You can move to the next step.

* * *

### Troubleshooting

Explore the following troubleshooting topics if you need help:

- [Troubleshoot Tempo data source issues](/docs/grafana/latest/datasources/tempo/troubleshooting/)
- [Streaming issues](/docs/grafana/latest/datasources/tempo/troubleshooting/#streaming-issues)
- [Private data source connections](/docs/grafana-cloud/connect-externally-hosted/private-data-source-connect/)

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