Send Slack Messages with TestingBot Webhooks

With the Slack webhook template, you get a message in your Slack channel whenever a test completes, or only when a test fails. The message shows the test result, the browser, platform and duration, plus a button that opens the test details page with video, logs and screenshots.

Prerequisites

You need a Slack incoming webhook URL for the channel where messages should appear:

Create a Slack app for your workspace (or open an existing one) at api.slack.com/apps.
In the app settings, open Incoming Webhooks and activate them.
Click Add New Webhook to Workspace and pick the target channel.
Copy the generated https://hooks.slack.com/services/... URL.

Prefer a richer Slack experience? TestingBot also offers a native Slack integration with slash commands, URL unfurling and test event notifications, without writing any payloads.

Set up the webhook in TestingBot

Log in to the member area and go to the Webhooks page.
Click Create webhook.
Under Start from a template, pick the Slack tile. This prefills the HTTP method and the payload body.
Paste your https://hooks.slack.com/services/... URL in the URL field.
Adjust the triggers: failures only or all tests, the test type and an optional name filter.
Click Create webhook at the bottom of the form to save the configuration.

Template payload

The Slack template sends this Block Kit payload:

{
  "blocks": [
    {
      "type": "header",
      "text": {
        "type": "plain_text",
        "text": "Test {{TEST_STATUS}}: {{TEST_NAME}}"
      }
    },
    {
      "type": "section",
      "fields": [
        { "type": "mrkdwn", "text": "*Browser:* {{BROWSER_NAME}} {{BROWSER_VERSION}}" },
        { "type": "mrkdwn", "text": "*Platform:* {{PLATFORM}}" },
        { "type": "mrkdwn", "text": "*Duration:* {{TEST_DURATION}} seconds" }
      ]
    },
    {
      "type": "actions",
      "elements": [
        {
          "type": "button",
          "text": { "type": "plain_text", "text": "View test" },
          "url": "{{TEST_URL}}"
        }
      ]
    }
  ]
}

There are no placeholders to replace in this payload: the Slack channel is determined by the webhook URL itself. The {{...}} tokens are substituted with the values of the test that triggered the webhook; the full list is on the built-in variables page.

Test it

Click Test Webhook in the form to send a sample request with example values. On success, a message appears in your Slack channel within a few seconds and the Response panel shows a 200 status with the body ok.

If nothing arrives, check for these common causes:

The webhook URL is incomplete or was revoked in Slack.
Incoming webhooks are not activated for your Slack app.
The payload JSON was edited and is no longer valid; Slack responds with invalid_payload.