diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
new file mode 100644
index 000000000..89457f775
--- /dev/null
+++ b/.github/pull_request_template.md
@@ -0,0 +1,31 @@
+### Description of proposed changes
+
+<!-- What is the goal of this pull request? What does this pull request change? -->
+
+### Related issue(s)
+
+<!--
+Link any related issues here. Use GitHub's special keywords if appropriate¹.
+Type `#` followed the name of an issue and GitHub will auto-suggest the issue number for you.
+
+¹ https://docs.github.com/en/get-started/writing-on-github/working-with-advanced-formatting/using-keywords-in-issues-and-pull-requests
+-->
+
+### Testing
+
+<!--
+Make sure checks are successful at the bottom of the PR.
+
+If applicable, add:
+- any changes to existing tests
+- any additional manual testing to confirm changes
+
+Please add a note if you need help with adding tests.
+-->
+
+- [ ] Checks pass
+- [ ] (to be done by a Nextstrain team member) [Create preview PRs on downstream repositories][1].
+
+[1]: https://github.com/nextstrain/auspice/blob/-/DEV_DOCS.md#test-on-downstream-repositories
+
+<!-- 🙌 Thank you for contributing to Nextstrain! ✨ -->
diff --git a/DEV_DOCS.md b/DEV_DOCS.md
index 1bbb7dc23..af737256a 100644
--- a/DEV_DOCS.md
+++ b/DEV_DOCS.md
@@ -102,6 +102,15 @@ Run `npm run lint`. If there are issues run `npm run lint:fix`.
 
 A Heroku pipeline for this repository is connected to GitHub under the nextstrain-bot user account. The Review Apps feature facilitates manual review of changes by automatically creating a test instance from the PR source branch and adding a link to it on the GitHub PR page. These apps are based on configuration in [app.json](./app.json).
 
+#### Test on downstream repositories
+
+Additionally, a GitHub Actions workflow has been set up to generate PRs in downstream repositories that reflect the new changes in Auspice. To use it:
+
+1. Go to [the workflow page](https://github.com/nextstrain/auspice/actions/workflows/make_prs_for_other_repos.yaml).
+2. Select **Run workflow**.
+3. Pick the PR branch, select the downstream repositories you wish to test, and **Run workflow**.
+4. Wait for the workflow to finish running. The Auspice PR should show new reference links from the generated PRs.
+
 ## git-lfs
 
 We use [Git Large File Storage](https://github.com/git-lfs/git-lfs) to manage certain assets.