diff --git a/changelog.d/4-docs/hotfix-pr-guidelines b/changelog.d/4-docs/hotfix-pr-guidelines
new file mode 100644
index 0000000000..940c66b8ff
--- /dev/null
+++ b/changelog.d/4-docs/hotfix-pr-guidelines
@@ -0,0 +1 @@
+Adding a testing config entry to the PR guidelines.
\ No newline at end of file
diff --git a/docs/src/developer/developer/pr-guidelines.md b/docs/src/developer/developer/pr-guidelines.md
index be0bf1f01b..09b7e37fd2 100644
--- a/docs/src/developer/developer/pr-guidelines.md
+++ b/docs/src/developer/developer/pr-guidelines.md
@@ -87,6 +87,9 @@ If a PR adds new configuration options for say brig, the following files need to
 * [ ] The values files for CI: `hack/helm_vars/wire-server/values.yaml.gotmpl`
 * [ ] The configuration docs: `docs/src/developer/reference/config-options.md`
 
+Additional configuration may also exist for services in the following locations.
+* [ ] `charts/$SERVICE/templates/tests/configmap.yaml`
+
 If any new configuration value is required and has no default, then:
 
 * [ ] Write a changelog entry in `0-release-notes` advertising the new configuration value