diff --git a/README.md b/README.md
index ea99029d..c6ff6a90 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,7 @@ relates to weekly certification
 - CERTIFICATE_DIR: The path to the client certificate (certificate must be in PFX/P12 format)
 - PFX_FILE: The name of the client certificate file
 - (Optional) PFX_PASSPHRASE: The import passphrase for the client certificate if there is one
+- (Optional) URL_UIO_LANDING, URL_UIOMOBILE_LANDING: The environment-specific links to the UIO and UIO Mobile landing pages
 
 For local development:
 
diff --git a/utils/getUrl.ts b/utils/getUrl.ts
index 69721f10..e6be0497 100644
--- a/utils/getUrl.ts
+++ b/utils/getUrl.ts
@@ -11,6 +11,10 @@ export type UrlType = keyof typeof urls
  * Get url from urls.json
  */
 export default function getUrl(linkKey: string): string | undefined {
+  // Optional environment-specific links back to the UIO landing page, used by EDD testing
+  if (linkKey === 'uio-home-url-desktop' && process.env.URL_UIO_LANDING) return process.env.URL_UIO_LANDING
+  if (linkKey === 'uio-home-url-mobile' && process.env.URL_UIOMOBILE_LANDING) return process.env.URL_UIOMOBILE_LANDING
+
   // Explicitly cast to one of the allowed keys in urls.json.
   // If the key does not exist in urls.json, this function will return undefined.
   const key = linkKey as UrlType