diff --git a/.env.local.example b/.env.local.example
index ad963dfb4..c1e013b50 100644
--- a/.env.local.example
+++ b/.env.local.example
@@ -17,6 +17,7 @@ DEPLOY_PRIME_URL="http://localhost:3000"
 DESIGN_SYSTEM_ACCESS_TOKEN=""
 NEXTAUTH_REDIRECT_PROXY_URL="http://localhost:3000/api/web/auth"
 NEXTAUTH_SECRET=""
+# NEXTAUTH_URL="DO NOT SET THIS HERE, it is managed in next.config.js"
 REVALIDATE_SECRET=""
 SEAMLESS_LOGIN_DA="http://www.example.dk/updatelogin"
 SEAMLESS_LOGIN_DE="http://www.example.de/updatelogin"
@@ -25,4 +26,3 @@ SEAMLESS_LOGIN_FI="http://www.example.fi/updatelogin"
 SEAMLESS_LOGIN_NO="http://www.example.no/updatelogin"
 SEAMLESS_LOGIN_SV="http://www.example.se/updatelogin"
 WEBVIEW_ENCRYPTION_KEY="MTIzNDU2Nzg5MDEyMzQ1Njc4OTAxMjM0NTY3ODkwMTI="
-
diff --git a/next.config.js b/next.config.js
index 318c5f938..d063d6367 100644
--- a/next.config.js
+++ b/next.config.js
@@ -13,24 +13,23 @@ const jiti = createJiti(new URL(import.meta.url).pathname)
 jiti("./env/server")
 jiti("./env/client")
 
+// We define SCANDIC_ENV_URL for stable environments on Netlify:
+// production, stage and test. Avoid using SCANDIC_ENV_URL locally.
+// For deployments to those branches we have SCANDIC_ENV_URL defined.
+// Otherwise we fallback to DEPLOY_PRIME_URL from Netlify built-in variables.
+// Locally we set DEPLOY_PRIME_URL
+const ENV_URL = process.env.SCANDIC_ENV_URL || process.env.DEPLOY_PRIME_URL
+
 // We set NEXTAUTH_URL here because next.config.js is included in Netlify
 // functions when bundling. Otherwise we are unable to login on preview
-// deployments. We use DEPLOY_PRIME_URL from Netlify for all non-production
-// branches. Locally we set it in .env.local instead of NEXTAUTH_URL.
-// Netlify`s Next.js Runtime has built-in support for Next-Auth,
+// deployments. Netlify`s Next.js Runtime has built-in support for Next-Auth,
 // but Next-Auth v5 is ESM and therefore not yet handle correctly by Netlify.
 // This workaround should not be needed once Netlify fixes their code.
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   env: {
-    URL:
-      process.env.CONTEXT === "production"
-        ? process.env.URL
-        : process.env.DEPLOY_PRIME_URL,
-    NEXTAUTH_URL:
-      (process.env.CONTEXT === "production"
-        ? process.env.URL
-        : process.env.DEPLOY_PRIME_URL) + "/api/web/auth",
+    URL: ENV_URL,
+    NEXTAUTH_URL: `${ENV_URL}/api/web/auth`,
   },
   poweredByHeader: false,
   eslint: { ignoreDuringBuilds: true },