diff --git a/lib/platform/github/index.js b/lib/platform/github/index.js
index f9424602442768da8edbb81091b88d3e1a8cfc1f..5d8b2c2705ea039511ced8bbe1c063156f9d9541 100644
--- a/lib/platform/github/index.js
+++ b/lib/platform/github/index.js
@@ -110,6 +110,7 @@ async function initRepo({
   logger.debug('Resetting platform config');
   // config is used by the platform api itself, not necessary for the app layer to know
   cleanRepo();
+  config.isGhe = endpoint && !endpoint.startsWith('https://api.github.com');
   config.localDir = localDir;
   config.platform = 'github';
   config.repository = repository;
@@ -1249,8 +1250,7 @@ async function mergePr(prNo, branchName) {
 }
 
 function getPrBody(input) {
-  const endpoint = process.env.GITHUB_ENDPOINT;
-  if (endpoint && !endpoint.startsWith('https://api.github.com')) {
+  if (config.isGhe) {
     return input.substring(0, 60000);
   }
   return (
diff --git a/test/platform/github/index.spec.js b/test/platform/github/index.spec.js
index 16532932e6e170ea885943b48feb6be940e1c71f..ffa000898ed95330aa42fb0af5449db2ce707c7f 100644
--- a/test/platform/github/index.spec.js
+++ b/test/platform/github/index.spec.js
@@ -1482,13 +1482,15 @@ describe('platform/github', () => {
         'https://github.com/foo/bar/issues/5 plus also [a link](https://github.com/foo/bar/issues/5)';
       expect(github.getPrBody(input)).toMatchSnapshot();
     });
-    it('returns not-updated pr body for GHE', () => {
-      const endpoint = process.env.GITHUB_ENDPOINT;
-      process.env.GITHUB_ENDPOINT = 'https://github.mycompany.com';
+    it('returns not-updated pr body for GHE', async () => {
+      await initRepo({
+        repository: 'some/repo',
+        token: 'some-token',
+        endpoint: 'https://github.company.com/api/v3/',
+      });
       const input =
         'https://github.com/foo/bar/issues/5 plus also [a link](https://github.com/foo/bar/issues/5)';
       expect(github.getPrBody(input)).toEqual(input);
-      process.env.GITHUB_ENDPOINT = endpoint;
     });
   });
   describe('mergePr(prNo) - autodetection', () => {