diff --git a/bin/config-validator.js b/bin/config-validator.js
old mode 100644
new mode 100755
index 8ee1c7d83e3a4537c39b6099dc38e7d705d41f7b..f700db3e8b061b0f547ef17acb7b254edd1cdd04
--- a/bin/config-validator.js
+++ b/bin/config-validator.js
@@ -3,6 +3,7 @@
 const fs = require('fs-extra');
 const { validateConfig } = require('../lib/config/validation');
 const { massageConfig } = require('../lib/config/massage');
+const { getConfig } = require('../lib/config/file');
 const { initLogger } = require('../lib/logger');
 const cache = require('../lib/workers/global/cache');
 const { configFileNames } = require('../lib/config/app-strings');
@@ -63,6 +64,18 @@ async function validate(desc, config, isPreset = false) {
   } catch (err) {
     // ignore
   }
+  try {
+    const fileConfig = getConfig(process.env);
+    console.log(`Validating config.js`);
+    try {
+      await validate('config.js', fileConfig);
+    } catch (err) {
+      console.log(`config.js is not valid Renovate config`);
+      returnVal = 1;
+    }
+  } catch (err) {
+    // ignore
+  }
   if (returnVal !== 0) {
     process.exit(returnVal);
   }