diff --git a/src/index.js b/src/index.js
index 2c6025a5..2d96fab6 100644
--- a/src/index.js
+++ b/src/index.js
@@ -248,8 +248,9 @@ export default class SauceLabs {
         args.push(`--user=${this.username}`)
         args.push(`--api-key=${this._accessKey}`)
 
-        if (!args.some(arg => arg.startsWith('--region'))) {
-            const scRegion = getRegionSubDomain(this.region)
+        const region = argv.region || this.region
+        if (region) {
+            const scRegion = getRegionSubDomain({ region })
                 .split('-').slice(0, 2).join('-')
             args.push(`--region=${scRegion}`)
         }
diff --git a/tests/__snapshots__/index.test.js.snap b/tests/__snapshots__/index.test.js.snap
index 837b6064..11b77b34 100644
--- a/tests/__snapshots__/index.test.js.snap
+++ b/tests/__snapshots__/index.test.js.snap
@@ -33,7 +33,7 @@ Array [
       "--no-proxy-caching",
       "--user=foo",
       "--api-key=bar",
-      "--region=us-west",
+      "--region=eu-central",
     ],
   ],
 ]
diff --git a/tests/index.test.js b/tests/index.test.js
index bf984ff7..2c958c59 100644
--- a/tests/index.test.js
+++ b/tests/index.test.js
@@ -385,6 +385,7 @@ describe('startSauceConnect', () => {
             tunnelIdentifier: 'my-tunnel',
             'proxy-tunnel': 'abc',
             verbose: true,
+            region: 'eu',
             noProxyCaching: true,
             logger: (log) => logs.push(log)
         })