diff --git a/packages/suite-desktop-core/src/config.ts b/packages/suite-desktop-core/src/config.ts
index 3974f466f28..c6aa60ddeaf 100644
--- a/packages/suite-desktop-core/src/config.ts
+++ b/packages/suite-desktop-core/src/config.ts
@@ -13,6 +13,7 @@ export const allowedDomains = [
     'localhost',
     '127.0.0.1',
     'trezor.io',
+    'sldev.cz', // Test environment, available only with VPN
     'invity.io',
     'api.github.com',
     'api.dropboxapi.com',