diff --git a/README.md b/README.md
index 74ea3f0..b8ed37b 100644
--- a/README.md
+++ b/README.md
@@ -239,7 +239,7 @@ killall Finder
 ```bash
 swift test
 bash Tests/CaskStructureTests.sh
-./Scripts/validate_cask.sh
+CASK_VERIFY_DOWNLOAD=0 ./Scripts/validate_cask.sh
 ./Scripts/build.sh
 codesign --verify --deep --strict --verbose=2 build/RightClickAssistant.app
 hdiutil verify build/RightClickAssistant.dmg