diff --git a/appveyor.yml b/appveyor.yml
index 81c5cff..721f7fd 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -32,5 +32,5 @@ build: false
 test_script:
   - cargo build --verbose
   - cargo run -- --help
-  - cargo run -- 'echo test'
+  - cargo run -- "echo test"
   - cargo test