diff --git a/appveyor.yml b/appveyor.yml
index 11379c838..8e3866a34 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -14,7 +14,7 @@ install:
 build: false
 
 test_script:
-- cargo test
+- cargo test --release
 
 cache:
   - target