diff --git a/library/stdarch/.appveyor.yml b/library/stdarch/.appveyor.yml
index 352b3bc3aa91..af352a0c8688 100644
--- a/library/stdarch/.appveyor.yml
+++ b/library/stdarch/.appveyor.yml
@@ -15,4 +15,5 @@ build: false
 
 test_script:
   - cargo test --target %TARGET%
+  - set RUST_BACKTRACE=1
   - cargo test --target %TARGET% --release