diff --git a/build/pipeline.yml b/build/pipeline.yml
index 369d76d5..4d2eeaeb 100644
--- a/build/pipeline.yml
+++ b/build/pipeline.yml
@@ -56,6 +56,7 @@ extends:
             displayName: Test npm package
             env:
               DISPLAY: ':99.0'
+            failOnStderr: true
 
         publishPackage: ${{ parameters.publishPackage }}
         publishRequiresApproval: false