diff --git a/.circleci/config.yml b/.circleci/config.yml
index 52d7411ea..6e10c0fbf 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -17,6 +17,7 @@ jobs:
             sudo apt-get install apt-transport-https
             sudo apt-get update
             sudo apt-get install dotnet-sdk-2.1
+            dotnet build /p:TreatWarningsAsErrors=true
             cd BTCPayServer.Tests
             dotnet test --filter Fast=Fast
             docker-compose up -d dev