try remove dotnet build
MODIFY
appveyor.yml
appveyor.yml
@@ -8,10 +8,6 @@ cache:
- '%USERPROFILE%\.nuget\packages -> **\*.csproj'
- '%APPDATA%\WalletWasabi'
-build_script:
- - cd WalletWasabi.Tests
- - dotnet build
-
test_script:
- cd WalletWasabi.Tests
- dotnet test --filter Category=RunOnCi

try remove dotnet build