diff --git a/appveyor.yml b/appveyor.yml
index cd428639b..37e2fb347 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -15,9 +15,11 @@ environment:
     STACK_ROOT: "c:\\sr"
 
 test_script:
-- echo "" | stack --no-terminal --install-ghc test hledger hledger-web hledger-api
+- echo "" | stack --no-terminal --install-ghc test -j1 hledger hledger-web hledger-api
 - stack --local-bin-path . -j1 install hledger hledger-web hledger-api
-# -j1 temporary workaround for https://github.com/commercialhaskell/stack/issues/2617
+# -j1 is temporary, attempting to work around  
+# https://github.com/simonmichael/hledger/issues/424
+# https://github.com/commercialhaskell/stack/issues/2617
 
 artifacts:
 - path: hledger.exe