diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 239ee9e..d9fdfef 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,5 +13,6 @@ jobs:
           node-version: 20
       - run: git clone https://github.com/rrthomas/topiary ~/topiary && cd ~/topiary && cargo install --path topiary-cli
       - run: |
+          RUST_BACKTRACE=full topiary -v -v -v -v format --language ursa --query ./ursa/src/topiary/ursa.scm < ./ursa/src/ursa/prelude.ursa
           npm install
           npm run test-all