diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index ef300df8..1bad46df 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -52,7 +52,5 @@ jobs:
         shell: bash
         run: |
             set -ex
-            mkdir -p ../_newstack
-            stack upgrade --force-download --local-bin-path ../_newstack
-            ../_newstack/stack --version
-            ../_newstack/stack test --fast --no-terminal ${{ matrix.args }}
+            stack --version
+            stack test --fast --no-terminal ${{ matrix.args }}