diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 9acec46..32555ed 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -36,6 +36,8 @@ jobs:
 
       - name: test
         run: make test INSTALL_EXTRA=test
+        env:
+          VENV: not-default-venv
 
   test-windows:
     strategy: