diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 4b0e0c59..0e47666d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -16,5 +16,5 @@ jobs:
           python-version: "3.10"
 
       - run: pip install .
-      - run: pip install -U pytest
+      - run: pip install -U pytest trio
       - run: pytest