diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a882759..175439a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -40,7 +40,7 @@ jobs:
       - uses: actions/setup-dotnet@v4
         with:
           dotnet-version: 10.0.x
-      - run: dotnet test backend/BigRegister.sln
+      - run: dotnet test backend/BigRegister.slnx
 
   api-client-drift:
     # The committed typed client must match the backend OpenAPI doc.