diff --git a/.github/workflows/weekly.yml b/.github/workflows/weekly.yml
index da201b78..1166f3d7 100644
--- a/.github/workflows/weekly.yml
+++ b/.github/workflows/weekly.yml
@@ -14,4 +14,4 @@ jobs:
           ocaml-compiler: 4.13.1
       - run: opam install ppx_deriving visitors easy_logging zarith yojson core_unix odoc menhir
       - run: opam exec -- make build
-      - run: opam exec -- IN_CI=1 make test
+      - run: IN_CI=1 opam exec -- make test