diff --git a/.github/workflows/oldest.yml b/.github/workflows/oldest.yml
index 95b59e0a16..5eb0f8228f 100644
--- a/.github/workflows/oldest.yml
+++ b/.github/workflows/oldest.yml
@@ -27,7 +27,7 @@ jobs:
         with:
           submodules: true
       - name: OPAM dependencies
-        run: tools/runner.sh opam_install menhir
+        run: tools/runner.sh opam_install menhir=20200624
       - name: Configure
         run: tools/runner.sh configure
       - name: Build
diff --git a/test b/test
index 4a25324208..02fc1f7521 160000
--- a/test
+++ b/test
@@ -1 +1 @@
-Subproject commit 4a253242086d1ce78365d1b5cac3201193fa3814
+Subproject commit 02fc1f752101db18e8ac0b103a0e1222a7f94702