diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 3370eef8..e737ec01 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -13,7 +13,7 @@ on:
 
 env:
   SO_VERSION: v1.1.0-87fffca-202404110321
-  FIXTURENET_ETH_STACKS_REF: main
+  FIXTURENET_ETH_STACKS_REF: fix-plugeth-flags
 
 jobs:
   test: