From 5fbd7adee8eb0a5ef187e8806e92536212a4ccd8 Mon Sep 17 00:00:00 2001
From: Jimmy Chen <jchen.tc@gmail.com>
Date: Wed, 29 Apr 2026 17:22:23 +0200
Subject: [PATCH 1/2] Replace electra sync tests with gloas sync tests.

---
 .github/workflows/local-testnet.yml                      | 2 +-
 ...onfig-electra.yaml => genesis-sync-config-gloas.yaml} | 9 +++++++--
 scripts/tests/genesis-sync.sh                            | 2 +-
 3 files changed, 9 insertions(+), 4 deletions(-)
 rename scripts/tests/{genesis-sync-config-electra.yaml => genesis-sync-config-gloas.yaml} (67%)

diff --git a/.github/workflows/local-testnet.yml b/.github/workflows/local-testnet.yml
index 308ddcf8192..db40e44a227 100644
--- a/.github/workflows/local-testnet.yml
+++ b/.github/workflows/local-testnet.yml
@@ -220,7 +220,7 @@ jobs:
     needs: dockerfile-ubuntu
     strategy:
       matrix:
-        fork: [electra, fulu]
+        fork: [fulu, gloas]
         offline_secs: [120, 300]
     steps:
       - uses: actions/checkout@v5
diff --git a/scripts/tests/genesis-sync-config-electra.yaml b/scripts/tests/genesis-sync-config-gloas.yaml
similarity index 67%
rename from scripts/tests/genesis-sync-config-electra.yaml
rename to scripts/tests/genesis-sync-config-gloas.yaml
index 0e41a5d1655..61540e324b6 100644
--- a/scripts/tests/genesis-sync-config-electra.yaml
+++ b/scripts/tests/genesis-sync-config-gloas.yaml
@@ -2,18 +2,23 @@
 participants:
   - cl_type: lighthouse
     cl_image: lighthouse:local
+    el_type: geth
+    el_image: ethpandaops/geth:glamsterdam-devnet-0
     count: 2
   # nodes without validators, used for testing sync.
   - cl_type: lighthouse
     cl_image: lighthouse:local
+    el_type: geth
+    el_image: ethpandaops/geth:glamsterdam-devnet-0
     validator_count: 0
   - cl_type: lighthouse
     cl_image: lighthouse:local
+    el_type: geth
+    el_image: ethpandaops/geth:glamsterdam-devnet-0
     validator_count: 0
 network_params:
+  gloas_fork_epoch: 0
   slot_duration_ms: 6000
-  electra_fork_epoch: 0
-  fulu_fork_epoch: 100000 # a really big number so this test stays in electra
   preset: "minimal"
 additional_services:
   - tx_fuzz
diff --git a/scripts/tests/genesis-sync.sh b/scripts/tests/genesis-sync.sh
index 39628c9e73c..daac60eb613 100755
--- a/scripts/tests/genesis-sync.sh
+++ b/scripts/tests/genesis-sync.sh
@@ -7,7 +7,7 @@
 SCRIPT_DIR="$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
 
 ENCLAVE_NAME=${1:-genesis-sync-testnet}
-CONFIG=${2:-$SCRIPT_DIR/genesis-sync-config-electra.yaml}
+CONFIG=${2:-$SCRIPT_DIR/genesis-sync-config-fulu.yaml}
 FORK_TYPE=${3:-electra}  # electra or fulu
 OFFLINE_DURATION_SECS=${4:-120} # stopped duration  of non validating nodes
 

From 73c30b1f283b3155beeb149409ff4c8571828721 Mon Sep 17 00:00:00 2001
From: Jimmy Chen <jchen.tc@gmail.com>
Date: Thu, 30 Apr 2026 00:20:26 +0200
Subject: [PATCH 2/2] Use mainnet preset for genesis sync tests

---
 scripts/tests/genesis-sync-config-gloas.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/tests/genesis-sync-config-gloas.yaml b/scripts/tests/genesis-sync-config-gloas.yaml
index 61540e324b6..ffad0a05b23 100644
--- a/scripts/tests/genesis-sync-config-gloas.yaml
+++ b/scripts/tests/genesis-sync-config-gloas.yaml
@@ -19,7 +19,7 @@ participants:
 network_params:
   gloas_fork_epoch: 0
   slot_duration_ms: 6000
-  preset: "minimal"
+  preset: "mainnet"
 additional_services:
   - tx_fuzz
   - spamoor