diff --git a/testing/eth1_test_rig/src/ganache.rs b/testing/eth1_test_rig/src/ganache.rs
index 9b6a33ff59..d8df3fd8ae 100644
--- a/testing/eth1_test_rig/src/ganache.rs
+++ b/testing/eth1_test_rig/src/ganache.rs
@@ -166,7 +166,7 @@ impl GanacheInstance {
 }
 
 fn endpoint(port: u16) -> String {
-    format!("http://localhost:{}", port)
+    format!("http://127.0.0.1:{}", port)
 }
 
 impl Drop for GanacheInstance {