diff --git a/test/kinto-e2e/src/index.ts b/test/kinto-e2e/src/index.ts
index 87ad6bb0..9082dc82 100644
--- a/test/kinto-e2e/src/index.ts
+++ b/test/kinto-e2e/src/index.ts
@@ -50,7 +50,7 @@ const runAgainstBlockHeight = async ({
         forkBlockNumber: opInfo.blockNum - 1n
     })
 
-    const altoRpc = `http://localhost:${altoPort}`
+    const altoRpc = `http://127.0.0.1:${altoPort}`
     const anvilRpc = `http://${anvil.host}:${anvil.port}`
 
     // spin up new alto instance
diff --git a/test/kinto-e2e/src/setupAlto.ts b/test/kinto-e2e/src/setupAlto.ts
index 85d4f297..356c1096 100644
--- a/test/kinto-e2e/src/setupAlto.ts
+++ b/test/kinto-e2e/src/setupAlto.ts
@@ -50,13 +50,13 @@ export const startAlto = async (rpc: string, altoPort: string) => {
     alto.stderr.on("data", (data) => console.log(data.toString()))
 
     await waitPort({
-        host: "localhost",
+        host: "127.0.0.1",
         port: Number.parseInt(altoPort),
         output: "silent"
     })
 
     while (
-        !(await fetch(`http://localhost:${altoPort}/health`)
+        !(await fetch(`http://127.0.0.1:${altoPort}/health`)
             .then((res) => res.ok)
             .catch(() => false))
     ) {