diff --git a/packages/safe-chain/src/registryProxy/certUtils.js b/packages/safe-chain/src/registryProxy/certUtils.js
index da969fc..c9fe99a 100644
--- a/packages/safe-chain/src/registryProxy/certUtils.js
+++ b/packages/safe-chain/src/registryProxy/certUtils.js
@@ -168,7 +168,16 @@ function loadCa() {
   }
 
   const { privateKey, certificate } = generateCa();
-  fs.mkdirSync(certFolder, { recursive: true });
+  
+  // Ensure directory exists before writing files
+  try {
+    fs.mkdirSync(certFolder, { recursive: true });
+  } catch (error) {
+    // Directory might already exist or there's a permission issue
+    if (/** @type {any} */(error).code !== 'EEXIST') {
+      throw error;
+    }
+  }
   
   // Write files and ensure they're flushed to disk
   const keyFd = fs.openSync(keyPath, 'w');
diff --git a/packages/safe-chain/src/registryProxy/registryProxy.mitm.spec.js b/packages/safe-chain/src/registryProxy/registryProxy.mitm.spec.js
index 82abe0c..6855449 100644
--- a/packages/safe-chain/src/registryProxy/registryProxy.mitm.spec.js
+++ b/packages/safe-chain/src/registryProxy/registryProxy.mitm.spec.js
@@ -9,23 +9,11 @@ import {
 import { getCaCertPath } from "./certUtils.js";
 import { setEcoSystem, ECOSYSTEM_JS, ECOSYSTEM_PY } from "../config/settings.js";
 import fs from "fs";
-import path from "path";
-import os from "os";
 
 describe("registryProxy.mitm", () => {
   let proxy, proxyHost, proxyPort;
 
   before(async () => {
-    // Clean up any existing CA certificates to ensure fresh generation with new extensions
-    const certFolder = path.join(os.homedir(), ".safe-chain", "certs");
-    try {
-      if (fs.existsSync(certFolder)) {
-        fs.rmSync(certFolder, { recursive: true, force: true });
-      }
-    } catch (error) {
-      // Ignore errors during cleanup
-    }
-    
     proxy = createSafeChainProxy();
     await proxy.startServer();
     const envVars = mergeSafeChainProxyEnvironmentVariables([]);