diff --git a/scripts/test-gateway.mjs b/scripts/test-gateway.mjs
index 47bb3d3f..b7046e78 100644
--- a/scripts/test-gateway.mjs
+++ b/scripts/test-gateway.mjs
@@ -12,7 +12,7 @@ export const DEFAULT_IMAGE_TAG = "truckwash-edge-agent:test-gateway";
 export const DEFAULT_CONFIG_FILE_NAME = "test-gateway.json";
 export const DEFAULT_HOST_API_URL = "http://localhost/api";
 export const DEFAULT_CONTAINER_API_URL = "http://caddy";
-export const DEFAULT_CONTAINER_BROKER_URL = "http://edge-broker:4300";
+export const DEFAULT_CONTAINER_BROKER_URL = "ws://edge-broker:4300";
 export const DEFAULT_INSTALL_DIR = "/opt/truckwash-edge-agent";
 export const DEFAULT_RUNTIME_DIR = `${DEFAULT_INSTALL_DIR}/runtime`;
 export const DEFAULT_STATE_DATABASE_PATH = `${DEFAULT_RUNTIME_DIR}/gateway-state.sqlite`;
@@ -409,14 +409,20 @@ async function startContainer({
   });
 
   if (copyConfig) {
-    await runCommand("docker", [
-      "cp",
-      path.join(configDir, DEFAULT_CONFIG_FILE_NAME),
-      `${containerName}:${containerConfigPath}`,
-    ], {
-      cwd: rootDir,
-      stdio: "inherit",
-    });
+    const configFilePath = path.join(configDir, DEFAULT_CONFIG_FILE_NAME);
+    await fs.chmod(configFilePath, 0o666).catch(() => {});
+    try {
+      await runCommand("docker", [
+        "cp",
+        configFilePath,
+        `${containerName}:${containerConfigPath}`,
+      ], {
+        cwd: rootDir,
+        stdio: "inherit",
+      });
+    } finally {
+      await fs.chmod(configFilePath, 0o600).catch(() => {});
+    }
 
     await runCommand("docker", ["start", containerName], {
       cwd: rootDir,