diff --git a/src/plugins/install.npm-spec.test.ts b/src/plugins/install.npm-spec.test.ts
index b678ef7635e..f4f76a20bdb 100644
--- a/src/plugins/install.npm-spec.test.ts
+++ b/src/plugins/install.npm-spec.test.ts
@@ -1,6 +1,5 @@
 import fs from "node:fs";
 import path from "node:path";
-import * as tar from "tar";
 import { afterAll, beforeEach, describe, expect, it, vi } from "vitest";
 import { expectSingleNpmPackIgnoreScriptsCall } from "../test-utils/exec-assertions.js";
 import {
@@ -8,6 +7,7 @@ import {
   mockNpmPackMetadataResult,
 } from "../test-utils/npm-spec-install-test-helpers.js";
 import { installPluginFromNpmSpec, PLUGIN_INSTALL_ERROR_CODE } from "./install.js";
+import { packToArchive } from "./test-helpers/archive-fixtures.js";
 import { createSuiteTempRootTracker } from "./test-helpers/fs-fixtures.js";
 
 const runCommandWithTimeoutMock = vi.fn();
@@ -24,26 +24,6 @@ function readVoiceCallArchiveBuffer(version: string): Buffer {
   return fs.readFileSync(path.join(pluginFixturesDir, `voice-call-${version}.tgz`));
 }
 
-async function packToArchive(params: {
-  pkgDir: string;
-  outDir: string;
-  outName: string;
-  flatRoot?: boolean;
-}) {
-  const dest = path.join(params.outDir, params.outName);
-  fs.rmSync(dest, { force: true });
-  const entries = params.flatRoot ? fs.readdirSync(params.pkgDir) : [path.basename(params.pkgDir)];
-  await tar.c(
-    {
-      gzip: true,
-      file: dest,
-      cwd: params.flatRoot ? params.pkgDir : path.dirname(params.pkgDir),
-    },
-    entries,
-  );
-  return dest;
-}
-
 function buildDynamicArchiveTemplateKey(params: {
   packageJson: Record<string, unknown>;
   withDistIndex: boolean;
diff --git a/src/plugins/install.path.test.ts b/src/plugins/install.path.test.ts
index 799917ee15d..a4fd7f72399 100644
--- a/src/plugins/install.path.test.ts
+++ b/src/plugins/install.path.test.ts
@@ -1,6 +1,5 @@
 import fs from "node:fs";
 import path from "node:path";
-import * as tar from "tar";
 import { afterAll, beforeEach, describe, expect, it, vi } from "vitest";
 import { runCommandWithTimeout } from "../process/exec.js";
 import { expectSingleNpmInstallIgnoreScriptsCall } from "../test-utils/exec-assertions.js";
@@ -11,6 +10,7 @@ import {
   installPluginFromPath,
   PLUGIN_INSTALL_ERROR_CODE,
 } from "./install.js";
+import { packToArchive } from "./test-helpers/archive-fixtures.js";
 import { createSuiteTempRootTracker } from "./test-helpers/fs-fixtures.js";
 
 vi.mock("../process/exec.js", () => ({
@@ -19,26 +19,6 @@ vi.mock("../process/exec.js", () => ({
 
 const suiteTempRootTracker = createSuiteTempRootTracker("openclaw-plugin-install-path");
 
-async function packToArchive(params: {
-  pkgDir: string;
-  outDir: string;
-  outName: string;
-  flatRoot?: boolean;
-}) {
-  const dest = path.join(params.outDir, params.outName);
-  fs.rmSync(dest, { force: true });
-  const entries = params.flatRoot ? fs.readdirSync(params.pkgDir) : [path.basename(params.pkgDir)];
-  await tar.c(
-    {
-      gzip: true,
-      file: dest,
-      cwd: params.flatRoot ? params.pkgDir : path.dirname(params.pkgDir),
-    },
-    entries,
-  );
-  return dest;
-}
-
 function setupBundleInstallFixture(params: {
   bundleFormat: "codex" | "claude" | "cursor";
   name: string;
diff --git a/src/plugins/test-helpers/archive-fixtures.ts b/src/plugins/test-helpers/archive-fixtures.ts
new file mode 100644
index 00000000000..8b0eaa0fef6
--- /dev/null
+++ b/src/plugins/test-helpers/archive-fixtures.ts
@@ -0,0 +1,23 @@
+import fs from "node:fs";
+import path from "node:path";
+import * as tar from "tar";
+
+export async function packToArchive(params: {
+  pkgDir: string;
+  outDir: string;
+  outName: string;
+  flatRoot?: boolean;
+}) {
+  const dest = path.join(params.outDir, params.outName);
+  fs.rmSync(dest, { force: true });
+  const entries = params.flatRoot ? fs.readdirSync(params.pkgDir) : [path.basename(params.pkgDir)];
+  await tar.c(
+    {
+      gzip: true,
+      file: dest,
+      cwd: params.flatRoot ? params.pkgDir : path.dirname(params.pkgDir),
+    },
+    entries,
+  );
+  return dest;
+}