diff --git a/tests/cli-generate-cli.integration.test.ts b/tests/cli-generate-cli.integration.test.ts
index 5ad4a76..820bf7d 100644
--- a/tests/cli-generate-cli.integration.test.ts
+++ b/tests/cli-generate-cli.integration.test.ts
@@ -17,10 +17,11 @@ const testRequire = createRequire(import.meta.url);
 const MCP_SERVER_MODULE = pathToFileURL(testRequire.resolve('@modelcontextprotocol/sdk/server/mcp.js')).href;
 const STDIO_SERVER_MODULE = pathToFileURL(testRequire.resolve('@modelcontextprotocol/sdk/server/stdio.js')).href;
 const ZOD_MODULE = pathToFileURL(path.join(process.cwd(), 'node_modules', 'zod', 'index.js')).href;
+const PNPM_COMMAND = process.platform === 'win32' ? 'pnpm.cmd' : 'pnpm';
 
 async function ensureDistBuilt(): Promise<void> {
   await new Promise<void>((resolve, reject) => {
-    execFile('pnpm', ['build'], { cwd: process.cwd(), env: process.env }, (error) => {
+    execFile(PNPM_COMMAND, ['build'], { cwd: process.cwd(), env: process.env }, (error) => {
       if (error) {
         reject(error);
         return;
diff --git a/tests/daemon.integration.test.ts b/tests/daemon.integration.test.ts
index 7dc5608..f6102dc 100644
--- a/tests/daemon.integration.test.ts
+++ b/tests/daemon.integration.test.ts
@@ -12,6 +12,7 @@ const MCP_SERVER_MODULE = pathToFileURL(testRequire.resolve('@modelcontextprotoc
 const STDIO_SERVER_MODULE = pathToFileURL(testRequire.resolve('@modelcontextprotocol/sdk/server/stdio.js')).href;
 const ZOD_MODULE = pathToFileURL(testRequire.resolve('zod')).href;
 const describeDaemon = process.platform === 'win32' ? describe.skip : describe;
+const PNPM_COMMAND = process.platform === 'win32' ? 'pnpm.cmd' : 'pnpm';
 
 async function readFileWithRetries(filePath: string, retries = 20, delayMs = 100): Promise<string> {
   let lastError: unknown;
@@ -34,7 +35,7 @@ async function ensureDistBuilt(): Promise<void> {
     await fs.access(CLI_ENTRY);
   } catch {
     await new Promise<void>((resolve, reject) => {
-      execFile('pnpm', ['build'], { cwd: process.cwd(), env: process.env }, (error) => {
+      execFile(PNPM_COMMAND, ['build'], { cwd: process.cwd(), env: process.env }, (error) => {
         if (error) {
           reject(error);
           return;
diff --git a/tests/stdio-servers.integration.test.ts b/tests/stdio-servers.integration.test.ts
index 0dbfd6a..4ab0a8b 100644
--- a/tests/stdio-servers.integration.test.ts
+++ b/tests/stdio-servers.integration.test.ts
@@ -7,13 +7,14 @@ import { fileURLToPath } from 'node:url';
 import { afterAll, beforeAll, describe, expect, it } from 'vitest';
 
 const CLI_ENTRY = fileURLToPath(new URL('../dist/cli.js', import.meta.url));
+const PNPM_COMMAND = process.platform === 'win32' ? 'pnpm.cmd' : 'pnpm';
 
 async function ensureDistBuilt(): Promise<void> {
   try {
     await fs.access(CLI_ENTRY);
   } catch {
     await new Promise<void>((resolve, reject) => {
-      execFile('pnpm', ['build'], { cwd: process.cwd(), env: process.env }, (error) => {
+      execFile(PNPM_COMMAND, ['build'], { cwd: process.cwd(), env: process.env }, (error) => {
         if (error) {
           reject(error);
           return;