diff --git a/packages/aws-cdk-lib/aws-lambda-nodejs/test/package-manager.test.ts b/packages/aws-cdk-lib/aws-lambda-nodejs/test/package-manager.test.ts
index 1abd310c65e4d..342b399154ac1 100644
--- a/packages/aws-cdk-lib/aws-lambda-nodejs/test/package-manager.test.ts
+++ b/packages/aws-cdk-lib/aws-lambda-nodejs/test/package-manager.test.ts
@@ -52,7 +52,7 @@ test('from a bun.lockb', () => {
   const packageManager = PackageManager.fromLockFile('/path/to/bun.lockb');
   expect(packageManager.lockFile).toEqual(LockFile.BUN);
   expect(packageManager.argsSeparator).toBeUndefined();
-  expect(packageManager.installCommand).toEqual(['bun', 'install', '--frozen-lockfile']);
+  expect(packageManager.installCommand).toEqual(['bun', 'install', '--frozen-lockfile', '--backend', 'copyfile']);
   expect(packageManager.runCommand).toEqual(['bun', 'run']);
 
   expect(packageManager.runBinCommand('my-bin')).toBe('bun run my-bin');
@@ -60,7 +60,7 @@ test('from a bun.lockb', () => {
 
 test('from a bun.lockb with LogLevel.ERROR', () => {
   const packageManager = PackageManager.fromLockFile('/path/to/bun.lockb', LogLevel.ERROR);
-  expect(packageManager.installCommand).toEqual(['bun', 'install', '--frozen-lockfile', '--silent']);
+  expect(packageManager.installCommand).toEqual(['bun', 'install', '--frozen-lockfile', '--backend', 'copyfile', '--silent']);
 });
 
 test('defaults to NPM', () => {