diff --git a/packages/playwright-test/src/common/compilationCache.ts b/packages/playwright-test/src/common/compilationCache.ts
index 9f438266fd87b..9d8b4a1977cd6 100644
--- a/packages/playwright-test/src/common/compilationCache.ts
+++ b/packages/playwright-test/src/common/compilationCache.ts
@@ -19,6 +19,7 @@ import fs from 'fs';
 import os from 'os';
 import path from 'path';
 import { sourceMapSupport } from '../utilsBundle';
+import { sanitizeForFilePath } from '../util';
 
 export type MemoryCache = {
   codePath: string;
@@ -27,7 +28,11 @@ export type MemoryCache = {
 };
 
 const version = 13;
-const cacheDir = process.env.PWTEST_CACHE_DIR || path.join(os.tmpdir(), 'playwright-transform-cache');
+
+const DEFAULT_CACHE_DIR_WIN32 = path.join(os.tmpdir(), `playwright-transform-cache`);
+const DEFAULT_CACHE_DIR_POSIX = path.join(os.tmpdir(), `playwright-transform-cache-` + sanitizeForFilePath(os.userInfo().username));
+
+const cacheDir = process.env.PWTEST_CACHE_DIR || (process.platform === 'win32' ? DEFAULT_CACHE_DIR_WIN32 : DEFAULT_CACHE_DIR_POSIX);
 
 const sourceMaps: Map<string, string> = new Map();
 const memoryCache = new Map<string, MemoryCache>();