diff --git a/cspell.json b/cspell.json
index 896c40e85388..e7d0d02593dc 100644
--- a/cspell.json
+++ b/cspell.json
@@ -847,6 +847,7 @@
         "workshopping",
         "workspacename",
         "worktree",
+        "worktrees",
         "writeitdown",
         "xcconfig",
         "xcodeproj",
diff --git a/jest.config.js b/jest.config.js
index 1e13b56d427d..2f7c9a810b21 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -19,6 +19,10 @@ module.exports = {
         '<rootDir>/node_modules/@expensify/react-native-live-markdown/lib/commonjs/parseExpensiMark.js',
     ],
     testPathIgnorePatterns: ['<rootDir>/node_modules'],
+    // .worktrees/ holds parallel git worktrees a developer may check out locally.
+    // Each one carries its own modules/hybrid-app/package.json, which trips
+    // jest-haste-map's "duplicate package name" assertion. Skip them entirely.
+    modulePathIgnorePatterns: ['<rootDir>/.worktrees/'],
     globals: {
         __DEV__: true,
         WebSocket: {},