diff --git a/services/web/cypress/fixtures/build/mock-writefull-api.js b/services/web/cypress/fixtures/build/mock-writefull-api.js
new file mode 100644
index 0000000000..4ba52ba2c8
--- /dev/null
+++ b/services/web/cypress/fixtures/build/mock-writefull-api.js
@@ -0,0 +1 @@
+module.exports = {}
diff --git a/services/web/cypress/fixtures/build/mock-writefull.css b/services/web/cypress/fixtures/build/mock-writefull.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/services/web/types/window.ts b/services/web/types/window.ts
index c49963f0e6..cef84c0a79 100644
--- a/services/web/types/window.ts
+++ b/services/web/types/window.ts
@@ -52,6 +52,7 @@ declare global {
     writefull?: {
       type: 'extension' | 'integration'
     }
+    WritefullStub?: any
     io?: any
     overleaf: {
       unstable: {