diff --git a/package.json b/package.json
index 98af68f200..82d78d3310 100644
--- a/package.json
+++ b/package.json
@@ -171,7 +171,8 @@
       "decoderWorker\\.min\\.wasm": "<rootDir>/node_modules/matrix-react-sdk/__mocks__/empty.js",
       "waveWorker\\.min\\.js": "<rootDir>/node_modules/matrix-react-sdk/__mocks__/empty.js",
       "context-filter-polyfill": "<rootDir>/node_modules/matrix-react-sdk/__mocks__/empty.js",
-      "FontManager.ts": "<rootDir>/node_modules/matrix-react-sdk/__mocks__/FontManager.js"
+      "FontManager.ts": "<rootDir>/node_modules/matrix-react-sdk/__mocks__/FontManager.js",
+      "workers/(.+)\\.worker\\.ts": "<rootDir>/node_modules/matrix-react-sdk/__mocks__/workerMock.js"
     },
     "transformIgnorePatterns": [
       "/node_modules/(?!matrix-js-sdk).+$",