diff --git a/__mocks__/@astral-sh/ruff-wasm-web.js b/__mocks__/@astral-sh/ruff-wasm-web.js
new file mode 100644
index 0000000000..8124c79ba3
--- /dev/null
+++ b/__mocks__/@astral-sh/ruff-wasm-web.js
@@ -0,0 +1,3 @@
+const init = jest.fn();
+export const Workspace = jest.fn();
+export default init;
diff --git a/jest.config.base.cjs b/jest.config.base.cjs
index 1dd7d695f4..07d90e1731 100644
--- a/jest.config.base.cjs
+++ b/jest.config.base.cjs
@@ -65,6 +65,10 @@ module.exports = {
     ),
     // Handle monaco worker files
     '\\.worker.*$': 'identity-obj-proxy',
+    '^@astral-sh/ruff-wasm-web$': path.join(
+      __dirname,
+      './__mocks__/@astral-sh/ruff-wasm-web.js'
+    ),
     // Handle pouchdb modules
     '^pouchdb-browser$': path.join(
       __dirname,