diff --git a/tests/test-scratch-vm-extension-tw.js b/tests/test-scratch-vm-extension-tw.js
index ff768f3..db24744 100644
--- a/tests/test-scratch-vm-extension-tw.js
+++ b/tests/test-scratch-vm-extension-tw.js
@@ -148,3 +148,7 @@ Scratch.gui.getBlocklyEagerly().then((ScratchBlocks) => {
   ScratchBlocks.getMainWorkspace()?.blockDB_;
   ScratchBlocks.Workspace;
 });
+
+Scratch.vm.runtime.fontManager.on('change', () => {
+
+});
diff --git a/types/scratch-vm.d.ts b/types/scratch-vm.d.ts
index f3f4c4c..d792255 100644
--- a/types/scratch-vm.d.ts
+++ b/types/scratch-vm.d.ts
@@ -57,7 +57,10 @@ declare namespace VM {
     canReadClipboard(): Awaitable<boolean>;
     canNotify(): Awaitable<boolean>;
   }
-  interface FontManager {
+  interface FontManagerEvents {
+    change: [];
+  }
+  interface FontManager extends EventEmitter<FontManagerEvents> {
     runtime: Runtime;
     fonts: Array<{
       system: boolean;