diff --git a/test/api/Terminal.api.ts b/test/api/Terminal.api.ts
index 81eaada2..dcaea33e 100644
--- a/test/api/Terminal.api.ts
+++ b/test/api/Terminal.api.ts
@@ -34,7 +34,7 @@ describe('API Integration Tests', function(): void {
 
   // fails with the grapheme injection, not sure why...
   it('Proposed API check', async () => {
-    await openTerminal(page, { allowProposedApi: false });
+    await openTerminal(page, { allowProposedApi: false }, { loadUnicodeGraphemesAddon: false });
     await page.evaluate(`
       try {
         window.term.markers;
diff --git a/test/api/TestUtils.ts b/test/api/TestUtils.ts
index 220bd42c..387eb322 100644
--- a/test/api/TestUtils.ts
+++ b/test/api/TestUtils.ts
@@ -43,18 +43,18 @@ export async function timeout(ms: number): Promise<void> {
   return new Promise<void>(r => setTimeout(r, ms));
 }
 
-export async function openTerminal(page: playwright.Page, options: ITerminalOptions & ITerminalInitOnlyOptions = {}): Promise<void> {
+export async function openTerminal(page: playwright.Page, options: ITerminalOptions & ITerminalInitOnlyOptions = {}, testOptions: any = { loadUnicodeGraphemesAddon: true}): Promise<void> {
   await page.evaluate(`window.term = new Terminal(${JSON.stringify({ allowProposedApi: true, ...options })})`);
   await page.evaluate(`window.term.open(document.querySelector('#terminal-container'))`);
   
-    /*
-  // TODO: make this injection configurable from outside
-  await page.evaluate(`
-    window.unicode = new UnicodeGraphemesAddon();
-    window.term.loadAddon(window.unicode);
-    window.term.unicode.activeVersion = '15-graphemes';
-  `);
-*/
+  // See https://github.com/xtermjs/xterm.js/pull/4519#discussion_r1285234453
+  if (testOptions.loadUnicodeGraphemesAddon) {
+    await page.evaluate(`
+      window.unicode = new UnicodeGraphemesAddon();
+      window.term.loadAddon(window.unicode);
+      window.term.unicode.activeVersion = '15-graphemes';
+    `);
+  }
   await page.waitForSelector('.xterm-rows');
 }