diff --git a/addons/xterm-addon-canvas/test/CanvasRenderer.test.ts b/addons/xterm-addon-canvas/test/CanvasRenderer.test.ts
index b46c813a..76f57394 100644
--- a/addons/xterm-addon-canvas/test/CanvasRenderer.test.ts
+++ b/addons/xterm-addon-canvas/test/CanvasRenderer.test.ts
@@ -17,7 +17,7 @@ test.beforeAll(async ({ browser }) => {
   await openTerminal(ctx);
   ctxWrapper.value = ctx;
   await ctx.page.evaluate(`
-    window.addon = new CanvasAddon(true);
+    window.addon = new window.CanvasAddon(true);
     window.term.loadAddon(window.addon);
   `);
 });
diff --git a/test/playwright/TestUtils.ts b/test/playwright/TestUtils.ts
index 68ef2d69..6bf3eb8f 100644
--- a/test/playwright/TestUtils.ts
+++ b/test/playwright/TestUtils.ts
@@ -363,7 +363,7 @@ export async function openTerminal(ctx: ITestContext, options: ITerminalOptions
   //       assertion catches this case early.
   strictEqual(await ctx.page.evaluate(`document.querySelector('#terminal-container').children.length`), 0, 'there must be no terminals on the page');
   await ctx.page.evaluate(`
-    window.term = new Terminal(${JSON.stringify({ allowProposedApi: true, ...options })});
+    window.term = new window.Terminal(${JSON.stringify({ allowProposedApi: true, ...options })});
     window.term.open(document.querySelector('#terminal-container'));
   `);
   await ctx.page.waitForSelector('.xterm-rows');