diff --git a/addons/xterm-addon-fit/test/FitAddon.api.ts b/addons/xterm-addon-fit/test/FitAddon.api.ts
index 987092ad..c35673cc 100644
--- a/addons/xterm-addon-fit/test/FitAddon.api.ts
+++ b/addons/xterm-addon-fit/test/FitAddon.api.ts
@@ -48,7 +48,7 @@ describe('FitAddon', () => {
     it('default', async function(): Promise<any> {
       await loadFit();
       const dimensions: {cols: number, rows: number} = await page.evaluate(`window.fit.proposeDimensions()`);
-      assert.equal(dimensions.cols, 87);
+      assert.equal(dimensions.cols, 86);
       assert.isAbove(dimensions.rows, 24);
       assert.isBelow(dimensions.rows, 29);
     });
@@ -56,7 +56,7 @@ describe('FitAddon', () => {
     it('width', async function(): Promise<any> {
       await loadFit(1008);
       const dimensions: {cols: number, rows: number} = await page.evaluate(`window.fit.proposeDimensions()`);
-      assert.equal(dimensions.cols, 110);
+      assert.equal(dimensions.cols, 109);
       assert.isAbove(dimensions.rows, 24);
       assert.isBelow(dimensions.rows, 29);
     });
@@ -89,7 +89,7 @@ describe('FitAddon', () => {
       await page.evaluate(`window.fit.fit()`);
       const cols: number = await page.evaluate(`window.term.cols`);
       const rows: number = await page.evaluate(`window.term.rows`);
-      assert.equal(cols, 87);
+      assert.equal(cols, 86);
       assert.isAbove(rows, 24);
       assert.isBelow(rows, 29);
     });
@@ -99,7 +99,7 @@ describe('FitAddon', () => {
       await page.evaluate(`window.fit.fit()`);
       const cols: number = await page.evaluate(`window.term.cols`);
       const rows: number = await page.evaluate(`window.term.rows`);
-      assert.equal(cols, 110);
+      assert.equal(cols, 109);
       assert.isAbove(rows, 24);
       assert.isBelow(rows, 29);
     });
diff --git a/test/api/Terminal.api.ts b/test/api/Terminal.api.ts
index fa19b5b4..72b1ba34 100644
--- a/test/api/Terminal.api.ts
+++ b/test/api/Terminal.api.ts
@@ -726,9 +726,7 @@ describe('API Integration Tests', function(): void {
   describe('registerDecoration', () => {
     describe('bufferDecorations', () => {
       it('should register decorations and render them when terminal open is called', async () => {
-        await page.evaluate(`window.term = new Terminal({ allowProposedApi: true })`);
-        await page.evaluate(`window.term.open(document.querySelector('#terminal-container'))`);
-        await page.waitForSelector('.xterm-text-layer');
+        await openTerminal(page);
         await page.evaluate(`window.marker1 = window.term.registerMarker(1)`);
         await page.evaluate(`window.marker2 = window.term.registerMarker(2)`);
         await page.evaluate(`window.term.registerDecoration({ marker: window.marker1 })`);
@@ -757,9 +755,7 @@ describe('API Integration Tests', function(): void {
     });
     describe('overviewRulerDecorations', () => {
       it('should not add an overview ruler when width is not set', async () => {
-        await page.evaluate(`window.term = new Terminal({ allowProposedApi: true })`);
-        await page.evaluate(`window.term.open(document.querySelector('#terminal-container'))`);
-        await page.waitForSelector('.xterm-text-layer');
+        await openTerminal(page);
         await page.evaluate(`window.marker1 = window.term.registerMarker(1)`);
         await page.evaluate(`window.marker2 = window.term.registerMarker(2)`);
         await page.evaluate(`window.term.registerDecoration({ marker: window.marker1, overviewRulerOptions: { color: 'red', position: 'full' } })`);
@@ -768,9 +764,7 @@ describe('API Integration Tests', function(): void {
         await pollFor(page, `document.querySelectorAll('.xterm-decoration-overview-ruler').length`, 0);
       });
       it('should add an overview ruler when width is set', async () => {
-        await page.evaluate(`window.term = new Terminal({ allowProposedApi: true, overviewRulerWidth: 15 })`);
-        await page.evaluate(`window.term.open(document.querySelector('#terminal-container'))`);
-        await page.waitForSelector('.xterm-text-layer');
+        await openTerminal(page, { overviewRulerWidth: 15 });
         await page.evaluate(`window.marker1 = window.term.registerMarker(1)`);
         await page.evaluate(`window.marker2 = window.term.registerMarker(2)`);
         await page.evaluate(`window.term.registerDecoration({ marker: window.marker1, overviewRulerOptions: { color: 'red', position: 'full' } })`);
diff --git a/test/api/TestUtils.ts b/test/api/TestUtils.ts
index 2b4e96a4..5731009b 100644
--- a/test/api/TestUtils.ts
+++ b/test/api/TestUtils.ts
@@ -64,7 +64,7 @@ export function getBrowserType(): playwright.BrowserType<playwright.WebKitBrowse
   return browserType;
 }
 
-export function launchBrowser() {
+export function launchBrowser(): Promise<playwright.Browser> {
   const browserType = getBrowserType();
   const options: Record<string, unknown> = {
     headless: process.argv.includes('--headless')