diff --git a/core/test/gather/gatherers/accessibility-test.js b/core/test/gather/gatherers/accessibility-test.js
index 4a6149fcf756..a8e9f994e0b6 100644
--- a/core/test/gather/gatherers/accessibility-test.js
+++ b/core/test/gather/gatherers/accessibility-test.js
@@ -43,6 +43,7 @@ describe('a11y audits + aXe', () => {
 
   before(async () => {
     browser = await puppeteer.launch({
+      headless: 'new',
       executablePath: getChromePath(),
     });
   });
diff --git a/core/test/scenarios/pptr-test-utils.js b/core/test/scenarios/pptr-test-utils.js
index 1130d281ff1b..6140b68a1e24 100644
--- a/core/test/scenarios/pptr-test-utils.js
+++ b/core/test/scenarios/pptr-test-utils.js
@@ -44,32 +44,19 @@ function createTestState() {
     serverBaseUrl: '',
     secondaryServerBaseUrl: '',
 
-    /**
-     * @param {number=} port
-     * @param {number=} secondaryPort
-     */
-    installServerHooks(port = 10200, secondaryPort = 10503) {
+    installSetupAndTeardownHooks() {
       before(async () => {
-        this.server = new Server(port);
-        this.secondaryServer = new Server(secondaryPort);
-        await this.server.listen(port, '127.0.0.1');
-        await this.secondaryServer.listen(secondaryPort, '127.0.0.1');
+        this.server = new Server(10200);
+        this.secondaryServer = new Server(10503);
+        await this.server.listen(10200, '127.0.0.1');
+        await this.secondaryServer.listen(10503, '127.0.0.1');
         this.serverBaseUrl = `http://localhost:${this.server.getPort()}`;
         this.secondaryServerBaseUrl = `http://localhost:${this.secondaryServer.getPort()}`;
       });
 
-      after(async () => {
-        await this.server.close();
-        await this.secondaryServer.close();
-      });
-    },
-
-    installSetupAndTeardownHooks() {
-      this.installServerHooks();
-
       before(async () => {
         this.browser = await puppeteer.launch({
-          headless: true,
+          headless: 'new',
           executablePath: getChromePath(),
           ignoreDefaultArgs: ['--enable-automation'],
         });
@@ -98,6 +85,11 @@ function createTestState() {
       after(async () => {
         await this.browser.close();
       });
+
+      after(async () => {
+        await this.server.close();
+        await this.secondaryServer.close();
+      });
     },
 
     /**
diff --git a/flow-report/test/flow-report-pptr-test.ts b/flow-report/test/flow-report-pptr-test.ts
index 9ffb126a0587..2690da23d15d 100644
--- a/flow-report/test/flow-report-pptr-test.ts
+++ b/flow-report/test/flow-report-pptr-test.ts
@@ -20,7 +20,7 @@ describe('Lighthouse Flow Report', () => {
 
   before(async () => {
     browser = await puppeteer.launch({
-      headless: true,
+      headless: 'new',
       executablePath: getChromePath(),
     });
     page = await browser.newPage();
diff --git a/report/test/renderer/report-renderer-axe-test.js b/report/test/renderer/report-renderer-axe-test.js
index e20c8be9f150..3fa1f18ea63f 100644
--- a/report/test/renderer/report-renderer-axe-test.js
+++ b/report/test/renderer/report-renderer-axe-test.js
@@ -19,6 +19,7 @@ describe('ReportRendererAxe', () => {
 
     before(async () => {
       browser = await puppeteer.launch({
+        headless: 'new',
         executablePath: getChromePath(),
       });
     });
diff --git a/treemap/test/treemap-test-pptr.js b/treemap/test/treemap-test-pptr.js
index 4991cba093a4..4307116ae111 100644
--- a/treemap/test/treemap-test-pptr.js
+++ b/treemap/test/treemap-test-pptr.js
@@ -50,7 +50,7 @@ describe('Lighthouse Treemap', () => {
   beforeEach(async () => {
     if (!browser) {
       browser = await puppeteer.launch({
-        headless: true,
+        headless: 'new',
         executablePath: getChromePath(),
       });
     }
diff --git a/viewer/test/viewer-test-pptr.js b/viewer/test/viewer-test-pptr.js
index 953caa9ee3f1..f6236dcf91ab 100644
--- a/viewer/test/viewer-test-pptr.js
+++ b/viewer/test/viewer-test-pptr.js
@@ -67,7 +67,7 @@ describe('Lighthouse Viewer', () => {
 
     // start puppeteer
     browser = await puppeteer.launch({
-      headless: true,
+      headless: 'new',
       executablePath: getChromePath(),
     });
     viewerPage = await browser.newPage();
@@ -86,6 +86,7 @@ describe('Lighthouse Viewer', () => {
   });
 
   async function ensureNoErrors() {
+    await viewerPage.bringToFront();
     await viewerPage.evaluate(() => new Promise(window.requestAnimationFrame));
     const theErrors = pageErrors;
     pageErrors = [];