diff --git a/.eslintignore b/.eslintignore
index 219565741c..d148adc291 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -14,8 +14,5 @@ front_end/protocol_externs.js
 front_end/javascript_metadata/NativeFunctions.js
 front_end/sdk/wasm_source_map/pkg/wasm_source_map.js
 front_end/third_party/
-test/e2e/resources/
-test/webtests/
-scripts/
 test/e2e/**/*.js
 test/shared/**/*.js
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 58b1101f6a..f9b734a693 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -116,29 +116,7 @@ def _CheckFormat(input_api, output_api):
     def popen(args):
         return input_api.subprocess.Popen(args=args, stdout=input_api.subprocess.PIPE, stderr=input_api.subprocess.STDOUT)
 
-    affected_files = _getAffectedJSFiles(input_api)
-    if len(affected_files) == 0:
-        return results
-    original_sys_path = sys.path
-    try:
-        sys.path = sys.path + [input_api.os_path.join(input_api.PresubmitLocalPath(), 'scripts')]
-        import devtools_paths
-    finally:
-        sys.path = original_sys_path
-
-    ignore_files = []
-    eslint_ignore_path = input_api.os_path.join(input_api.PresubmitLocalPath(), '.eslintignore')
-    with open(eslint_ignore_path, 'r') as ignore_manifest:
-        for line in ignore_manifest:
-            if '*' not in line.strip():
-                ignore_files.append(input_api.os_path.normpath(line.strip()))
-    formattable_files = [
-        affected_file for affected_file in affected_files if all(ignore_file not in affected_file for ignore_file in ignore_files)
-    ]
-    if len(formattable_files) == 0:
-        return results
-
-    format_args = ['git', 'cl', 'format', '--js'] + formattable_files
+    format_args = ['git', 'cl', 'format', '--js']
     format_process = popen(format_args)
     format_out, _ = format_process.communicate()
     if format_process.returncode != 0:
diff --git a/front_end/cm/.clang-format b/front_end/cm/.clang-format
new file mode 100644
index 0000000000..37f3d57668
--- /dev/null
+++ b/front_end/cm/.clang-format
@@ -0,0 +1 @@
+DisableFormat: true
\ No newline at end of file
diff --git a/front_end/cm_headless/.clang-format b/front_end/cm_headless/.clang-format
new file mode 100644
index 0000000000..37f3d57668
--- /dev/null
+++ b/front_end/cm_headless/.clang-format
@@ -0,0 +1 @@
+DisableFormat: true
\ No newline at end of file
diff --git a/front_end/cm_modes/.clang-format b/front_end/cm_modes/.clang-format
new file mode 100644
index 0000000000..37f3d57668
--- /dev/null
+++ b/front_end/cm_modes/.clang-format
@@ -0,0 +1 @@
+DisableFormat: true
\ No newline at end of file
diff --git a/front_end/cm_web_modes/.clang-format b/front_end/cm_web_modes/.clang-format
new file mode 100644
index 0000000000..37f3d57668
--- /dev/null
+++ b/front_end/cm_web_modes/.clang-format
@@ -0,0 +1 @@
+DisableFormat: true
\ No newline at end of file
diff --git a/front_end/diff/.clang-format b/front_end/diff/.clang-format
new file mode 100644
index 0000000000..37f3d57668
--- /dev/null
+++ b/front_end/diff/.clang-format
@@ -0,0 +1 @@
+DisableFormat: true
\ No newline at end of file
diff --git a/front_end/formatter_worker/acorn/.clang-format b/front_end/formatter_worker/acorn/.clang-format
new file mode 100644
index 0000000000..37f3d57668
--- /dev/null
+++ b/front_end/formatter_worker/acorn/.clang-format
@@ -0,0 +1 @@
+DisableFormat: true
\ No newline at end of file
diff --git a/front_end/sdk/wasm_source_map/.clang-format b/front_end/sdk/wasm_source_map/.clang-format
new file mode 100644
index 0000000000..37f3d57668
--- /dev/null
+++ b/front_end/sdk/wasm_source_map/.clang-format
@@ -0,0 +1 @@
+DisableFormat: true
\ No newline at end of file
diff --git a/front_end/third_party/.clang-format b/front_end/third_party/.clang-format
new file mode 100644
index 0000000000..37f3d57668
--- /dev/null
+++ b/front_end/third_party/.clang-format
@@ -0,0 +1 @@
+DisableFormat: true
\ No newline at end of file
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/application-panel/clear-storage-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/application-panel/clear-storage-a11y-test.js
index b640b8d9bd..71f2ea0775 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/application-panel/clear-storage-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/application-panel/clear-storage-a11y-test.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 (async function() {
-  TestRunner.addResult(`Tests accessibility in the Clear Storage view using the axe-core linter.`);
+  TestRunner.addResult('Tests accessibility in the Clear Storage view using the axe-core linter.');
   await TestRunner.loadModule('application_test_runner');
   await TestRunner.loadModule('axe_core_test_runner');
   await ApplicationTestRunner.resetState();
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/application-panel/service-worker-view-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/application-panel/service-worker-view-a11y-test.js
index 341f699545..35b37fae34 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/application-panel/service-worker-view-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/application-panel/service-worker-view-a11y-test.js
@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 (async function() {
-  TestRunner.addResult(`Tests accessibility of ServiceWorkersView on application panel.`);
+  TestRunner.addResult('Tests accessibility of ServiceWorkersView on application panel.');
   await TestRunner.loadModule('axe_core_test_runner');
   await TestRunner.loadModule('application_test_runner');
   await ApplicationTestRunner.resetState();
@@ -22,4 +22,4 @@
 
   await AxeCoreTestRunner.runValidation(element);
   TestRunner.completeTest();
-})();
\ No newline at end of file
+})();
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/basic-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/basic-a11y-test.js
index 59cbeba977..dff5de4203 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/basic-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/basic-a11y-test.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(async function () {
+(async function() {
   await TestRunner.loadModule('axe_core_test_runner');
   const locationsToTest =
     [
@@ -14,13 +14,14 @@
       'sensors',
     ];
 
-  //TODO(crbug.com/1004940): exclude scrollable-region-focusable for performance.monitor only
+  // TODO(crbug.com/1004940): exclude scrollable-region-focusable for performance.monitor only
   const NO_SCROLLABLE_REGION_FOCUSABLE_RULESET = {
     'scrollable-region-focusable': { enabled: false, },
   };
 
-  for (const location of locationsToTest)
+  for (const location of locationsToTest) {
     await loadViewAndTestElementViolations(location);
+  }
 
   TestRunner.completeTest();
 
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/elements/main-tool-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/elements/main-tool-test.js
index 10da2f1b34..8e2d1ee023 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/elements/main-tool-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/elements/main-tool-test.js
@@ -2,62 +2,62 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(async function () {
-    // axe-core issue #1444 -- role="tree" requires children with role="treeitem",
-    // but it is reasonable to have trees with no leaves.
-    const NO_REQUIRED_CHILDREN_RULESET = {
-      'aria-required-children': {
-        enabled: false,
-      },
-    };
-    const DEFAULT_RULESET = { };
-    await TestRunner.loadModule('axe_core_test_runner');
-    await TestRunner.loadModule('elements_test_runner');
-    const tests = [
-      testElementsDomTree,
-      testElementsDomBreadcrumbs,
-      testElementsStylesPane,
-      testElementsComputedStylesPane,
-    ];
+(async function() {
+  // axe-core issue #1444 -- role="tree" requires children with role="treeitem",
+  // but it is reasonable to have trees with no leaves.
+  const NO_REQUIRED_CHILDREN_RULESET = {
+    'aria-required-children': {
+      enabled: false,
+    },
+  };
+  const DEFAULT_RULESET = {};
+  await TestRunner.loadModule('axe_core_test_runner');
+  await TestRunner.loadModule('elements_test_runner');
+  const tests = [
+    testElementsDomTree,
+    testElementsDomBreadcrumbs,
+    testElementsStylesPane,
+    testElementsComputedStylesPane,
+  ];
 
-    async function testElementsDomTree() {
-      TestRunner.addResult('Tests accessibility in the DOM tree using the axe-core linter');
-      const view = 'elements';
-      await UI.viewManager.showView(view);
-      const widget = await UI.viewManager.view(view).widget();
-      const element = widget.element.querySelector('#elements-content');
+  async function testElementsDomTree() {
+    TestRunner.addResult('Tests accessibility in the DOM tree using the axe-core linter');
+    const view = 'elements';
+    await UI.viewManager.showView(view);
+    const widget = await UI.viewManager.view(view).widget();
+    const element = widget.element.querySelector('#elements-content');
 
-      await AxeCoreTestRunner.runValidation(element, NO_REQUIRED_CHILDREN_RULESET);
-    }
+    await AxeCoreTestRunner.runValidation(element, NO_REQUIRED_CHILDREN_RULESET);
+  }
 
-    async function testElementsDomBreadcrumbs() {
-      TestRunner.addResult('Tests accessibility in the DOM breadcrumbs using the axe-core linter');
-      const view = 'elements';
-      await UI.viewManager.showView(view);
-      const widget = await UI.viewManager.view(view).widget();
-      const element = widget.element.querySelector('#elements-crumbs');
+  async function testElementsDomBreadcrumbs() {
+    TestRunner.addResult('Tests accessibility in the DOM breadcrumbs using the axe-core linter');
+    const view = 'elements';
+    await UI.viewManager.showView(view);
+    const widget = await UI.viewManager.view(view).widget();
+    const element = widget.element.querySelector('#elements-crumbs');
 
-      await AxeCoreTestRunner.runValidation(element, DEFAULT_RULESET);
-    }
+    await AxeCoreTestRunner.runValidation(element, DEFAULT_RULESET);
+  }
 
-    async function testElementsStylesPane() {
-      TestRunner.addResult('Tests accessibility of the Styles pane using the axe-core linter');
-      await UI.viewManager.showView('elements');
-      const panel = self.runtime.sharedInstance(Elements.ElementsPanel);
-      const element = panel._stylesWidget.element;
+  async function testElementsStylesPane() {
+    TestRunner.addResult('Tests accessibility of the Styles pane using the axe-core linter');
+    await UI.viewManager.showView('elements');
+    const panel = self.runtime.sharedInstance(Elements.ElementsPanel);
+    const element = panel._stylesWidget.element;
 
-      await AxeCoreTestRunner.runValidation(element, NO_REQUIRED_CHILDREN_RULESET);
-    }
+    await AxeCoreTestRunner.runValidation(element, NO_REQUIRED_CHILDREN_RULESET);
+  }
 
-    async function testElementsComputedStylesPane() {
-      TestRunner.addResult('Tests accessibility in the Computed Styles pane using the axe-core linter');
-      await UI.viewManager.showView('elements');
-      await ElementsTestRunner.showComputedStyles();
-      const panel = self.runtime.sharedInstance(Elements.ElementsPanel);
-      const element = panel._computedStyleWidget.element;
+  async function testElementsComputedStylesPane() {
+    TestRunner.addResult('Tests accessibility in the Computed Styles pane using the axe-core linter');
+    await UI.viewManager.showView('elements');
+    await ElementsTestRunner.showComputedStyles();
+    const panel = self.runtime.sharedInstance(Elements.ElementsPanel);
+    const element = panel._computedStyleWidget.element;
 
-      await AxeCoreTestRunner.runValidation(element, DEFAULT_RULESET);
-    }
+    await AxeCoreTestRunner.runValidation(element, DEFAULT_RULESET);
+  }
 
-    TestRunner.runAsyncTestSuite(tests);
-  })();
\ No newline at end of file
+  TestRunner.runAsyncTestSuite(tests);
+})();
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/lighthouse-start-view-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/lighthouse-start-view-a11y-test.js
index 93a3d6bc0c..2b22ab216b 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/lighthouse-start-view-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/lighthouse-start-view-a11y-test.js
@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(async function () {
-    TestRunner.addResult('Tests accessibility in the lighthouse start view using the axe-core linter.\n');
-    await TestRunner.loadModule('axe_core_test_runner');
-    await TestRunner.loadModule('lighthouse_test_runner');
-    await TestRunner.showPanel('lighthouse');
-    await AxeCoreTestRunner.runValidation(LighthouseTestRunner.getContainerElement());
-    TestRunner.completeTest();
+(async function() {
+  TestRunner.addResult('Tests accessibility in the lighthouse start view using the axe-core linter.\n');
+  await TestRunner.loadModule('axe_core_test_runner');
+  await TestRunner.loadModule('lighthouse_test_runner');
+  await TestRunner.showPanel('lighthouse');
+  await AxeCoreTestRunner.runValidation(LighthouseTestRunner.getContainerElement());
+  TestRunner.completeTest();
 })();
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/memory/heap-profiler-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/memory/heap-profiler-a11y-test.js
index 33175c6d8b..67f1c49a98 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/memory/heap-profiler-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/memory/heap-profiler-a11y-test.js
@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 (async function() {
-  TestRunner.addResult(`Tests accessibility in heap profiler using the axe-core linter.`);
+  TestRunner.addResult('Tests accessibility in heap profiler using the axe-core linter.');
   await TestRunner.loadModule('axe_core_test_runner');
   await TestRunner.loadModule('heap_profiler_test_runner');
   await TestRunner.showPanel('heap_profiler');
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/network/network-condition-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/network/network-condition-a11y-test.js
index 6e6699b8f6..bb610e248f 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/network/network-condition-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/network/network-condition-a11y-test.js
@@ -12,4 +12,4 @@
   await AxeCoreTestRunner.runValidation(widget.element);
 
   TestRunner.completeTest();
-})();
\ No newline at end of file
+})();
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/performance/landing-page-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/performance/landing-page-a11y-test.js
index 982b291b08..6a749abdf6 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/performance/landing-page-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/performance/landing-page-a11y-test.js
@@ -12,4 +12,4 @@
   await AxeCoreTestRunner.runValidation(widget.element);
 
   TestRunner.completeTest();
-})();
\ No newline at end of file
+})();
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/performance/performance-pane-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/performance/performance-pane-a11y-test.js
index c266c9c987..4bd099a236 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/performance/performance-pane-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/performance/performance-pane-a11y-test.js
@@ -41,7 +41,7 @@
       PerformanceTestRunner.createPerformanceModelWithEvents(testData);
 
   async function testDetailsView() {
-    TestRunner.addResult(`Tests accessibility in performance Details view using the axe-core linter`);
+    TestRunner.addResult('Tests accessibility in performance Details view using the axe-core linter');
     const detailsView = runtime.sharedInstance(Timeline.TimelineDetailsView);
 
     // Details pane gets data from the parent TimelineDetails view
@@ -82,4 +82,4 @@
     testBottomUpView,
     testCallTreeView,
   ]);
-})();
\ No newline at end of file
+})();
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/quick-open-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/quick-open-a11y-test.js
index ce0aea3f4b..e30b7596f0 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/quick-open-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/quick-open-a11y-test.js
@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 (async function() {
-  TestRunner.addResult(`Test accessibility in Quick Open dialog\n`);
+  TestRunner.addResult('Test accessibility in Quick Open dialog\n');
   await self.runtime.loadModulePromise('quick_open');
   await TestRunner.loadModule('axe_core_test_runner');
 
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/rendering/basic-rendering-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/rendering/basic-rendering-a11y-test.js
index a171697ef4..1dbd5b4207 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/rendering/basic-rendering-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/rendering/basic-rendering-a11y-test.js
@@ -2,10 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(async function () {
+(async function() {
   await TestRunner.loadModule('axe_core_test_runner');
 
-  TestRunner.addResult(`Tests accessibility in the rendering view using the axe-core linter.`);
+  TestRunner.addResult('Tests accessibility in the rendering view using the axe-core linter.');
   await UI.viewManager.showView('rendering');
   const renderingView = await UI.viewManager.view('rendering').widget();
   await AxeCoreTestRunner.runValidation(renderingView.element);
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/security/security-origin-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/security/security-origin-a11y-test.js
index 65a904f002..a4cc9d9f35 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/security/security-origin-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/security/security-origin-a11y-test.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(async function () {
+(async function() {
   await TestRunner.loadModule('security_test_runner');
   await TestRunner.loadModule('axe_core_test_runner');
   await TestRunner.showPanel('security');
@@ -29,7 +29,7 @@
   SecurityTestRunner.dispatchRequestFinished(request1);
   const securityPanel = runtime.sharedInstance(Security.SecurityPanel);
 
-  securityPanel.showOrigin("https://foo.test");
+  securityPanel.showOrigin('https://foo.test');
   await AxeCoreTestRunner.runValidation(securityPanel.contentElement);
 
   TestRunner.completeTest();
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/settings/blackbox-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/settings/blackbox-a11y-test.js
index 4e6a192e92..2db715ca65 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/settings/blackbox-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/settings/blackbox-a11y-test.js
@@ -39,4 +39,4 @@
   }
 
   TestRunner.runAsyncTestSuite([testAddPattern, testPatternList, testPatternError]);
-})();
\ No newline at end of file
+})();
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/settings/emulated-device-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/settings/emulated-device-a11y-test.js
index a6910f8138..20efb2181d 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/settings/emulated-device-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/settings/emulated-device-a11y-test.js
@@ -11,7 +11,7 @@
     const addDeviceButton = devicesWidget._defaultFocusedElement;
     addDeviceButton.click();
 
-    TestRunner.addResult(`Invalidating the device pixel ratio`);
+    TestRunner.addResult('Invalidating the device pixel ratio');
     const editor = devicesWidget._list._editor;
     const title = editor.control('title');
     const width = editor.control('width');
@@ -28,4 +28,4 @@
   }
 
   TestRunner.runAsyncTestSuite([testNewDeviceError]);
-})();
\ No newline at end of file
+})();
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/settings/geolocations-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/settings/geolocations-a11y-test.js
index 84835375ee..40e54591a8 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/settings/geolocations-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/settings/geolocations-a11y-test.js
@@ -51,4 +51,4 @@
   }
 
   TestRunner.runAsyncTestSuite([testAddLocation, testNewLocationError]);
-})();
\ No newline at end of file
+})();
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/settings/shortcuts-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/settings/shortcuts-a11y-test.js
index 29bdeba807..84d653b98f 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/settings/shortcuts-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/settings/shortcuts-a11y-test.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(async function () {
+(async function() {
   TestRunner.addResult('Tests accessibility in the settings tool shortcuts pane using the axe-core linter.');
   await TestRunner.loadModule('axe_core_test_runner');
 
@@ -18,4 +18,4 @@
   }
 
   TestRunner.runAsyncTestSuite([testShortcuts]);
-})();
\ No newline at end of file
+})();
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/sources/global-listeners-sidebar-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/sources/global-listeners-sidebar-a11y-test.js
index 4069fa02e5..02811a7ded 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/sources/global-listeners-sidebar-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/sources/global-listeners-sidebar-a11y-test.js
@@ -10,7 +10,7 @@
   await TestRunner.navigatePromise('../sources/debugger-breakpoints/resources/dom-breakpoints.html');
 
   TestRunner.addResult('Adding global listener.');
-  await TestRunner.evaluateInPagePromise(`window.addEventListener('touchstart', () => console.log);`);
+  await TestRunner.evaluateInPagePromise('window.addEventListener(\'touchstart\', () => console.log);');
   await UI.viewManager.showView('sources.globalListeners');
   const globalListenersPane = self.runtime.sharedInstance(BrowserDebugger.ObjectEventListenersSidebarPane);
   const eventListenersView = globalListenersPane._eventListenersView;
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/sources/javascript-breakpoints-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/sources/javascript-breakpoints-a11y-test.js
index a8be4dd021..bfca3566bc 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/sources/javascript-breakpoints-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/sources/javascript-breakpoints-a11y-test.js
@@ -12,8 +12,8 @@
   const sourceFrame = await SourcesTestRunner.showScriptSourcePromise('set-breakpoint.html');
 
   TestRunner.addResult('Setting a breakpoint.');
-  await SourcesTestRunner.createNewBreakpoint(sourceFrame, 13, '', true)
-  await SourcesTestRunner.createNewBreakpoint(sourceFrame, 11, '', false)
+  await SourcesTestRunner.createNewBreakpoint(sourceFrame, 13, '', true);
+  await SourcesTestRunner.createNewBreakpoint(sourceFrame, 11, '', false);
   await UI.viewManager.showView('sources.jsBreakpoints');
   const breakpointsPaneElement = runtime.sharedInstance(Sources.JavaScriptBreakpointsSidebarPane).contentElement;
 
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-contentscripts-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-contentscripts-a11y-test.js
index 5df6ba3ddd..5475147498 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-contentscripts-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-contentscripts-a11y-test.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(async function () {
+(async function() {
   TestRunner.addResult('Tests accessibility in the Sources panel Navigator pane Contentscripts tab using axe-core.');
 
   // axe-core issue #1444 -- role="tree" requires children with role="treeitem",
@@ -26,11 +26,11 @@
 
   async function setup() {
     // Add content scripts
-    var pageMock = new SDKTestRunner.PageMock('http://example.com');
+    const pageMock = new SDKTestRunner.PageMock('http://example.com');
     pageMock.connectAsMainTarget('page-target');
     const url = 'contentScript1.js';
     pageMock.evalScript(url, 'var script', true /* isContentScript */);
-    await TestRunner.waitForUISourceCode(url)
+    await TestRunner.waitForUISourceCode(url);
   }
 
   async function testA11yForView(ruleSet) {
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-filesystem-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-filesystem-a11y-test.js
index 17cb15f810..e5d0205560 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-filesystem-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-filesystem-a11y-test.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(async function () {
+(async function() {
   TestRunner.addResult('Tests accessibility in the Sources panel Navigator pane FileSystem tab using axe-core.');
 
   // axe-core issue #1444 -- role="tree" requires children with role="treeitem",
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-network-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-network-a11y-test.js
index 84864223da..09ea637693 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-network-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-network-a11y-test.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(async function () {
+(async function() {
   TestRunner.addResult('Tests accessibility in the Sources panel Navigator pane Network tab using axe-core.');
 
   // axe-core issue #1444 -- role="tree" requires children with role="treeitem",
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-overrides-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-overrides-a11y-test.js
index 695dea6c8b..4f007d5a13 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-overrides-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-overrides-a11y-test.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(async function () {
+(async function() {
   TestRunner.addResult('Tests accessibility in the Sources panel Navigator pane Overrides tab using axe-core.');
 
   // axe-core issue #1444 -- role="tree" requires children with role="treeitem",
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-snippets-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-snippets-a11y-test.js
index 0a1c6e97f8..389dc281ac 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-snippets-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/sources/source-navigator-snippets-a11y-test.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(async function () {
+(async function() {
   TestRunner.addResult('Tests accessibility in the Sources panel Navigator pane Snippets tab using axe-core.');
 
   // axe-core issue #1444 -- role="tree" requires children with role="treeitem",
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/sources/sources-editor-pane-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/sources/sources-editor-pane-a11y-test.js
index edea7c3439..85035c9bec 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/sources/sources-editor-pane-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/sources/sources-editor-pane-a11y-test.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(async function () {
+(async function() {
   TestRunner.addResult('Tests accessibility in the editor pane in sources panel using the axe-core linter.');
 
   // axe-core issue #1444 -- role="tree" requires children with role="treeitem",
diff --git a/test/webtests/http/tests/devtools/a11y-axe-core/sources/xhr-breakpoints-sidebar-a11y-test.js b/test/webtests/http/tests/devtools/a11y-axe-core/sources/xhr-breakpoints-sidebar-a11y-test.js
index 97d840104b..19dbed4e24 100644
--- a/test/webtests/http/tests/devtools/a11y-axe-core/sources/xhr-breakpoints-sidebar-a11y-test.js
+++ b/test/webtests/http/tests/devtools/a11y-axe-core/sources/xhr-breakpoints-sidebar-a11y-test.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(async function () {
+(async function() {
   await TestRunner.loadModule('axe_core_test_runner');
   await TestRunner.showPanel('sources');
 
diff --git a/test/webtests/http/tests/devtools/console/console-eval-uses-repl-mode.js b/test/webtests/http/tests/devtools/console/console-eval-uses-repl-mode.js
index 93c7d8e484..02ec2ec99b 100644
--- a/test/webtests/http/tests/devtools/console/console-eval-uses-repl-mode.js
+++ b/test/webtests/http/tests/devtools/console/console-eval-uses-repl-mode.js
@@ -3,13 +3,13 @@
 // found in the LICENSE file.
 
 (async function() {
-  TestRunner.addResult(`Tests that console inputs are evaluated in REPL mode\n`);
+  TestRunner.addResult('Tests that console inputs are evaluated in REPL mode\n');
 
   await TestRunner.loadModule('console_test_runner');
   await TestRunner.showPanel('console');
 
-  TestRunner.addSniffer(TestRunner.RuntimeAgent, "invoke_evaluate", function(args) {
-    TestRunner.addResult("Called RuntimeAgent.invoke_evaluate");
+  TestRunner.addSniffer(TestRunner.RuntimeAgent, 'invoke_evaluate', function(args) {
+    TestRunner.addResult('Called RuntimeAgent.invoke_evaluate');
     TestRunner.addResult("Value of 'replMode': " + args.replMode);
   });
 
diff --git a/test/webtests/http/tests/devtools/lighthouse/lighthouse-emulate-run.js b/test/webtests/http/tests/devtools/lighthouse/lighthouse-emulate-run.js
index 36984564d3..82d73e7b19 100644
--- a/test/webtests/http/tests/devtools/lighthouse/lighthouse-emulate-run.js
+++ b/test/webtests/http/tests/devtools/lighthouse/lighthouse-emulate-run.js
@@ -13,7 +13,7 @@
   LighthouseTestRunner.getRunButton().click();
   const {artifacts, lhr} = await LighthouseTestRunner.waitForResults();
 
-  TestRunner.addResult(`\n=============== Lighthouse Results ===============`);
+  TestRunner.addResult('\n=============== Lighthouse Results ===============');
   TestRunner.addResult(`URL: ${lhr.finalUrl}`);
   TestRunner.addResult(`Version: ${lhr.lighthouseVersion}`);
   TestRunner.addResult(`TestedAsMobileDevice: ${artifacts.TestedAsMobileDevice}`);
diff --git a/test/webtests/http/tests/devtools/lighthouse/lighthouse-export-run.js b/test/webtests/http/tests/devtools/lighthouse/lighthouse-export-run.js
index a6b425c6ee..4f3eeb6163 100644
--- a/test/webtests/http/tests/devtools/lighthouse/lighthouse-export-run.js
+++ b/test/webtests/http/tests/devtools/lighthouse/lighthouse-export-run.js
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-(async function () {
+(async function() {
   TestRunner.addResult('Tests that exporting works.\n');
   await TestRunner.navigatePromise('resources/lighthouse-basic.html');
 
diff --git a/test/webtests/http/tests/devtools/lighthouse/lighthouse-flags-run.js b/test/webtests/http/tests/devtools/lighthouse/lighthouse-flags-run.js
index 5b604e7e77..4a8282f955 100644
--- a/test/webtests/http/tests/devtools/lighthouse/lighthouse-flags-run.js
+++ b/test/webtests/http/tests/devtools/lighthouse/lighthouse-flags-run.js
@@ -20,7 +20,7 @@
   LighthouseTestRunner.getRunButton().click();
 
   const {artifacts, lhr} = await LighthouseTestRunner.waitForResults();
-  TestRunner.addResult(`\n=============== Lighthouse Results ===============`);
+  TestRunner.addResult('\n=============== Lighthouse Results ===============');
   TestRunner.addResult(`emulatedFormFactor: ${lhr.configSettings.emulatedFormFactor}`);
   TestRunner.addResult(`disableStorageReset: ${lhr.configSettings.disableStorageReset}`);
   TestRunner.addResult(`throttlingMethod: ${lhr.configSettings.throttlingMethod}`);
diff --git a/test/webtests/http/tests/devtools/lighthouse/lighthouse-limited-run.js b/test/webtests/http/tests/devtools/lighthouse/lighthouse-limited-run.js
index 7cedcaa9ad..3ded6f9978 100644
--- a/test/webtests/http/tests/devtools/lighthouse/lighthouse-limited-run.js
+++ b/test/webtests/http/tests/devtools/lighthouse/lighthouse-limited-run.js
@@ -13,17 +13,20 @@
   const checkboxes = containerElement.querySelectorAll('.checkbox');
   for (const checkbox of checkboxes) {
     if (checkbox.textElement.textContent === 'Progressive Web App' ||
-        checkbox.textElement.textContent === 'Clear storage')
+        checkbox.textElement.textContent === 'Clear storage') {
       continue;
+    }
 
-    if (checkbox.checkboxElement.checked) checkbox.checkboxElement.click();
+    if (checkbox.checkboxElement.checked) {
+      checkbox.checkboxElement.click();
+    }
   }
 
   LighthouseTestRunner.dumpStartAuditState();
   LighthouseTestRunner.getRunButton().click();
 
   const {lhr} = await LighthouseTestRunner.waitForResults();
-  TestRunner.addResult(`\n=============== Audits run ===============`);
+  TestRunner.addResult('\n=============== Audits run ===============');
   TestRunner.addResult(Object.keys(lhr.audits).sort().join('\n'));
 
   TestRunner.completeTest();
diff --git a/test/webtests/http/tests/devtools/lighthouse/lighthouse-prevent-run.js b/test/webtests/http/tests/devtools/lighthouse/lighthouse-prevent-run.js
index d429741718..cd56f8f10d 100644
--- a/test/webtests/http/tests/devtools/lighthouse/lighthouse-prevent-run.js
+++ b/test/webtests/http/tests/devtools/lighthouse/lighthouse-prevent-run.js
@@ -5,7 +5,7 @@
 (async function() {
   // about:blank never fires a load event so just wait until we see the URL change
   function navigateToAboutBlankAndWait() {
-    var listenerPromise = new Promise(resolve => {
+    const listenerPromise = new Promise(resolve => {
       self.SDK.targetManager.addEventListener(SDK.TargetManager.Events.InspectedURLChanged, resolve);
     });
 
@@ -21,8 +21,8 @@
 
   TestRunner.addResult('\n\n**Prevents audit with no categories**');
   LighthouseTestRunner.openStartAudit();
-  var containerElement = LighthouseTestRunner.getContainerElement();
-  var checkboxes = containerElement.querySelectorAll('.checkbox');
+  const containerElement = LighthouseTestRunner.getContainerElement();
+  const checkboxes = containerElement.querySelectorAll('.checkbox');
   checkboxes.forEach(checkbox => checkbox.checkboxElement.checked && checkbox.checkboxElement.click());
   LighthouseTestRunner.dumpStartAuditState();
 
diff --git a/test/webtests/http/tests/devtools/lighthouse/lighthouse-successful-run.js b/test/webtests/http/tests/devtools/lighthouse/lighthouse-successful-run.js
index 22aac4d6bd..b626e66e8b 100644
--- a/test/webtests/http/tests/devtools/lighthouse/lighthouse-successful-run.js
+++ b/test/webtests/http/tests/devtools/lighthouse/lighthouse-successful-run.js
@@ -5,7 +5,7 @@
 (async function() {
   // screenshots in content shell are flaky and NO_NAVSTART occurs on bots way more frequently than local
   // ignore the results of the trace-dependent audits, just make sure they ran
-  var FLAKY_AUDITS = [
+  const FLAKY_AUDITS = [
     // metrics
     'first-contentful-paint',
     'first-meaningful-paint',
@@ -42,12 +42,12 @@
 
   LighthouseTestRunner.dumpStartAuditState();
 
-  TestRunner.addResult(`\n=============== Lighthouse Status Updates ===============`);
+  TestRunner.addResult('\n=============== Lighthouse Status Updates ===============');
   LighthouseTestRunner.addStatusListener(msg => TestRunner.addResult(msg));
   LighthouseTestRunner.getRunButton().click();
 
-  var {artifacts, lhr} = await LighthouseTestRunner.waitForResults();
-  TestRunner.addResult(`\n=============== Lighthouse Results ===============`);
+  const {artifacts, lhr} = await LighthouseTestRunner.waitForResults();
+  TestRunner.addResult('\n=============== Lighthouse Results ===============');
   TestRunner.addResult(`URL: ${lhr.finalUrl}`);
   TestRunner.addResult(`Version: ${lhr.lighthouseVersion}`);
   TestRunner.addResult(`TestedAsMobileDevice: ${artifacts.TestedAsMobileDevice}`);
@@ -55,7 +55,7 @@
   TestRunner.addResult('\n');
 
   Object.keys(lhr.audits).sort().forEach(auditName => {
-    var audit = lhr.audits[auditName];
+    const audit = lhr.audits[auditName];
 
     if (FLAKY_AUDITS.includes(auditName)) {
       TestRunner.addResult(`${auditName}: flaky`);
diff --git a/test/webtests/http/tests/devtools/lighthouse/lighthouse-view-trace-run.js b/test/webtests/http/tests/devtools/lighthouse/lighthouse-view-trace-run.js
index 7fa16d0eae..4b8e6a7214 100644
--- a/test/webtests/http/tests/devtools/lighthouse/lighthouse-view-trace-run.js
+++ b/test/webtests/http/tests/devtools/lighthouse/lighthouse-view-trace-run.js
@@ -12,18 +12,20 @@
   const containerElement = LighthouseTestRunner.getContainerElement();
   const checkboxes = containerElement.querySelectorAll('.checkbox');
   for (const checkbox of checkboxes) {
-    if (checkbox.textElement.textContent === 'Performance' ||
-        checkbox.textElement.textContent === 'Clear storage')
+    if (checkbox.textElement.textContent === 'Performance' || checkbox.textElement.textContent === 'Clear storage') {
       continue;
+    }
 
-    if (checkbox.checkboxElement.checked) checkbox.checkboxElement.click();
+    if (checkbox.checkboxElement.checked) {
+      checkbox.checkboxElement.click();
+    }
   }
 
   LighthouseTestRunner.dumpStartAuditState();
   LighthouseTestRunner.getRunButton().click();
 
   const {lhr} = await LighthouseTestRunner.waitForResults();
-  TestRunner.addResult(`\n=============== Audits run ===============`);
+  TestRunner.addResult('\n=============== Audits run ===============');
   TestRunner.addResult(Object.keys(lhr.audits).sort().join('\n'));
 
   const waitForShowView = new Promise(resolve => {
diff --git a/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/a.js b/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/a.js
index 3bf001103b..578f5fbaf8 100644
--- a/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/a.js
+++ b/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/a.js
@@ -1,3 +1,5 @@
+/* eslint-disable */
+
 function foo() {
   return 42;
 }
@@ -7,8 +9,8 @@ function boo() {
 }
 
 function main() {
-  var a = 1;
-  var b = 2;
+  const a = 1;
+  const b = 2;
   return a + b;
 }
 
@@ -19,11 +21,6 @@ function process(a, b) {
 }
 
 
-
-
-
-
-
 function another() {
   return 1;
 }
diff --git a/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/breakpoint.js b/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/breakpoint.js
index 53047ba58d..61b5269148 100644
--- a/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/breakpoint.js
+++ b/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/breakpoint.js
@@ -1,3 +1,4 @@
+/* eslint-disable */
 define(['dart_sdk'], function(dart_sdk) {
   'use strict';
   const core = dart_sdk.core;
@@ -12,23 +13,21 @@ define(['dart_sdk'], function(dart_sdk) {
   let StringAndListTovoid = () => (StringAndListTovoid = dart.constFn(dart.fnType(dart.void, [core.String, core.List])))();
   let VoidTovoid = () => (VoidTovoid = dart.constFn(dart.fnType(dart.void, [])))();
   breakpoint._foo = function(a, b) {
-    let val1 = a[$codeUnits][$length];
-    let val2 = a[$runes].last;
-    let val3 = dart.test(b[$isNotEmpty]) ? 42 : null;
+    const val1 = a[$codeUnits][$length];
+    const val2 = a[$runes].last;
+    const val3 = dart.test(b[$isNotEmpty]) ? 42 : null;
     core.print(val3);
   };
   dart.fn(breakpoint._foo, StringAndListTovoid());
   breakpoint.main = function() {
-    breakpoint._foo("hello", []);
+    breakpoint._foo('hello', []);
   };
   dart.fn(breakpoint.main, VoidTovoid());
-  dart.trackLibraries("breakpoint", {
-    "breakpoint.dart": breakpoint
-  }, null);
+  dart.trackLibraries('breakpoint', {'breakpoint.dart': breakpoint}, null);
   // Exports:
   return {
     breakpoint: breakpoint
   };
 });
 
-//# sourceMappingURL=breakpoint.js.map
+// # sourceMappingURL=breakpoint.js.map
diff --git a/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/worker-with-sourcemap.js b/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/worker-with-sourcemap.js
index 64fe116eb5..bdf07beedd 100644
--- a/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/worker-with-sourcemap.js
+++ b/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/worker-with-sourcemap.js
@@ -1,7 +1,7 @@
-onmessage = function (data) {
-    var a = 1;
-    var b = 2;
-    return a + b;
+onmessage = function(data) {
+  const a = 1;
+  const b = 2;
+  return a + b;
 };
 postMessage('ready');
-//# sourceMappingURL=data:application/json;base64,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
\ No newline at end of file
+// # sourceMappingURL=data:application/json;base64,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
diff --git a/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/worker.js b/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/worker.js
index 5aedb7131c..9d724b3e37 100644
--- a/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/worker.js
+++ b/test/webtests/http/tests/devtools/sources/debugger-breakpoints/resources/worker.js
@@ -1,5 +1,5 @@
-onmessage = (data) => {
-  var a = 1;
-  var b = 2;
+onmessage = data => {
+  const a = 1;
+  const b = 2;
   return a + b;
 };
diff --git a/test/webtests/http/tests/devtools/sources/snippet-eval-uses-repl-mode.js b/test/webtests/http/tests/devtools/sources/snippet-eval-uses-repl-mode.js
index 67d5d0c311..737c9234ab 100644
--- a/test/webtests/http/tests/devtools/sources/snippet-eval-uses-repl-mode.js
+++ b/test/webtests/http/tests/devtools/sources/snippet-eval-uses-repl-mode.js
@@ -3,20 +3,20 @@
 // found in the LICENSE file.
 
 (async function() {
-    TestRunner.addResult(`Tests that snippet scripts are evaluated in REPL mode\n`);
+  TestRunner.addResult('Tests that snippet scripts are evaluated in REPL mode\n');
 
-    await TestRunner.showPanel('sources');
+  await TestRunner.showPanel('sources');
 
-    TestRunner.addSniffer(TestRunner.RuntimeAgent, "invoke_evaluate", function(args) {
-      TestRunner.addResult("Called RuntimeAgent.invoke_evaluate");
-      TestRunner.addResult("Value of 'replMode': " + args.replMode);
-    });
+  TestRunner.addSniffer(TestRunner.RuntimeAgent, 'invoke_evaluate', function(args) {
+    TestRunner.addResult('Called RuntimeAgent.invoke_evaluate');
+    TestRunner.addResult('Value of \'replMode\': ' + args.replMode);
+  });
 
-    const uiSourceCode = await Snippets.project.createFile('', null, '');
-    await uiSourceCode.rename('Snippet1');
-    uiSourceCode.setWorkingCopy('let a = 1; let a = 2;');
+  const uiSourceCode = await Snippets.project.createFile('', null, '');
+  await uiSourceCode.rename('Snippet1');
+  uiSourceCode.setWorkingCopy('let a = 1; let a = 2;');
 
-    await Snippets.evaluateScriptSnippet(uiSourceCode);
+  await Snippets.evaluateScriptSnippet(uiSourceCode);
 
-    TestRunner.completeTest();
+  TestRunner.completeTest();
 })();
diff --git a/test/webtests/http/tests/devtools/test_runner/assertions-show-up-in-logs.js b/test/webtests/http/tests/devtools/test_runner/assertions-show-up-in-logs.js
index 2310f968ca..9d7e6afa72 100644
--- a/test/webtests/http/tests/devtools/test_runner/assertions-show-up-in-logs.js
+++ b/test/webtests/http/tests/devtools/test_runner/assertions-show-up-in-logs.js
@@ -3,18 +3,18 @@
 // found in the LICENSE file.
 
 (async function() {
-  TestRunner.addResult(`Tests the test runner shows assertions in the logs\n`);
+  TestRunner.addResult('Tests the test runner shows assertions in the logs\n');
 
-  TestRunner.addResult(`Passing assert should not show up`);
-  console.assert(true, `This is a passing assertion.`);
+  TestRunner.addResult('Passing assert should not show up');
+  console.assert(true, 'This is a passing assertion.');
   TestRunner.addResult('');
 
-  TestRunner.addResult(`Failing assert should show up`);
-  console.assert(false, `This is a failing assertion.`);
+  TestRunner.addResult('Failing assert should show up');
+  console.assert(false, 'This is a failing assertion.');
   TestRunner.addResult('');
 
-  TestRunner.addResult(`Failing assert with multiple arguments`);
-  console.assert(false, `This is `, `a `, `failing assertion.`);
+  TestRunner.addResult('Failing assert with multiple arguments');
+  console.assert(false, 'This is ', 'a ', 'failing assertion.');
 
   TestRunner.completeTest();
 })();