diff --git a/test/functional/fixtures/api/es-next/client-function/test.js b/test/functional/fixtures/api/es-next/client-function/test.js
index 55ba15108cc..1a346d2e7ea 100644
--- a/test/functional/fixtures/api/es-next/client-function/test.js
+++ b/test/functional/fixtures/api/es-next/client-function/test.js
@@ -4,7 +4,7 @@ const { checkUserAgent } = require('../../../../assertion-helper');
 
 describe('[API] ClientFunction', function () {
     it('Should be correctly dispatched to test run', function () {
-        const browsers = 'chrome,firefox,ie';
+        const browsers = 'chrome,firefox';
 
         return runTests('./testcafe-fixtures/client-fn-test.js', 'Dispatch', { shouldFail: true, only: browsers })
             .catch(function (errs) {
diff --git a/test/functional/fixtures/api/es-next/dispatch-event/test.js b/test/functional/fixtures/api/es-next/dispatch-event/test.js
index 40555f6579e..04ce89bf9ad 100644
--- a/test/functional/fixtures/api/es-next/dispatch-event/test.js
+++ b/test/functional/fixtures/api/es-next/dispatch-event/test.js
@@ -1,38 +1,38 @@
 describe('[API] t.dispatchEvent()', function () {
     it('mouse', function () {
-        return runTests('testcafe-fixtures/index.js', 'mouse', { skip: ['ie', 'iphone'] });
+        return runTests('testcafe-fixtures/index.js', 'mouse', { skip: ['iphone'] });
     });
 
     it('keyboard', function () {
-        return runTests('testcafe-fixtures/index.js', 'keyboard', { skip: ['ie', 'iphone'] });
+        return runTests('testcafe-fixtures/index.js', 'keyboard', { skip: ['iphone'] });
     });
 
     it('input', function () {
-        return runTests('testcafe-fixtures/index.js', 'input', { skip: ['ie', 'safari'] });
+        return runTests('testcafe-fixtures/index.js', 'input', { skip: ['safari'] });
     });
 
     it('focus', function () {
-        return runTests('testcafe-fixtures/index.js', 'focus', { skip: 'ie' });
+        return runTests('testcafe-fixtures/index.js', 'focus');
     });
 
     it('pointer', function () {
-        return runTests('testcafe-fixtures/index.js', 'pointer', { skip: ['ie', 'iphone', 'ipad', 'safari'] });
+        return runTests('testcafe-fixtures/index.js', 'pointer', { skip: ['iphone', 'ipad', 'safari'] });
     });
 
     it('defaults', function () {
-        return runTests('testcafe-fixtures/index.js', 'defaults', { skip: ['ie', 'iphone'] });
+        return runTests('testcafe-fixtures/index.js', 'defaults', { skip: ['iphone'] });
     });
 
     it('predefined ctor', function () {
-        return runTests('testcafe-fixtures/index.js', 'predefined ctor', { skip: 'ie' });
+        return runTests('testcafe-fixtures/index.js', 'predefined ctor');
     });
 
     it('custom event', function () {
-        return runTests('testcafe-fixtures/index.js', 'custom event', { skip: 'ie' });
+        return runTests('testcafe-fixtures/index.js', 'custom event');
     });
 
     it('simple drag', function () {
-        return runTests('testcafe-fixtures/index.js', 'simple drag', { skip: 'ie' });
+        return runTests('testcafe-fixtures/index.js', 'simple drag');
     });
 });
 
diff --git a/test/functional/fixtures/api/es-next/eval/test.js b/test/functional/fixtures/api/es-next/eval/test.js
index 4180a60bc5f..74005945a3b 100644
--- a/test/functional/fixtures/api/es-next/eval/test.js
+++ b/test/functional/fixtures/api/es-next/eval/test.js
@@ -4,7 +4,7 @@ const { checkUserAgent } = require('../../../../assertion-helper');
 
 describe('[API] t.eval', function () {
     it('Should execute an anonymous client function', function () {
-        const browsers = 'chrome,firefox,ie';
+        const browsers = 'chrome,firefox';
 
         return runTests('./testcafe-fixtures/eval-test.js', 'Get UA', { shouldFail: true, only: browsers })
             .catch(function (errs) {
diff --git a/test/functional/fixtures/api/es-next/hooks/test.js b/test/functional/fixtures/api/es-next/hooks/test.js
index fd3d835f6db..81b7670bbb2 100644
--- a/test/functional/fixtures/api/es-next/hooks/test.js
+++ b/test/functional/fixtures/api/es-next/hooks/test.js
@@ -62,7 +62,7 @@ describe('[API] test.before/test.after hooks', () => {
 
 describe('[API] t.ctx', () => {
     it('Should pass context object to tests and hooks', () => {
-        return runTests('./testcafe-fixtures/run-all.js', 't.ctx', { shouldFail: true, only: 'chrome,ie,firefox' })
+        return runTests('./testcafe-fixtures/run-all.js', 't.ctx', { shouldFail: true, only: 'chrome,firefox' })
             .catch(errs => {
                 const testedBrowsers = config.currentEnvironment.browsers;
 
diff --git a/test/functional/fixtures/api/es-next/iframe-switching/pages/index.html b/test/functional/fixtures/api/es-next/iframe-switching/pages/index.html
index 828ff131b59..08a9e6f4f39 100644
--- a/test/functional/fixtures/api/es-next/iframe-switching/pages/index.html
+++ b/test/functional/fixtures/api/es-next/iframe-switching/pages/index.html
@@ -15,23 +15,7 @@ <h2>Same-domain iframes</h2>
 <iframe id="iframe" src="iframe.html" width="500px" height="300px"></iframe>
 <iframe id="invisible-iframe" style="visibility: hidden;"></iframe>
 <iframe name="long" id="slowly-loading-iframe" src="iframe.html?delay=1000" height="300px"></iframe>
-
-<script>
-    document.addEventListener('DOMContentLoaded', function () {
-        // NOTE: if we add a slowly loading iframe via markup, IE9 sometimes raises the DOMContentLoaded
-        // event after this iframe is completely loaded (in other browsers, this event never waits for
-        // an iframe to load). To avoid this collision, we create the iframe on the DOMContentLoaded event.
-        // It helps us get rid of an unstable functional test in IE9.
-        const tooSlowlyLoadingIframe = document.createElement('iframe');
-
-        tooSlowlyLoadingIframe.id           = 'too-slowly-loading-iframe';
-        tooSlowlyLoadingIframe.src          = "iframe.html?delay=10000";
-        tooSlowlyLoadingIframe.style.width  = "500px";
-        tooSlowlyLoadingIframe.style.height = "300px";
-
-        document.body.insertBefore(tooSlowlyLoadingIframe, document.getElementById('slowly-loading-iframe'));
-    });
-</script>
+<iframe id="too-slowly-loading-iframe" src="iframe.html?delay=10000"></iframe>
 
 <script>
     document.getElementById('btn').addEventListener('click', function () {
diff --git a/test/functional/fixtures/api/es-next/iframe-switching/test.js b/test/functional/fixtures/api/es-next/iframe-switching/test.js
index 1502b096c2d..53d15a52251 100644
--- a/test/functional/fixtures/api/es-next/iframe-switching/test.js
+++ b/test/functional/fixtures/api/es-next/iframe-switching/test.js
@@ -30,14 +30,14 @@ describe('[API] t.switchToIframe(), t.switchToMainWindow()', function () {
     it('Should switch context between a shadow iframe and the main window', function () {
         return runTests('./testcafe-fixtures/iframe-switching-test.js', 'Click on an element in a shadow iframe and return to the main window', {
             ...DEFAULT_RUN_OPTIONS,
-            skip: ['ie', 'edge'],
+            skip: ['edge'],
         });
     });
 
     it('Should switch context between a nested shadow iframe and the main window', function () {
         return runTests('./testcafe-fixtures/iframe-switching-test.js', 'Click on element in a nested shadow iframe', {
             ...DEFAULT_RUN_OPTIONS,
-            skip: ['ie', 'edge'],
+            skip: ['edge'],
         });
     });
 
@@ -72,7 +72,7 @@ describe('[API] t.switchToIframe(), t.switchToMainWindow()', function () {
     });
 
     it('Should work in an iframe with the srcdoc attribute', function () {
-        return runTests('./testcafe-fixtures/iframe-switching-test.js', 'Click in an iframe with the srcdoc attribute', { skip: 'ie', ...DEFAULT_RUN_OPTIONS });
+        return runTests('./testcafe-fixtures/iframe-switching-test.js', 'Click in an iframe with the srcdoc attribute', { ...DEFAULT_RUN_OPTIONS });
     });
 
     it('Correct execution order of "message" events in cross-domain iframe', function () {
diff --git a/test/functional/fixtures/api/es-next/roles/test.js b/test/functional/fixtures/api/es-next/roles/test.js
index 88253d892d5..459c9292770 100644
--- a/test/functional/fixtures/api/es-next/roles/test.js
+++ b/test/functional/fixtures/api/es-next/roles/test.js
@@ -18,7 +18,7 @@ const isRemoteTask = config.currentEnvironmentName === config.testingEnvironment
 (isRemoteTask ? describe.skip : describe)('[API] t.useRole()', function () {
     // TODO: stabilize the test in Firefox
     (config.hasBrowser('firefox') ? it.skip : it)('Should initialize and switch roles', function () {
-        return runTests('./testcafe-fixtures/use-role-test.js', null, { only: 'chrome,ie,firefox' });
+        return runTests('./testcafe-fixtures/use-role-test.js', null, { only: 'chrome,firefox' });
     });
 
     it('Should switch to Role.anonymous()', function () {
@@ -55,7 +55,7 @@ const isRemoteTask = config.currentEnvironmentName === config.testingEnvironment
         it('Should fail all tests that use role with the initializer error', function () {
             return runTests('./testcafe-fixtures/init-error-test.js', null, {
                 shouldFail: true,
-                only:       'chrome,ie,firefox',
+                only:       'chrome,firefox',
             })
                 .catch(function (errs) {
                     const testedBrowsers = config.currentEnvironment.browsers;
diff --git a/test/functional/fixtures/api/es-next/select-text/testcafe-fixtures/select-text-test.js b/test/functional/fixtures/api/es-next/select-text/testcafe-fixtures/select-text-test.js
index bae3c0273ed..6048d944111 100644
--- a/test/functional/fixtures/api/es-next/select-text/testcafe-fixtures/select-text-test.js
+++ b/test/functional/fixtures/api/es-next/select-text/testcafe-fixtures/select-text-test.js
@@ -99,34 +99,22 @@ test('End element selector returns text node', async t => {
     await t.selectEditableContent('#p1', getNode);
 });
 
-const isIEFunction = ClientFunction(() => {
-    const userAgent = window.navigator.userAgent;
-    const appName   = window.navigator.appName;
-    const isIE11Re  = new RegExp('Trident/.*rv:([0-9]{1,}[.0-9]{0,})');
-    const isMSEdge  = /Edge/.test(navigator.userAgent);
-
-    return appName === 'Microsoft Internet Explorer' ||
-           appName === 'Netscape' && isIE11Re.exec(userAgent) !== null ||
-           isMSEdge;
-});
-
 test('simple inverse selection in contenteditable', async t => {
     await t.selectText(Selector('#div'), 28, 2);
 
     const checkEditableContentInverseSelection = ClientFunction(() => {
         const selection   = window.getSelection();
         const div         = document.getElementById('div');
-        const isIE        = isIEFunction();
-        const startNode   = isIE ? div.childNodes[0] : div.childNodes[3].childNodes[0];
-        const startOffset = isIE ? 2 : 3;
-        const endNode     = isIE ? div.childNodes[3].childNodes[0] : div.childNodes[0];
-        const endOffset   = isIE ? 3 : 2;
+        const startNode   = div.childNodes[3].childNodes[0];
+        const startOffset = 3;
+        const endNode     = div.childNodes[0];
+        const endOffset   = 2;
 
         return selection.anchorNode === startNode &&
                selection.anchorOffset === startOffset &&
                selection.focusNode === endNode &&
                selection.focusOffset === endOffset;
-    }, { dependencies: { isIEFunction: isIEFunction } });
+    });
 
     await t.expect(checkEditableContentInverseSelection()).ok();
 });
@@ -137,17 +125,16 @@ test('difficult inverse selection in contenteditable', async t => {
     const checkEditableContentInverseSelection = ClientFunction(() => {
         const selection   = window.getSelection();
         const div         = document.getElementById('bigDiv');
-        const isIE        = isIEFunction();
-        const startNode   = isIE ? div.childNodes[0] : div.childNodes[10];
-        const startOffset = isIE ? 4 : 1;
-        const endNode     = isIE ? div.childNodes[10] : div.childNodes[0];
-        const endOffset   = isIE ? 1 : 4;
+        const startNode   = div.childNodes[10];
+        const startOffset = 1;
+        const endNode     = div.childNodes[0];
+        const endOffset   = 4;
 
         return selection.anchorNode === startNode &&
                selection.anchorOffset === startOffset &&
                selection.focusNode === endNode &&
                selection.focusOffset === endOffset;
-    }, { dependencies: { isIEFunction: isIEFunction } });
+    });
 
     await t.expect(checkEditableContentInverseSelection()).ok();
 });
diff --git a/test/functional/fixtures/api/es-next/selector/test.js b/test/functional/fixtures/api/es-next/selector/test.js
index c059d14415e..b3fd0809bdd 100644
--- a/test/functional/fixtures/api/es-next/selector/test.js
+++ b/test/functional/fixtures/api/es-next/selector/test.js
@@ -122,11 +122,11 @@ describe('[API] Selector', function () {
     });
 
     it('Selector "shadowRoot" method - children are found', function () {
-        return runTests('./testcafe-fixtures/selector-test.js', 'Selector "shadowRoot" method - children are found', Object.assign({ skip: ['ie', 'edge'] }, DEFAULT_RUN_OPTIONS));
+        return runTests('./testcafe-fixtures/selector-test.js', 'Selector "shadowRoot" method - children are found', Object.assign({ skip: ['edge'] }, DEFAULT_RUN_OPTIONS));
     });
 
     it('Selector "shadowRoot" method - shadow root not found', function () {
-        return runTests('./testcafe-fixtures/selector-test.js', 'Selector "shadowRoot" method - shadow root not found', Object.assign({ shouldFail: true, skip: ['ie', 'edge'] }, DEFAULT_RUN_OPTIONS))
+        return runTests('./testcafe-fixtures/selector-test.js', 'Selector "shadowRoot" method - shadow root not found', Object.assign({ shouldFail: true, skip: ['edge'] }, DEFAULT_RUN_OPTIONS))
             .catch(function (errs) {
                 expect(errs[0]).contains('The specified selector does not match any element in the DOM tree.');
                 expect(errs[0]).contains('| Selector(\'p\')');
@@ -136,14 +136,14 @@ describe('[API] Selector', function () {
     });
 
     it('Selector "shadowRoot" method - content property', function () {
-        return runTests('./testcafe-fixtures/selector-test.js', 'Selector "shadowRoot" method - content property', Object.assign({ skip: ['ie', 'edge'] }, DEFAULT_RUN_OPTIONS));
+        return runTests('./testcafe-fixtures/selector-test.js', 'Selector "shadowRoot" method - content property', Object.assign({ skip: ['edge'] }, DEFAULT_RUN_OPTIONS));
     });
 
     it('Cannot use "shadowRoot" as a target', function () {
-        return runTests('./testcafe-fixtures/selector-test.js', 'Cannot use "shadowRoot" as a target', Object.assign({ shouldFail: true, skip: ['ie', 'edge'] }, DEFAULT_RUN_OPTIONS))
+        return runTests('./testcafe-fixtures/selector-test.js', 'Cannot use "shadowRoot" as a target', Object.assign({ shouldFail: true, skip: ['edge'] }, DEFAULT_RUN_OPTIONS))
             .catch(function (errs) {
                 expect(errs[0]).contains('The specified selector is expected to match a DOM element, but it matches a document fragment node.');
-                expect(errs[0]).contains('> 1121 |    await t.click(shadowRoot);');
+                expect(/> \d* |\s{4}await t.click(shadowRoot);/.test(errs[0])).to.be.ok;
             });
     });
 
diff --git a/test/functional/fixtures/api/es-next/selector/testcafe-fixtures/selector-test.js b/test/functional/fixtures/api/es-next/selector/testcafe-fixtures/selector-test.js
index 5093241760d..a8cba0827e1 100644
--- a/test/functional/fixtures/api/es-next/selector/testcafe-fixtures/selector-test.js
+++ b/test/functional/fixtures/api/es-next/selector/testcafe-fixtures/selector-test.js
@@ -6,15 +6,6 @@ fixture `Selector`
 
 const getElementById = Selector(id => document.getElementById(id));
 
-const isIEFunction = ClientFunction(() => {
-    const userAgent = window.navigator.userAgent;
-    const appName   = window.navigator.appName;
-    const isIE11Re  = new RegExp('Trident/.*rv:([0-9]{1,}[.0-9]{0,})');
-
-    return appName === 'Microsoft Internet Explorer' ||
-           appName === 'Netscape' && isIE11Re.exec(userAgent) !== null;
-});
-
 test('HTMLElement snapshot basic properties', async t => {
     const el = await getElementById('htmlElement');
 
@@ -167,15 +158,11 @@ test('Input-specific element snapshot properties', async t => {
 });
 
 test('`innerText` element snapshot property', async t => {
-    const isIE    = await isIEFunction();
     let innerText = await getElementById('htmlElementWithInnerText').innerText;
 
     innerText = innerText.trim().replace(/\r\n/, '\n');
 
-    // NOTE: we have to use regexp because the innerText field
-    // returns a little bit different values in IE9 and other browsers
-    const expectedTextRe = isIE ? /^Hey\nyo test {2}42 test {2}'hey hey'; \.someClass \{ \}/ :
-        /^Hey\nyo test {1,2}test/;
+    const expectedTextRe = /^Hey\nyo test {1,2}test/;
 
     await t.expect(expectedTextRe.test(innerText.trim())).ok();
 });
diff --git a/test/functional/fixtures/api/es-next/take-screenshot/testcafe-fixtures/take-screenshot.js b/test/functional/fixtures/api/es-next/take-screenshot/testcafe-fixtures/take-screenshot.js
index 4d6b5ce1794..38996d66448 100644
--- a/test/functional/fixtures/api/es-next/take-screenshot/testcafe-fixtures/take-screenshot.js
+++ b/test/functional/fixtures/api/es-next/take-screenshot/testcafe-fixtures/take-screenshot.js
@@ -124,12 +124,9 @@ test
         const expectedWidth  = width - scrollbarSize;
         const expectedHeight = height - scrollbarSize;
 
-        // NOTE: IE clips screenshots not accurately
-        const accuracy = parseUserAgent(ua).name === 'Internet Explorer' ? 1 : 0;
-
         await t.expect(scrollbarSize).gt(0);
-        await t.expect(Math.abs(png.width - expectedWidth)).lte(accuracy);
-        await t.expect(Math.abs(png.height - expectedHeight)).lte(accuracy);
+        await t.expect(png.width).eql(expectedWidth);
+        await t.expect(png.height).eql(expectedHeight);
     });
 
 test('Should add default extension', async t => {