diff --git a/src/api/structure/fixture.ts b/src/api/structure/fixture.ts
index 2198ef6e73b..d55cdc2ea93 100644
--- a/src/api/structure/fixture.ts
+++ b/src/api/structure/fixture.ts
@@ -62,7 +62,7 @@ export default class Fixture extends TestingUnit {
         return this.apiOrigin;
     }
 
-    private _disableConcurrency$ (): Function {
+    private _disableConcurrency$getter (): Function {
         this.disableConcurrency = true;
 
         return this.apiOrigin;
diff --git a/test/functional/fixtures/regression/gh-2011/testcafe-fixtures/concurrency-mode-with-disable-concurrency-and-one-fixture-test.js b/test/functional/fixtures/regression/gh-2011/testcafe-fixtures/concurrency-mode-with-disable-concurrency-and-one-fixture-test.js
index 2a4f6cef2e9..fd7a5ee4fcb 100644
--- a/test/functional/fixtures/regression/gh-2011/testcafe-fixtures/concurrency-mode-with-disable-concurrency-and-one-fixture-test.js
+++ b/test/functional/fixtures/regression/gh-2011/testcafe-fixtures/concurrency-mode-with-disable-concurrency-and-one-fixture-test.js
@@ -12,7 +12,7 @@ fixture `no concurrent fixture`
         await t.expect(Object.keys(connectionsFixture).length).eql(1);
     })
     .page `http://localhost:3000/fixtures/regression/gh-2011/pages/index.html`
-    .disableConcurrency();
+    .disableConcurrency;
 
 test('long concurrent test 1', async t => {
     await t.wait(5000);
diff --git a/test/functional/fixtures/regression/gh-2011/testcafe-fixtures/concurrency-mode-with-disable-concurrency-fixture-all-test.js b/test/functional/fixtures/regression/gh-2011/testcafe-fixtures/concurrency-mode-with-disable-concurrency-fixture-all-test.js
index cf149d1cbd1..48432c110a5 100644
--- a/test/functional/fixtures/regression/gh-2011/testcafe-fixtures/concurrency-mode-with-disable-concurrency-fixture-all-test.js
+++ b/test/functional/fixtures/regression/gh-2011/testcafe-fixtures/concurrency-mode-with-disable-concurrency-fixture-all-test.js
@@ -33,7 +33,7 @@ fixture `fixture 1`
     .after(() => {
         assertSingleConnection(connectionsFixture1);
     })
-    .disableConcurrency();
+    .disableConcurrency;
 
 for (let i = 0; i < TEST_COUNT; i++) {
     test(`fixture 1 - test ${i}`, async () => {
@@ -50,7 +50,7 @@ fixture `fixture 2`
     .after(() => {
         assertSingleConnection(connectionsFixture2);
     })
-    .disableConcurrency();
+    .disableConcurrency;
 
 for (let i = 0; i < TEST_COUNT; i++) {
     test(`fixture 2 - test ${i}`, async () => {
@@ -67,7 +67,7 @@ fixture `fixture 3`
     .after(() => {
         assertSingleConnection(connectionsFixture3);
     })
-    .disableConcurrency();
+    .disableConcurrency;
 
 for (let i = 0; i < TEST_COUNT; i++) {
     test(`fixture 3 - test ${i}`, async () => {
diff --git a/test/functional/fixtures/regression/gh-2011/testcafe-fixtures/concurrency-mode-with-disable-concurrency-fixture-test.js b/test/functional/fixtures/regression/gh-2011/testcafe-fixtures/concurrency-mode-with-disable-concurrency-fixture-test.js
index 66991cd7bde..becd8f2d066 100644
--- a/test/functional/fixtures/regression/gh-2011/testcafe-fixtures/concurrency-mode-with-disable-concurrency-fixture-test.js
+++ b/test/functional/fixtures/regression/gh-2011/testcafe-fixtures/concurrency-mode-with-disable-concurrency-fixture-test.js
@@ -34,7 +34,7 @@ fixture `no concurrent fixture`
         await t.expect(Object.keys(connectionsFixture2).length).eql(1);
     })
     .page `http://localhost:3000/fixtures/regression/gh-2011/pages/index.html`
-    .disableConcurrency();
+    .disableConcurrency;
 
 test('long concurrent test 1', async t => {
     await t.wait(5000);
diff --git a/test/server/api-test.js b/test/server/api-test.js
index 0b2076400f9..6c71d982a03 100644
--- a/test/server/api-test.js
+++ b/test/server/api-test.js
@@ -7,6 +7,7 @@ const compile             = require('./helpers/compile');
 const OPTION_NAMES        = require('../../lib/configuration/option-names');
 const Compiler            = require('../../lib/compiler');
 const { RUNTIME_ERRORS }  = require('../../lib/errors/types');
+const Fixture             = require('../../lib/api/structure/fixture');
 
 
 describe('API', function () {
@@ -1862,4 +1863,26 @@ describe('API', function () {
             expect(configuration.getOption(OPTION_NAMES.disableHttp2)).be.true;
         });
     });
+
+    describe('API Methods Validation', () => {
+        it('Should checks all methods', async () => {
+            const GETTER_API_METHODS    = ['only', 'skip', 'disablePageReloads', 'enablePageReloads', 'disablePageCaching', 'disableConcurrency'];
+            const FUNCTIONS_API_METHODS = ['page', 'skipJsErrors', 'httpAuth', 'meta', 'before', 'after', 'beforeEach', 'afterEach', 'requestHooks', 'clientScripts'];
+
+            for (const apiMethod of Fixture.API_LIST) {
+                if (!GETTER_API_METHODS.includes(apiMethod.apiProp) && !FUNCTIONS_API_METHODS.includes(apiMethod.apiProp)) {
+                    throw new Error(`Please, check the "${apiMethod.srcProp}" method.
+                    If the method doesn't accept any arguments, ensure that the method is implemented as a 'getter' and add the method name to GETTER_API_METHODS.
+                    If the method accepts arguments, ensure that the method is implemented as a 'function' and add the method name to FUNCTIONS_API_METHODS.
+                    `);
+                }
+
+                if (GETTER_API_METHODS.includes(apiMethod.apiProp) && apiMethod.accessor !== 'getter')
+                    throw new Error(`Make sure that the method "${apiMethod.srcProp}" is implemented as a "getter"`);
+
+                if (FUNCTIONS_API_METHODS.includes(apiMethod.apiProp) && apiMethod.accessor)
+                    throw new Error(`Make sure that the method "${apiMethod.srcProp}" is implemented as a "function"`);
+            }
+        });
+    });
 });
diff --git a/ts-defs-src/test-api/structure.d.ts b/ts-defs-src/test-api/structure.d.ts
index dfb0c72595b..0697ca8c790 100644
--- a/ts-defs-src/test-api/structure.d.ts
+++ b/ts-defs-src/test-api/structure.d.ts
@@ -110,6 +110,10 @@ interface FixtureFn {
      * Disables page reloading which would happen right before each test in this fixture.
      */
     disablePageReloads: this;
+    /**
+     * Disables the global concurrency setting for this fixture.
+     */
+    disableConcurrency: this;
     /**
      * Specifies the additional information for all tests in the fixture. This information can be used in reports.
      *