diff --git a/package-lock.json b/package-lock.json
index 770cdad268..553ff1e647 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "testcafe",
-  "version": "3.4.0-rc.1",
+  "version": "3.4.0-rc.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "testcafe",
-      "version": "3.4.0-rc.1",
+      "version": "3.4.0-rc.2",
       "license": "MIT",
       "dependencies": {
         "@babel/core": "^7.23.2",
diff --git a/package.json b/package.json
index d882bfcc7f..8c4e043b9c 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "testcafe",
   "description": "Automated browser testing for the modern web development stack.",
   "license": "MIT",
-  "version": "3.4.0-rc.1",
+  "version": "3.4.0-rc.2",
   "author": {
     "name": "Developer Express Inc.",
     "url": "https://www.devexpress.com/"
diff --git a/src/runner/browser-job.ts b/src/runner/browser-job.ts
index 094ded2569..05e5dbb686 100644
--- a/src/runner/browser-job.ts
+++ b/src/runner/browser-job.ts
@@ -214,13 +214,17 @@ export default class BrowserJob extends AsyncEventEmitter {
         return this._testRunControllerQueue;
     }
 
+    private _getNextFixtureFirstTestIndex ( fixtureId: string ): number {
+        const nextFixtureFirstTestIndex = this._testRunControllerQueue.findIndex(testRun => testRun.test.fixture?.id !== fixtureId);
+
+        return nextFixtureFirstTestIndex === -1 ? this._testRunControllerQueue.length : nextFixtureFirstTestIndex;
+    }
+
     private _updateTestControllerQueues ({ test }: TestRunController, connectionId: string): void {
         if (!test.disableConcurrency || this._disableConcurrencyQueue[connectionId]?.length)
             return;
 
-        const lastIndexFixture = this._testRunControllerQueue.findIndex(el => el.test.fixture?.id !== test.fixture?.id);
-
-        this._disableConcurrencyQueue[connectionId] = this._testRunControllerQueue.splice(0, lastIndexFixture);
+        this._disableConcurrencyQueue[connectionId] = this._testRunControllerQueue.splice(0, this._getNextFixtureFirstTestIndex(test.fixture?.id as string));
     }
 
     // API
diff --git a/test/functional/fixtures/regression/gh-2011/test.js b/test/functional/fixtures/regression/gh-2011/test.js
index e4919cf98e..a73a9cae0e 100644
--- a/test/functional/fixtures/regression/gh-2011/test.js
+++ b/test/functional/fixtures/regression/gh-2011/test.js
@@ -1,8 +1,18 @@
-const path           = require('path');
-const createTestCafe = require('../../../../../lib');
+const path               = require('path');
+const createTestCafe     = require('../../../../../lib');
+const { createReporter } = require('../../../utils/reporter');
+const { expect }         = require('chai');
 
 let testCafe = null;
 let runner   = null;
+let errors   = null;
+
+const reporter = createReporter({
+    reportTestDone (_, testRunInfo) {
+        errors = testRunInfo.errs;
+    },
+});
+
 
 const run = (pathToTest, concurrency) => {
     const src = path.join(__dirname, pathToTest);
@@ -16,6 +26,7 @@ const run = (pathToTest, concurrency) => {
             return runner
                 .src(src)
                 .browsers(`chrome:headless`)
+                .reporter(reporter)
                 .concurrency(concurrency)
                 .run();
         })
@@ -27,10 +38,17 @@ const run = (pathToTest, concurrency) => {
 describe('[Regression](GH-2011)', function () {
 
     it('Should execute all fixture\'s test with disableConcurrency in one browser', function () {
-        return run('./testcafe-fixtures/concurrency-mode-with-disable-concurrency-fixture-test.js', 3);
+        return run('./testcafe-fixtures/concurrency-mode-with-disable-concurrency-fixture-test.js', 3)
+            .then(() => expect(errors.length).eql(0));
     });
 
     it('Should execute all fixture\'s in different browser', function () {
-        return run('./testcafe-fixtures/concurrency-mode-with-disable-concurrency-fixture-all-test.js', 3);
+        return run('./testcafe-fixtures/concurrency-mode-with-disable-concurrency-fixture-all-test.js', 3)
+            .then(() => expect(errors.length).eql(0));
+    });
+
+    it('Should execute all fixture\'s test in one browser', function () {
+        return run('./testcafe-fixtures/concurrency-mode-with-disable-concurrency-and-one-fixture-test.js', 3)
+            .then(() => expect(errors.length).eql(0));
     });
 });
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
new file mode 100644
index 0000000000..2a4f6cef2e
--- /dev/null
+++ b/test/functional/fixtures/regression/gh-2011/testcafe-fixtures/concurrency-mode-with-disable-concurrency-and-one-fixture-test.js
@@ -0,0 +1,24 @@
+const connectionsFixture = {};
+
+const addConnection = (connections, connectionId) => {
+    connections[connectionId] = true;
+};
+
+fixture `no concurrent fixture`
+    .beforeEach(async t => {
+        addConnection(connectionsFixture, t.testRun.browserConnection.id);
+    })
+    .afterEach(async t => {
+        await t.expect(Object.keys(connectionsFixture).length).eql(1);
+    })
+    .page `http://localhost:3000/fixtures/regression/gh-2011/pages/index.html`
+    .disableConcurrency();
+
+test('long concurrent test 1', async t => {
+    await t.wait(5000);
+});
+
+for (let i = 0; i < 10; i++) {
+    test(`no concurrent test ${i}`, async () => {
+    });
+}