diff --git a/libraries/tools/kotlin-test-js-runner/build.gradle.kts b/libraries/tools/kotlin-test-js-runner/build.gradle.kts
index 61e9e485d48..c63fc1667d8 100644
--- a/libraries/tools/kotlin-test-js-runner/build.gradle.kts
+++ b/libraries/tools/kotlin-test-js-runner/build.gradle.kts
@@ -51,6 +51,7 @@ tasks {
             "nodejs.ts",
             "karma.ts",
             "karma-kotlin-reporter.js",
+            "mocha-kotlin-reporter.js",
             "nodejs-source-map-support.js",
             "package.json",
             "rollup.config.js",
diff --git a/libraries/tools/kotlin-test-js-runner/mocha-kotlin-reporter.js b/libraries/tools/kotlin-test-js-runner/mocha-kotlin-reporter.js
new file mode 100644
index 00000000000..fd670d5c4d5
--- /dev/null
+++ b/libraries/tools/kotlin-test-js-runner/mocha-kotlin-reporter.js
@@ -0,0 +1,172 @@
+/**
+ * From mocha-teamcity-reporter
+ * The MIT License
+ * Copyright (c) 2016 Jamie Sherriff
+ */
+
+/**
+ * Teamcity doc reference https://confluence.jetbrains.com/display/TCD10/Build+Script+Interaction+with+TeamCity
+ *
+ * Module dependencies.
+ */
+'use strict';
+
+const processPID = process.pid.toString();
+const TEST_IGNORED = `##teamcity[testIgnored name='%s' message='%s' flowId='%s']`;
+const SUITE_START = `##teamcity[testSuiteStarted name='%s' flowId='%s']`;
+const SUITE_END = `##teamcity[testSuiteFinished name='%s' duration='%s' flowId='%s']`;
+const SUITE_END_NO_DURATION = `##teamcity[testSuiteFinished name='%s' flowId='%s']`;
+const TEST_START = `##teamcity[testStarted name='%s' captureStandardOutput='true' flowId='%s']`;
+const TEST_FAILED = `##teamcity[testFailed name='%s' message='%s' details='%s' captureStandardOutput='true' flowId='%s']`;
+const TEST_FAILED_COMPARISON = `##teamcity[testFailed type='comparisonFailure' name='%s' message='%s' \
+details='%s' captureStandardOutput='true' actual='%s' expected='%s' flowId='%s']`;
+const TEST_END = `##teamcity[testFinished name='%s' duration='%s' flowId='%s']`;
+const TEST_END_NO_DURATION = `##teamcity[testFinished name='%s' flowId='%s']`;
+
+const util = require('util');
+
+let Base, log, logError;
+
+Base = require('mocha').reporters.Base;
+log = console.log;
+logError = console.error;
+
+/**
+ * Escape the given `str`.
+ */
+
+function escape(str) {
+    if (!str) return '';
+    return str
+        .toString()
+        .replace(/\x1B.*?m/g, '') // eslint-disable-line no-control-regex
+        .replace(/\|/g, '||')
+        .replace(/\n/g, '|n')
+        .replace(/\r/g, '|r')
+        .replace(/\[/g, '|[')
+        .replace(/\]/g, '|]')
+        .replace(/\u0085/g, '|x')
+        .replace(/\u2028/g, '|l')
+        .replace(/\u2029/g, '|p')
+        .replace(/'/g, '|\'');
+}
+
+function isNil(value) {
+    return value == null; 	// eslint-disable-line
+}
+
+function formatString() {
+    let formattedArguments = [];
+    const args = Array.prototype.slice.call(arguments, 0);
+    // Format all arguments for TC display (it escapes using the pipe char).
+    let tcMessage = args.shift();
+    args.forEach((param) => {
+        formattedArguments.push(escape(param));
+    });
+    formattedArguments.unshift(tcMessage);
+    return util.format.apply(util, formattedArguments);
+}
+
+
+/**
+ * Initialize a new `Teamcity` reporter.
+ *
+ * @param {Runner} runner
+ * @param {options} options
+ * @api public
+ */
+
+function Teamcity(runner, options) {
+    options = options || {};
+    const reporterOptions = options.reporterOptions || {};
+    let flowId, useStdError, recordHookFailures, actualVsExpected;
+    (reporterOptions.flowId) ? flowId = reporterOptions.flowId : flowId = process.env['MOCHA_TEAMCITY_FLOWID'] || processPID;
+    (reporterOptions.useStdError) ? useStdError = reporterOptions.useStdError : useStdError = process.env['USE_STD_ERROR'];
+    (reporterOptions.recordHookFailures) ? recordHookFailures = reporterOptions.recordHookFailures : recordHookFailures =
+        process.env['RECORD_HOOK_FAILURES'];
+    (reporterOptions.actualVsExpected) ? actualVsExpected = reporterOptions.actualVsExpected : actualVsExpected =
+        process.env['ACTUAL_VS_EXPECTED'];
+    (useStdError) ? useStdError = (useStdError.toLowerCase() === 'true') : useStdError = false;
+    (recordHookFailures) ? recordHookFailures = (recordHookFailures.toLowerCase() === 'true') : recordHookFailures = false;
+    actualVsExpected ? actualVsExpected = (actualVsExpected.toLowerCase() === 'true') : actualVsExpected = false;
+    Base.call(this, runner);
+    let stats = this.stats;
+    const topLevelSuite = reporterOptions.topLevelSuite || process.env['MOCHA_TEAMCITY_TOP_LEVEL_SUITE'];
+
+    runner.on('suite', function (suite) {
+        if (suite.root) {
+            if (topLevelSuite) {
+                log(formatString(SUITE_START, topLevelSuite, flowId));
+            }
+            return;
+        }
+        suite.startDate = new Date();
+        log(formatString(SUITE_START, suite.title, flowId));
+    });
+
+    runner.on('test', function (test) {
+        log(formatString(TEST_START, test.title, flowId));
+    });
+
+    runner.on('fail', function (test, err) {
+        if (actualVsExpected && (err.actual && err.expected)) {
+            if (useStdError) {
+                logError(formatString(TEST_FAILED_COMPARISON, test.title, err.message, err.stack, err.actual, err.expected, flowId));
+            }
+            else {
+                log(formatString(TEST_FAILED_COMPARISON, test.title, err.message, err.stack, err.actual, err.expected, flowId));
+            }
+        }
+        else {
+            if (useStdError) {
+                logError(formatString(TEST_FAILED, test.title, err.message, err.stack, flowId));
+            }
+            else {
+                log(formatString(TEST_FAILED, test.title, err.message, err.stack, flowId));
+            }
+        }
+    });
+
+    runner.on('pending', function (test) {
+        log(formatString(TEST_IGNORED, test.title, test.title, flowId));
+    });
+
+    runner.on('test end', function (test) {
+        // This is necessary not to emit `test end` event on skipped tests
+        if (test.isPending()) return
+
+        if (isNil(test.duration)) {
+            log(formatString(TEST_END_NO_DURATION, test.title, flowId));
+        }
+        else {
+            log(formatString(TEST_END, test.title, test.duration.toString(), flowId));
+        }
+    });
+
+    runner.on('hook', function (test) {
+        if (recordHookFailures) {
+            log(formatString(TEST_START, test.title, flowId));
+        }
+    });
+
+    runner.on('suite end', function (suite) {
+        if (suite.root) return;
+        log(formatString(SUITE_END, suite.title, new Date() - suite.startDate, flowId));
+    });
+
+    runner.on('end', function () {
+        let duration;
+        (typeof stats === 'undefined') ? duration = null : duration = stats.duration;
+        if (topLevelSuite) {
+            isNil(duration) ? log(formatString(SUITE_END_NO_DURATION, topLevelSuite, flowId)) : log(
+                formatString(SUITE_END, topLevelSuite, duration, flowId));
+        }
+    });
+}
+
+
+/**
+ * Expose `Teamcity`.
+ */
+
+exports = module.exports = Teamcity;
\ No newline at end of file
diff --git a/libraries/tools/kotlin-test-js-runner/package.json b/libraries/tools/kotlin-test-js-runner/package.json
index 34f0f817861..8f221f49606 100644
--- a/libraries/tools/kotlin-test-js-runner/package.json
+++ b/libraries/tools/kotlin-test-js-runner/package.json
@@ -11,7 +11,7 @@
     "lib/**/*"
   ],
   "scripts": {
-    "build": "rimraf lib/* && rollup -c rollup.config.js && copyfiles \"karma-kotlin-reporter.js\" lib"
+    "build": "rimraf lib/* && rollup -c rollup.config.js && copyfiles \"karma-kotlin-reporter.js\" \"mocha-kotlin-reporter.js\" lib"
   },
   "dependencies": {
     "@types/node": "^10.12.21",
diff --git a/license/README.md b/license/README.md
index cef8660c727..f49262ed169 100644
--- a/license/README.md
+++ b/license/README.md
@@ -187,6 +187,10 @@ any distributions of the tools or libraries:
              and [license/third_party/karma-teamcity-reporter_LICENSE.txt](third_party/karma-teamcity-reporter_LICENSE.txt))
       - Origin: Copyright (C) 2011-2019 Google, Inc. and Copyright (C) 2011-2013 Vojta Jína and contributors.
       
+ - Path: libraries/tools/kotlin-test-js-runner/mocha-kotlin-reporter.js
+      - License: MIT ([license/third_party/mocha-teamcity-reporter_LICENSE.txt](third_party/mocha-teamcity-reporter_LICENSE.txt))
+      - Origin: Copyright (c) 2016 Jamie Sherriff
+      
  - Path: libraries/tools/kotlin-test-js-runner/src/utils.ts
       - License: MIT ([license/third_party/teamcity-service-messages_LICENSE.txt](third_party/teamcity-service-messages_LICENSE.txt)
              and [license/third_party/lodash_LICENSE.txt](third_party/lodash_LICENSE.txt))
diff --git a/license/third_party/mocha-teamcity-reporter_LICENSE.txt b/license/third_party/mocha-teamcity-reporter_LICENSE.txt
new file mode 100644
index 00000000000..23ca9cd4d7f
--- /dev/null
+++ b/license/third_party/mocha-teamcity-reporter_LICENSE.txt
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Jamie Sherriff
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file