diff --git a/packages/kbn-test/src/index.ts b/packages/kbn-test/src/index.ts
index bc17b731f0aa5..7bc1e7e2cb168 100644
--- a/packages/kbn-test/src/index.ts
+++ b/packages/kbn-test/src/index.ts
@@ -48,7 +48,7 @@ export { runFtrCli } from './functional_test_runner/cli';
 
 export { runFailedTestsReporterCli } from './failed_tests_reporter';
 
-export { makeJunitReportPath } from './junit_report_path';
+export { getUniqueJunitReportPath } from './junit_report_path';
 
 export { CI_PARALLEL_PROCESS_PREFIX } from './ci_parallel_process_prefix';
 
diff --git a/packages/kbn-test/src/junit_report_path.ts b/packages/kbn-test/src/junit_report_path.ts
index 90405d7a89c02..8843204097e85 100644
--- a/packages/kbn-test/src/junit_report_path.ts
+++ b/packages/kbn-test/src/junit_report_path.ts
@@ -17,14 +17,24 @@
  * under the License.
  */
 
-import { resolve } from 'path';
+import Fs from 'fs';
+import Path from 'path';
+
 import { CI_PARALLEL_PROCESS_PREFIX } from './ci_parallel_process_prefix';
 
-export function makeJunitReportPath(rootDirectory: string, reportName: string) {
-  return resolve(
+export function getUniqueJunitReportPath(
+  rootDirectory: string,
+  reportName: string,
+  counter?: number
+): string {
+  const path = Path.resolve(
     rootDirectory,
     'target/junit',
     process.env.JOB || '.',
-    `TEST-${CI_PARALLEL_PROCESS_PREFIX}${reportName}.xml`
+    `TEST-${CI_PARALLEL_PROCESS_PREFIX}${reportName}${counter ? `-${counter}` : ''}.xml`
   );
+
+  return Fs.existsSync(path)
+    ? getUniqueJunitReportPath(rootDirectory, reportName, (counter ?? 0) + 1)
+    : path;
 }
diff --git a/src/dev/jest/integration_tests/junit_reporter.test.js b/src/dev/jest/integration_tests/junit_reporter.test.js
index 3280482a54203..65a955e17bb18 100644
--- a/src/dev/jest/integration_tests/junit_reporter.test.js
+++ b/src/dev/jest/integration_tests/junit_reporter.test.js
@@ -24,13 +24,13 @@ import { readFileSync } from 'fs';
 import del from 'del';
 import execa from 'execa';
 import xml2js from 'xml2js';
-import { makeJunitReportPath } from '@kbn/test';
+import { getUniqueJunitReportPath } from '@kbn/test';
 
 const MINUTE = 1000 * 60;
 const ROOT_DIR = resolve(__dirname, '../../../../');
 const FIXTURE_DIR = resolve(__dirname, '__fixtures__');
 const TARGET_DIR = resolve(FIXTURE_DIR, 'target');
-const XML_PATH = makeJunitReportPath(FIXTURE_DIR, 'Jest Tests');
+const XML_PATH = getUniqueJunitReportPath(FIXTURE_DIR, 'Jest Tests');
 
 afterAll(async () => {
   await del(TARGET_DIR);
diff --git a/src/dev/jest/junit_reporter.js b/src/dev/jest/junit_reporter.js
index 7d43a224452af..ba8eca424cee0 100644
--- a/src/dev/jest/junit_reporter.js
+++ b/src/dev/jest/junit_reporter.js
@@ -23,7 +23,7 @@ import { writeFileSync, mkdirSync } from 'fs';
 import xmlBuilder from 'xmlbuilder';
 
 import { escapeCdata } from '../xml';
-import { makeJunitReportPath } from '@kbn/test';
+import { getUniqueJunitReportPath } from '@kbn/test';
 
 const ROOT_DIR = dirname(require.resolve('../../../package.json'));
 
@@ -103,7 +103,7 @@ export default class JestJUnitReporter {
       });
     });
 
-    const reportPath = makeJunitReportPath(rootDirectory, reportName);
+    const reportPath = getUniqueJunitReportPath(rootDirectory, reportName);
     const reportXML = root.end();
     mkdirSync(dirname(reportPath), { recursive: true });
     writeFileSync(reportPath, reportXML, 'utf8');
diff --git a/src/dev/mocha/__tests__/junit_report_generation.js b/src/dev/mocha/__tests__/junit_report_generation.js
index 00a11432dd9e8..dc7d161eca5a3 100644
--- a/src/dev/mocha/__tests__/junit_report_generation.js
+++ b/src/dev/mocha/__tests__/junit_report_generation.js
@@ -25,13 +25,14 @@ import { parseString } from 'xml2js';
 import del from 'del';
 import Mocha from 'mocha';
 import expect from '@kbn/expect';
-import { makeJunitReportPath } from '@kbn/test';
+import { getUniqueJunitReportPath } from '@kbn/test';
 
 import { setupJUnitReportGeneration } from '../junit_report_generation';
 
 const PROJECT_DIR = resolve(__dirname, 'fixtures/project');
 const DURATION_REGEX = /^\d+\.\d{3}$/;
 const ISO_DATE_SEC_REGEX = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}$/;
+const XML_PATH = getUniqueJunitReportPath(PROJECT_DIR, 'test');
 
 describe('dev/mocha/junit report generation', () => {
   afterEach(() => {
@@ -50,9 +51,7 @@ describe('dev/mocha/junit report generation', () => {
 
     mocha.addFile(resolve(PROJECT_DIR, 'test.js'));
     await new Promise((resolve) => mocha.run(resolve));
-    const report = await fcb((cb) =>
-      parseString(readFileSync(makeJunitReportPath(PROJECT_DIR, 'test')), cb)
-    );
+    const report = await fcb((cb) => parseString(readFileSync(XML_PATH), cb));
 
     // test case results are wrapped in <testsuites></testsuites>
     expect(report).to.eql({
diff --git a/src/dev/mocha/junit_report_generation.js b/src/dev/mocha/junit_report_generation.js
index a2e4e7d570ba1..096d82778ca42 100644
--- a/src/dev/mocha/junit_report_generation.js
+++ b/src/dev/mocha/junit_report_generation.js
@@ -22,7 +22,7 @@ import { writeFileSync, mkdirSync } from 'fs';
 import { inspect } from 'util';
 
 import xmlBuilder from 'xmlbuilder';
-import { makeJunitReportPath } from '@kbn/test';
+import { getUniqueJunitReportPath } from '@kbn/test';
 
 import { getSnapshotOfRunnableLogs } from './log_cache';
 import { escapeCdata } from '../xml';
@@ -140,7 +140,7 @@ export function setupJUnitReportGeneration(runner, options = {}) {
       }
     });
 
-    const reportPath = makeJunitReportPath(rootDirectory, reportName);
+    const reportPath = getUniqueJunitReportPath(rootDirectory, reportName);
     const reportXML = builder.end();
     mkdirSync(dirname(reportPath), { recursive: true });
     writeFileSync(reportPath, reportXML, 'utf8');
diff --git a/tasks/config/karma.js b/tasks/config/karma.js
index fa4bdc8ed2266..7fd83801b7c4d 100644
--- a/tasks/config/karma.js
+++ b/tasks/config/karma.js
@@ -19,7 +19,7 @@
 
 import { dirname } from 'path';
 import { times } from 'lodash';
-import { makeJunitReportPath } from '@kbn/test';
+import { getUniqueJunitReportPath } from '@kbn/test';
 import * as UiSharedDeps from '@kbn/ui-shared-deps';
 import { DllCompiler } from '../../src/optimize/dynamic_dll_plugin';
 
@@ -117,7 +117,7 @@ module.exports = function (grunt) {
       reporters: pickReporters(),
 
       junitReporter: {
-        outputFile: makeJunitReportPath(ROOT, 'karma'),
+        outputFile: getUniqueJunitReportPath(ROOT, 'karma'),
         useBrowserName: false,
         nameFormatter: (_, result) => [...result.suite, result.description].join(' '),
         classNameFormatter: (_, result) => {