diff --git a/package.json b/package.json
index 0776c8ad0f..40d6b3a2be 100644
--- a/package.json
+++ b/package.json
@@ -54,8 +54,7 @@
     "generate": "node tasks/generate-json-schema-to-ts.js && node tasks/generate-mono-schema.js",
     "prebuild": "npm run generate",
     "build": "tsc -b && lerna run build",
-    "test": "npm run mocha",
-    "mocha": "lerna run test --stream --concurrency 4",
+    "test": "lerna run test --stream --concurrency 2",
     "e2e": "cd e2e && npm ci && npm t && cd ..",
     "perf": "cd perf && npm ci && npm t && cd ..",
     "start": "tsc -b -w",
diff --git a/packages/api/.mocharc.jsonc b/packages/api/.mocharc.jsonc
index 7aa86ca6b3..907a3f97fc 100644
--- a/packages/api/.mocharc.jsonc
+++ b/packages/api/.mocharc.jsonc
@@ -1,3 +1,4 @@
 {
-  "require": ["test/setup.js"]
+  "require": ["test/setup.js"],
+  "timeout": 10000
 }
diff --git a/packages/core/.mocharc.jsonc b/packages/core/.mocharc.jsonc
index 7cee2a58be..3c32c9ff9d 100644
--- a/packages/core/.mocharc.jsonc
+++ b/packages/core/.mocharc.jsonc
@@ -1,3 +1,4 @@
 {
-  "require": ["./test/setup.js"]
+  "require": ["./test/setup.js"],
+  "timeout": 10000
 }
diff --git a/packages/jasmine-runner/test/integration/memory-leak.it.spec.ts b/packages/jasmine-runner/test/integration/memory-leak.it.spec.ts
index 28aa4eff5b..6eccb716a0 100644
--- a/packages/jasmine-runner/test/integration/memory-leak.it.spec.ts
+++ b/packages/jasmine-runner/test/integration/memory-leak.it.spec.ts
@@ -7,7 +7,7 @@ import { expect } from 'chai';
 import { JasmineTestRunner } from '../../src';
 
 describe(JasmineTestRunner.name, () => {
-  it('should not leak memory when running multiple times (#2461)', async () => {
+  it('should not leak memory when running multiple times (#2461)', async function () {
     const childProcess = await execa.node(path.resolve(__dirname, 'memory-leak.worker.js'), [], {
       stdio: 'pipe',
       nodeOptions: ['--max-old-space-size=32', '--max-semi-space-size=1'],
diff --git a/packages/jest-runner/.mocharc.jsonc b/packages/jest-runner/.mocharc.jsonc
index dc3280aa96..799f079d25 100644
--- a/packages/jest-runner/.mocharc.jsonc
+++ b/packages/jest-runner/.mocharc.jsonc
@@ -1,3 +1,4 @@
 {
-  "require": "test/setup.js"
+  "require": "test/setup.js",
+  "timeout": 10000
 }
diff --git a/packages/karma-runner/.mocharc.jsonc b/packages/karma-runner/.mocharc.jsonc
index dc3280aa96..799f079d25 100644
--- a/packages/karma-runner/.mocharc.jsonc
+++ b/packages/karma-runner/.mocharc.jsonc
@@ -1,3 +1,4 @@
 {
-  "require": "test/setup.js"
+  "require": "test/setup.js",
+  "timeout": 10000
 }
diff --git a/packages/mocha-runner/.mocharc.jsonc b/packages/mocha-runner/.mocharc.jsonc
index dc3280aa96..799f079d25 100644
--- a/packages/mocha-runner/.mocharc.jsonc
+++ b/packages/mocha-runner/.mocharc.jsonc
@@ -1,3 +1,4 @@
 {
-  "require": "test/setup.js"
+  "require": "test/setup.js",
+  "timeout": 10000
 }
diff --git a/packages/typescript-checker/.mocharc.jsonc b/packages/typescript-checker/.mocharc.jsonc
index 8dedcc00ec..fd7a9c163b 100644
--- a/packages/typescript-checker/.mocharc.jsonc
+++ b/packages/typescript-checker/.mocharc.jsonc
@@ -1,3 +1,4 @@
 {
-  "require": ["dist/test/setup.js"]
+  "require": ["dist/test/setup.js"],
+  "timeout": 10000
 }
diff --git a/packages/typescript-checker/package.json b/packages/typescript-checker/package.json
index 79b6459b21..323fd99538 100644
--- a/packages/typescript-checker/package.json
+++ b/packages/typescript-checker/package.json
@@ -8,7 +8,7 @@
     "mocha": "mocha",
     "test:all": "npm run test:unit && npm run test:integration",
     "test:unit": "mocha 'dist/test/unit/**/*.js'",
-    "test:integration": "mocha --timeout 10000 'dist/test/integration/**/*.js'",
+    "test:integration": "mocha 'dist/test/integration/**/*.js'",
     "stryker": "node ../core/bin/stryker run"
   },
   "repository": {
diff --git a/packages/util/.mocharc.jsonc b/packages/util/.mocharc.jsonc
index 7aa86ca6b3..907a3f97fc 100644
--- a/packages/util/.mocharc.jsonc
+++ b/packages/util/.mocharc.jsonc
@@ -1,3 +1,4 @@
 {
-  "require": ["test/setup.js"]
+  "require": ["test/setup.js"],
+  "timeout": 10000
 }