diff --git a/.github/docker-compose.yml b/.github/docker-compose.yml
index 4482ab6222..8ecbc6406e 100644
--- a/.github/docker-compose.yml
+++ b/.github/docker-compose.yml
@@ -2,15 +2,21 @@ version: '3.9'
 
 services:
   mysql:
-    image: mysql:5.7-debian
+    image: mysql:5.7
     environment:
       - MYSQL_DATABASE=n8n
       - MYSQL_ROOT_PASSWORD=password
     ports:
       - 3306:3306
+    ulimits:
+      nproc: 65535
+      nofile:
+        soft: 26677
+        hard: 46677
 
   postgres:
     image: postgres:11
+    restart: always
     environment:
       - POSTGRES_DB=n8n
       - POSTGRES_USER=root
diff --git a/.github/workflows/ci-postgres-mysql.yml b/.github/workflows/ci-postgres-mysql.yml
index 3d21953466..2e8465351e 100644
--- a/.github/workflows/ci-postgres-mysql.yml
+++ b/.github/workflows/ci-postgres-mysql.yml
@@ -9,45 +9,99 @@ on:
       - packages/cli/src/databases/migrations/**
 
 jobs:
-  test:
+  build:
+    name: Install & Build
     runs-on: ubuntu-latest
-
-    timeout-minutes: 60
-
-    env:
-      DB_MYSQLDB_PASSWORD: password
-      DB_POSTGRESDB_PASSWORD: password
-
     steps:
       - uses: actions/checkout@v3.5.3
-
       - uses: pnpm/action-setup@v2.4.0
-
       - uses: actions/setup-node@v3.7.0
         with:
           node-version: 18.x
           cache: 'pnpm'
+      - run: pnpm install --frozen-lockfile
 
-      - name: Install dependencies
-        run: pnpm install --frozen-lockfile
+      - name: Build Backend
+        run: pnpm  --filter @n8n/client-oauth2 --filter n8n-workflow --filter n8n-core --filter n8n build
 
-      - name: Start MySQL & Postgres
-        uses: isbang/compose-action@v1.3.2
+      - name: Cache build artifacts
+        uses: actions/cache/save@v3.3.1
+        with:
+          path: ./packages/**/dist
+          key: ${{ github.sha }}:db-tests
+
+  mysql:
+    name: MySQL
+    runs-on: ubuntu-latest
+    needs: build
+    timeout-minutes: 20
+    env:
+      DB_MYSQLDB_PASSWORD: password
+    steps:
+      - uses: actions/checkout@v3.5.3
+      - uses: pnpm/action-setup@v2.4.0
+      - uses: actions/setup-node@v3.7.0
+        with:
+          node-version: 18.x
+          cache: 'pnpm'
+      - run: pnpm install --frozen-lockfile
+
+      - name: Restore cached build artifacts
+        uses: actions/cache/restore@v3.3.1
+        with:
+          path: ./packages/**/dist
+          key: ${{ github.sha }}:db-tests
+
+      - name: Start MySQL
+        uses: isbang/compose-action@v1.5.1
         with:
           compose-file: ./.github/docker-compose.yml
-
-      - name: Build Core, Workflow, and CLI
-        run: pnpm  --filter @n8n/client-oauth2 --filter n8n-workflow --filter n8n-core --filter n8n build
+          services: |
+            mysql
 
       - name: Test MySQL
         working-directory: packages/cli
-        run: DB_TABLE_PREFIX=test_ pnpm test:mysql
+        run: DB_TABLE_PREFIX=test_ pnpm test:mysql --runInBand
+
+  postgres:
+    name: Postgres
+    runs-on: ubuntu-latest
+    needs: build
+    timeout-minutes: 20
+    env:
+      DB_POSTGRESDB_PASSWORD: password
+    steps:
+      - uses: actions/checkout@v3.5.3
+      - uses: pnpm/action-setup@v2.4.0
+      - uses: actions/setup-node@v3.7.0
+        with:
+          node-version: 18.x
+          cache: 'pnpm'
+      - run: pnpm install --frozen-lockfile
+
+      - name: Restore cached build artifacts
+        uses: actions/cache/restore@v3.3.1
+        with:
+          path: ./packages/**/dist
+          key: ${{ github.sha }}:db-tests
+
+      - name: Start Postgres
+        uses: isbang/compose-action@v1.5.1
+        with:
+          compose-file: ./.github/docker-compose.yml
+          services: |
+            postgres
 
       - name: Test Postgres
         working-directory: packages/cli
-        run: DB_POSTGRESDB_SCHEMA=alt_schema DB_TABLE_PREFIX=test_ pnpm test:postgres
+        run: DB_POSTGRESDB_SCHEMA=alt_schema DB_TABLE_PREFIX=test_ pnpm test:postgres --runInBand
 
-      - name: Notify Slack on master failure
+  notify-on-failure:
+    name: Notify Slack on failure
+    runs-on: ubuntu-latest
+    needs: [mysql, postgres]
+    steps:
+      - name: Notify Slack on failure
         uses: act10ns/slack@v2.0.0
         if: failure() && github.ref == 'refs/heads/master'
         with:
diff --git a/jest.config.js b/jest.config.js
index 7752aecad0..a4c416f152 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -1,5 +1,6 @@
 const { compilerOptions } = require('./tsconfig.json');
 
+/** @type {import('ts-jest').TsJestGlobalOptions} */
 const tsJestOptions = {
 	isolatedModules: true,
 	tsconfig: {
diff --git a/packages/cli/test/integration/credentials.test.ts b/packages/cli/test/integration/credentials.test.ts
index 526d3bb28c..b62f0e9cab 100644
--- a/packages/cli/test/integration/credentials.test.ts
+++ b/packages/cli/test/integration/credentials.test.ts
@@ -124,12 +124,10 @@ describe('POST /credentials', () => {
 	});
 
 	test('should fail with invalid inputs', async () => {
-		await Promise.all(
-			INVALID_PAYLOADS.map(async (invalidPayload) => {
-				const response = await authOwnerAgent.post('/credentials').send(invalidPayload);
-				expect(response.statusCode).toBe(400);
-			}),
-		);
+		for (const invalidPayload of INVALID_PAYLOADS) {
+			const response = await authOwnerAgent.post('/credentials').send(invalidPayload);
+			expect(response.statusCode).toBe(400);
+		}
 	});
 
 	test('should fail with missing encryption key', async () => {
@@ -370,18 +368,16 @@ describe('PATCH /credentials/:id', () => {
 	test('should fail with invalid inputs', async () => {
 		const savedCredential = await saveCredential(randomCredentialPayload(), { user: owner });
 
-		await Promise.all(
-			INVALID_PAYLOADS.map(async (invalidPayload) => {
-				const response = await authOwnerAgent
-					.patch(`/credentials/${savedCredential.id}`)
-					.send(invalidPayload);
+		for (const invalidPayload of INVALID_PAYLOADS) {
+			const response = await authOwnerAgent
+				.patch(`/credentials/${savedCredential.id}`)
+				.send(invalidPayload);
 
-				if (response.statusCode === 500) {
-					console.log(response.statusCode, response.body);
-				}
-				expect(response.statusCode).toBe(400);
-			}),
-		);
+			if (response.statusCode === 500) {
+				console.log(response.statusCode, response.body);
+			}
+			expect(response.statusCode).toBe(400);
+		}
 	});
 
 	test('should fail if cred not found', async () => {