diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 6a7de73..be54628 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -82,7 +82,7 @@ jobs:
         isort --check-only .
         
     - name: Run linting
-      run: flake8 .
+      run: flake8 . --count --max-complexity=10 --max-line-length=150
       
     - name: Run tests
       run: |
diff --git a/.gitea/workflows/service-adapters.yml b/.gitea/workflows/service-adapters.yml
index bea3081..2de6465 100644
--- a/.gitea/workflows/service-adapters.yml
+++ b/.gitea/workflows/service-adapters.yml
@@ -58,7 +58,7 @@ jobs:
     - name: Run linting
       run: |
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+        flake8 . --count --max-complexity=10 --max-line-length=150 --statistics
         
     - name: Run type checking
       run: mypy . --ignore-missing-imports
diff --git a/docs/progress.md b/docs/progress.md
index 2cb0716..765d952 100644
--- a/docs/progress.md
+++ b/docs/progress.md
@@ -214,6 +214,8 @@ The modular structure allows for easy addition of new services:
 - [x] Set up CI/CD pipelines for automated testing and deployment
 - [x] Fix Maven command not found error in CI/CD pipelines (Added Maven wrapper)
 - [x] Fix Python formatting issues in CI/CD pipelines (Applied Black and isort formatting)
+- [x] Update flake8 line length limit to 150 characters for better readability
+- [x] Create JavaScript/Node.js tests for API docs service and frontend
 
 ## Resources
 - [Project Specifications](specs.md)
diff --git a/frontend/src/App.test.js b/frontend/src/App.test.js
new file mode 100644
index 0000000..a964bdc
--- /dev/null
+++ b/frontend/src/App.test.js
@@ -0,0 +1,58 @@
+import React from 'react'
+import { render, screen } from '@testing-library/react'
+import App from './App'
+
+// Mock the service status hook to avoid API calls during tests
+jest.mock('./hooks/useServiceStatus', () => ({
+  useServiceStatus: () => ({
+    isOnline: true,
+    services: {
+      'api-gateway': { status: 'healthy', lastCheck: new Date().toISOString() },
+      'service-adapters': { status: 'healthy', lastCheck: new Date().toISOString() },
+      'api-docs': { status: 'healthy', lastCheck: new Date().toISOString() }
+    },
+    isLoading: false,
+    error: null
+  })
+}))
+
+// Mock the system data hook
+jest.mock('./hooks/useServiceStatus', () => ({
+  useSystemData: () => ({
+    systemStats: {
+      cpuUsage: 45.2,
+      memoryUsage: 2.1,
+      diskUsage: 75.8
+    },
+    recentEvents: [
+      {
+        id: '1',
+        timestamp: new Date().toISOString(),
+        service: 'api-gateway',
+        event_type: 'health_check',
+        metadata: 'Service is healthy'
+      }
+    ],
+    isLoading: false,
+    error: null
+  })
+}))
+
+describe('App Component', () => {
+  it('renders without crashing', () => {
+    render(<App />)
+    expect(screen.getByText(/LabFusion/i)).toBeInTheDocument()
+  })
+
+  it('renders the main dashboard', () => {
+    render(<App />)
+    // Check for common dashboard elements
+    expect(screen.getByText(/Dashboard/i)).toBeInTheDocument()
+  })
+
+  it('shows service status when online', () => {
+    render(<App />)
+    // Should show service status information
+    expect(screen.getByText(/Service Status/i)).toBeInTheDocument()
+  })
+})
diff --git a/frontend/src/utils/errorHandling.test.js b/frontend/src/utils/errorHandling.test.js
new file mode 100644
index 0000000..aacea89
--- /dev/null
+++ b/frontend/src/utils/errorHandling.test.js
@@ -0,0 +1,76 @@
+import { formatError, formatServiceData, formatEventData } from './errorHandling'
+
+describe('Error Handling Utils', () => {
+  describe('formatError', () => {
+    it('should format error objects correctly', () => {
+      const error = new Error('Test error message')
+      const formatted = formatError(error)
+      
+      expect(formatted).toHaveProperty('message', 'Test error message')
+      expect(formatted).toHaveProperty('type', 'Error')
+    })
+
+    it('should handle string errors', () => {
+      const error = 'Simple string error'
+      const formatted = formatError(error)
+      
+      expect(formatted).toHaveProperty('message', 'Simple string error')
+      expect(formatted).toHaveProperty('type', 'string')
+    })
+
+    it('should handle unknown error types', () => {
+      const error = { someProperty: 'value' }
+      const formatted = formatError(error)
+      
+      expect(formatted).toHaveProperty('message', 'Unknown error occurred')
+      expect(formatted).toHaveProperty('type', 'unknown')
+    })
+  })
+
+  describe('formatServiceData', () => {
+    it('should format service data correctly', () => {
+      const rawData = {
+        'api-gateway': {
+          status: 'healthy',
+          lastCheck: '2024-01-01T00:00:00.000Z'
+        }
+      }
+      
+      const formatted = formatServiceData(rawData)
+      
+      expect(formatted).toHaveProperty('api-gateway')
+      expect(formatted['api-gateway']).toHaveProperty('status', 'healthy')
+      expect(formatted['api-gateway']).toHaveProperty('lastCheck')
+    })
+
+    it('should handle empty data', () => {
+      const formatted = formatServiceData({})
+      expect(formatted).toEqual({})
+    })
+  })
+
+  describe('formatEventData', () => {
+    it('should format event data correctly', () => {
+      const rawEvents = [
+        {
+          id: '1',
+          timestamp: '2024-01-01T00:00:00.000Z',
+          service: 'api-gateway',
+          event_type: 'health_check'
+        }
+      ]
+      
+      const formatted = formatEventData(rawEvents)
+      
+      expect(Array.isArray(formatted)).toBe(true)
+      expect(formatted[0]).toHaveProperty('id', '1')
+      expect(formatted[0]).toHaveProperty('service', 'api-gateway')
+    })
+
+    it('should handle empty events array', () => {
+      const formatted = formatEventData([])
+      expect(Array.isArray(formatted)).toBe(true)
+      expect(formatted).toHaveLength(0)
+    })
+  })
+})
diff --git a/services/api-docs/__tests__/server.test.js b/services/api-docs/__tests__/server.test.js
new file mode 100644
index 0000000..e5878ed
--- /dev/null
+++ b/services/api-docs/__tests__/server.test.js
@@ -0,0 +1,172 @@
+const request = require('supertest')
+const app = require('../server')
+
+// Mock axios to avoid actual HTTP requests during tests
+jest.mock('axios')
+const axios = require('axios')
+
+describe('API Docs Service', () => {
+  let server
+
+  beforeAll(() => {
+    // Start the server for testing
+    server = app.listen(0) // Use random available port
+  })
+
+  afterAll((done) => {
+    // Close the server after tests
+    server.close(done)
+  })
+
+  describe('GET /health', () => {
+    it('should return health status', async () => {
+      const response = await request(app)
+        .get('/health')
+        .expect(200)
+
+      expect(response.body).toHaveProperty('status', 'healthy')
+      expect(response.body).toHaveProperty('timestamp')
+      expect(new Date(response.body.timestamp)).toBeInstanceOf(Date)
+    })
+  })
+
+  describe('GET /services', () => {
+    beforeEach(() => {
+      // Reset axios mocks
+      jest.clearAllMocks()
+    })
+
+    it('should return service status for all services', async () => {
+      // Mock successful health checks for active services
+      axios.get.mockImplementation((url) => {
+        if (url.includes('/health')) {
+          return Promise.resolve({
+            headers: { 'x-response-time': '50ms' }
+          })
+        }
+        return Promise.reject(new Error('Not found'))
+      })
+
+      const response = await request(app)
+        .get('/services')
+        .expect(200)
+
+      expect(response.body).toHaveProperty('api-gateway')
+      expect(response.body).toHaveProperty('service-adapters')
+      expect(response.body).toHaveProperty('metrics-collector')
+      expect(response.body).toHaveProperty('notification-service')
+
+      // Check structure of service status
+      Object.values(response.body).forEach(service => {
+        expect(service).toHaveProperty('name')
+        expect(service).toHaveProperty('url')
+        expect(service).toHaveProperty('status')
+      })
+    })
+
+    it('should handle service health check failures', async () => {
+      // Mock all health checks to fail
+      axios.get.mockRejectedValue(new Error('Connection refused'))
+
+      const response = await request(app)
+        .get('/services')
+        .expect(200)
+
+      // All services should show as unhealthy or planned
+      Object.values(response.body).forEach(service => {
+        expect(['unhealthy', 'planned']).toContain(service.status)
+        if (service.status === 'unhealthy') {
+          expect(service).toHaveProperty('error')
+        }
+      })
+    })
+  })
+
+  describe('GET /openapi.json', () => {
+    beforeEach(() => {
+      jest.clearAllMocks()
+    })
+
+    it('should return unified OpenAPI specification', async () => {
+      // Mock service spec responses
+      axios.get.mockImplementation((url) => {
+        if (url.includes('/v3/api-docs')) {
+          return Promise.resolve({
+            data: {
+              openapi: '3.0.0',
+              info: { title: 'API Gateway', version: '1.0.0' },
+              paths: { '/test': { get: { summary: 'Test endpoint' } } },
+              components: { schemas: {} }
+            }
+          })
+        }
+        if (url.includes('/openapi.json')) {
+          return Promise.resolve({
+            data: {
+              openapi: '3.0.0',
+              info: { title: 'Service Adapters', version: '1.0.0' },
+              paths: { '/health': { get: { summary: 'Health check' } } },
+              components: { schemas: {} }
+            }
+          })
+        }
+        return Promise.reject(new Error('Not found'))
+      })
+
+      const response = await request(app)
+        .get('/openapi.json')
+        .expect(200)
+
+      expect(response.body).toHaveProperty('openapi', '3.0.0')
+      expect(response.body).toHaveProperty('info')
+      expect(response.body).toHaveProperty('paths')
+      expect(response.body).toHaveProperty('components')
+      expect(response.body).toHaveProperty('tags')
+
+      // Check that paths are prefixed with service names
+      expect(response.body.paths).toHaveProperty('/api-gateway/test')
+      expect(response.body.paths).toHaveProperty('/service-adapters/health')
+    })
+
+    it('should handle service spec fetch failures gracefully', async () => {
+      // Mock all service spec requests to fail
+      axios.get.mockRejectedValue(new Error('Service unavailable'))
+
+      const response = await request(app)
+        .get('/openapi.json')
+        .expect(200)
+
+      expect(response.body).toHaveProperty('openapi', '3.0.0')
+      expect(response.body).toHaveProperty('info')
+      expect(response.body).toHaveProperty('paths')
+      expect(response.body).toHaveProperty('components')
+      expect(response.body).toHaveProperty('tags')
+
+      // Should still have tags for all services
+      expect(response.body.tags).toHaveLength(4)
+    })
+  })
+
+  describe('GET /api-docs.json', () => {
+    it('should return API docs service specification', async () => {
+      const response = await request(app)
+        .get('/api-docs.json')
+        .expect(200)
+
+      expect(response.body).toHaveProperty('openapi', '3.0.0')
+      expect(response.body).toHaveProperty('info')
+      expect(response.body.info).toHaveProperty('title', 'LabFusion API Docs Service')
+    })
+  })
+
+  describe('GET /', () => {
+    it('should serve Swagger UI', async () => {
+      const response = await request(app)
+        .get('/')
+        .expect(200)
+
+      expect(response.text).toContain('swagger-ui')
+      expect(response.text).toContain('LabFusion API Documentation')
+    })
+  })
+})
diff --git a/services/api-docs/jest.config.js b/services/api-docs/jest.config.js
new file mode 100644
index 0000000..cd22c54
--- /dev/null
+++ b/services/api-docs/jest.config.js
@@ -0,0 +1,13 @@
+module.exports = {
+  testEnvironment: 'node',
+  testMatch: ['**/__tests__/**/*.test.js', '**/?(*.)+(spec|test).js'],
+  collectCoverageFrom: [
+    'server.js',
+    '!node_modules/**',
+    '!coverage/**'
+  ],
+  coverageDirectory: 'coverage',
+  coverageReporters: ['text', 'lcov', 'html'],
+  testTimeout: 10000,
+  setupFilesAfterEnv: ['<rootDir>/jest.setup.js']
+}
diff --git a/services/api-docs/jest.setup.js b/services/api-docs/jest.setup.js
new file mode 100644
index 0000000..55938db
--- /dev/null
+++ b/services/api-docs/jest.setup.js
@@ -0,0 +1,18 @@
+// Jest setup file
+// This file runs before each test file
+
+// Mock console methods to reduce noise in tests
+global.console = {
+  ...console,
+  log: jest.fn(),
+  warn: jest.fn(),
+  error: jest.fn()
+}
+
+// Set test environment variables
+process.env.NODE_ENV = 'test'
+process.env.PORT = '8083'
+process.env.API_GATEWAY_URL = 'http://localhost:8080'
+process.env.SERVICE_ADAPTERS_URL = 'http://localhost:8000'
+process.env.METRICS_COLLECTOR_URL = 'http://localhost:8081'
+process.env.NOTIFICATION_SERVICE_URL = 'http://localhost:8082'
diff --git a/services/api-docs/package-lock.json b/services/api-docs/package-lock.json
index 8f3b15f..8bb6657 100644
--- a/services/api-docs/package-lock.json
+++ b/services/api-docs/package-lock.json
@@ -13,7 +13,7 @@
         "cors": "^2.8.5",
         "dotenv": "^17.2.2",
         "express": "^4.21.2",
-        "swagger-jsdoc": "^7.0.0-rc.6",
+        "swagger-jsdoc": "^6.2.8",
         "swagger-ui-express": "^5.0.0"
       },
       "devDependencies": {
@@ -55,9 +55,9 @@
       "license": "MIT"
     },
     "node_modules/@apidevtools/swagger-parser": {
-      "version": "10.0.2",
-      "resolved": "https://registry.npmjs.org/@apidevtools/swagger-parser/-/swagger-parser-10.0.2.tgz",
-      "integrity": "sha512-JFxcEyp8RlNHgBCE98nwuTkZT6eNFPc1aosWV6wPcQph72TSEEu1k3baJD4/x1qznU+JiDdz8F5pTwabZh+Dhg==",
+      "version": "10.0.3",
+      "resolved": "https://registry.npmjs.org/@apidevtools/swagger-parser/-/swagger-parser-10.0.3.tgz",
+      "integrity": "sha512-sNiLY51vZOmSPFZA5TF35KZ2HbgYklQnTSDnkghamzLb3EkNtcQnrBQEj5AOCxHpTtXpqMCRM1CrmV2rG6nw4g==",
       "license": "MIT",
       "dependencies": {
         "@apidevtools/json-schema-ref-parser": "^9.0.6",
@@ -65,7 +65,7 @@
         "@apidevtools/swagger-methods": "^3.0.2",
         "@jsdevtools/ono": "^7.1.3",
         "call-me-maybe": "^1.0.1",
-        "z-schema": "^4.2.3"
+        "z-schema": "^5.0.1"
       },
       "peerDependencies": {
         "openapi-types": ">=7"
@@ -2332,11 +2332,13 @@
       }
     },
     "node_modules/commander": {
-      "version": "2.20.3",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
-      "integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==",
+      "version": "6.2.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-6.2.0.tgz",
+      "integrity": "sha512-zP4jEKbe8SHzKJYQmq8Y9gYjtO/POJLgIdKgV7B9qNmABVFVc+ctqSX6iXh4mCpJfRBOabiZ2YKPg8ciDw6C+Q==",
       "license": "MIT",
-      "optional": true
+      "engines": {
+        "node": ">= 6"
+      }
     },
     "node_modules/component-emitter": {
       "version": "1.3.1",
@@ -7333,28 +7335,32 @@
       }
     },
     "node_modules/swagger-jsdoc": {
-      "version": "7.0.0-rc.6",
-      "resolved": "https://registry.npmjs.org/swagger-jsdoc/-/swagger-jsdoc-7.0.0-rc.6.tgz",
-      "integrity": "sha512-LIvIPQxipRaOzIij+HrWOcCWTINE6OeJuqmXCfDkofVcstPVABHRkaAc3D7vrX9s7L0ccH0sH0amwHgN6+SXPg==",
+      "version": "6.2.8",
+      "resolved": "https://registry.npmjs.org/swagger-jsdoc/-/swagger-jsdoc-6.2.8.tgz",
+      "integrity": "sha512-VPvil1+JRpmJ55CgAtn8DIcpBs0bL5L3q5bVQvF4tAW/k/9JYSj7dCpaYCAv5rufe0vcCbBRQXGvzpkWjvLklQ==",
       "license": "MIT",
       "dependencies": {
+        "commander": "6.2.0",
         "doctrine": "3.0.0",
         "glob": "7.1.6",
-        "lodash.mergewith": "4.6.2",
-        "swagger-parser": "10.0.2",
+        "lodash.mergewith": "^4.6.2",
+        "swagger-parser": "^10.0.3",
         "yaml": "2.0.0-1"
       },
+      "bin": {
+        "swagger-jsdoc": "bin/swagger-jsdoc.js"
+      },
       "engines": {
         "node": ">=12.0.0"
       }
     },
     "node_modules/swagger-parser": {
-      "version": "10.0.2",
-      "resolved": "https://registry.npmjs.org/swagger-parser/-/swagger-parser-10.0.2.tgz",
-      "integrity": "sha512-9jHkHM+QXyLGFLk1DkXBwV+4HyNm0Za3b8/zk/+mjr8jgOSiqm3FOTHBSDsBjtn9scdL+8eWcHdupp2NLM8tDw==",
+      "version": "10.0.3",
+      "resolved": "https://registry.npmjs.org/swagger-parser/-/swagger-parser-10.0.3.tgz",
+      "integrity": "sha512-nF7oMeL4KypldrQhac8RyHerJeGPD1p2xDh900GPvc+Nk7nWP6jX2FcC7WmkinMoAmoO774+AFXcWsW8gMWEIg==",
       "license": "MIT",
       "dependencies": {
-        "@apidevtools/swagger-parser": "10.0.2"
+        "@apidevtools/swagger-parser": "10.0.3"
       },
       "engines": {
         "node": ">=10"
@@ -7965,23 +7971,33 @@
       }
     },
     "node_modules/z-schema": {
-      "version": "4.2.4",
-      "resolved": "https://registry.npmjs.org/z-schema/-/z-schema-4.2.4.tgz",
-      "integrity": "sha512-YvBeW5RGNeNzKOUJs3rTL4+9rpcvHXt5I051FJbOcitV8bl40pEfcG0Q+dWSwS0/BIYrMZ/9HHoqLllMkFhD0w==",
+      "version": "5.0.5",
+      "resolved": "https://registry.npmjs.org/z-schema/-/z-schema-5.0.5.tgz",
+      "integrity": "sha512-D7eujBWkLa3p2sIpJA0d1pr7es+a7m0vFAnZLlCEKq/Ij2k0MLi9Br2UPxoxdYystm5K1yeBGzub0FlYUEWj2Q==",
       "license": "MIT",
       "dependencies": {
         "lodash.get": "^4.4.2",
         "lodash.isequal": "^4.5.0",
-        "validator": "^13.6.0"
+        "validator": "^13.7.0"
       },
       "bin": {
         "z-schema": "bin/z-schema"
       },
       "engines": {
-        "node": ">=6.0.0"
+        "node": ">=8.0.0"
       },
       "optionalDependencies": {
-        "commander": "^2.7.1"
+        "commander": "^9.4.1"
+      }
+    },
+    "node_modules/z-schema/node_modules/commander": {
+      "version": "9.5.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-9.5.0.tgz",
+      "integrity": "sha512-KRs7WVDKg86PWiuAqhDrAQnTXZKraVcCc6vFdL14qrZ/DcWwuRo7VoiYXalXO7S5GKpqYiVEwCbgFDfxNHKJBQ==",
+      "license": "MIT",
+      "optional": true,
+      "engines": {
+        "node": "^12.20.0 || >=14"
       }
     }
   }
diff --git a/services/api-docs/package.json b/services/api-docs/package.json
index 14eaa7d..b6b337e 100644
--- a/services/api-docs/package.json
+++ b/services/api-docs/package.json
@@ -18,7 +18,7 @@
     "cors": "^2.8.5",
     "dotenv": "^17.2.2",
     "express": "^4.21.2",
-    "swagger-jsdoc": "^7.0.0-rc.6",
+    "swagger-jsdoc": "^6.2.8",
     "swagger-ui-express": "^5.0.0"
   },
   "devDependencies": {
diff --git a/services/api-docs/server.js b/services/api-docs/server.js
index f1d1f16..95375e7 100644
--- a/services/api-docs/server.js
+++ b/services/api-docs/server.js
@@ -324,8 +324,13 @@ app.get('/', swaggerUi.setup(null, {
   customSiteTitle: 'LabFusion API Documentation'
 }))
 
-// Start server
-app.listen(PORT, () => {
-  console.log(`LabFusion API Docs server running on port ${PORT}`)
-  console.log(`Access the documentation at: http://localhost:${PORT}`)
-})
+// Export app for testing
+module.exports = app
+
+// Start server only if not in test environment
+if (process.env.NODE_ENV !== 'test') {
+  app.listen(PORT, () => {
+    console.log(`LabFusion API Docs server running on port ${PORT}`)
+    console.log(`Access the documentation at: http://localhost:${PORT}`)
+  })
+}