diff --git a/test/unit/middleware/common.middleware.test.js b/test/unit/middleware/common.middleware.test.js
index 64d92360..2c2e24d2 100644
--- a/test/unit/middleware/common.middleware.test.js
+++ b/test/unit/middleware/common.middleware.test.js
@@ -1,5 +1,95 @@
-import { describe, it, expect } from 'vitest'
-import { pullOutDatasetSpecification } from '../../../src/middleware/common.middleware'
+import { describe, it, expect, vi } from 'vitest'
+import { formatErrorSummaryParams, isResourceAccessible, isResourceIdNotInParams, isResourceNotAccessible, logPageError, pullOutDatasetSpecification, reformatIssuesToBeByEntryNumber, takeResourceIdFromParams } from '../../../src/middleware/common.middleware'
+import logger from '../../../src/utils/logger'
+
+vi.mock('../../../src/utils/logger')
+
+describe('logPageError', () => {
+  it('logs an error with handlerName', () => {
+    const loggerMock = vi.fn()
+    logger.warn = loggerMock
+
+    const err = new Error('Test error')
+    const req = { handlerName: 'testHandler', originalUrl: '/test' }
+    const res = {}
+    const next = vi.fn()
+    logPageError(err, req, res, next)
+    expect(loggerMock).toHaveBeenCalledTimes(1)
+    expect(next).toHaveBeenCalledTimes(1)
+  })
+})
+
+describe('resource middleware', () => {
+  describe('isResourceAccessible', () => {
+    it('returns true if resourceStatus is 200', () => {
+      const req = { resourceStatus: { status: '200' } }
+      expect(isResourceAccessible(req)).toBe(true)
+    })
+    it('returns false if resourceStatus is not 200', () => {
+      const req = { resourceStatus: { status: '404' } }
+      expect(isResourceAccessible(req)).toBe(false)
+    })
+  })
+
+  describe('isResourceNotAccessible', () => {
+    it('returns false if resourceStatus is 200', () => {
+      const req = { resourceStatus: { status: '200' } }
+      expect(isResourceNotAccessible(req)).toBe(false)
+    })
+    it('returns true if resourceStatus is not 200', () => {
+      const req = { resourceStatus: { status: '404' } }
+      expect(isResourceNotAccessible(req)).toBe(true)
+    })
+  })
+
+  describe('isResourceIdNotInParams', () => {
+    it('returns true if resourceId is in params', () => {
+      const req = { params: { resourceId: 'testId' } }
+      expect(isResourceIdNotInParams(req)).toBe(false)
+    })
+    it('returns false if resourceId is not in params', () => {
+      const req = { params: {} }
+      expect(isResourceIdNotInParams(req)).toBe(true)
+    })
+  })
+
+  describe('takeResourceIdFromParams', () => {
+    it('takes the resourceId from params', () => {
+      const req = { params: { resourceId: 'testId' } }
+      takeResourceIdFromParams(req)
+      expect(req.resource).toEqual({ resource: 'testId' })
+    })
+  })
+})
+
+describe('reformatIssuesToBeByEntryNumber', () => {
+  it('reformats the issues by entry number', async () => {
+    const req = { issues: [{ entry_number: '1', issue: 'testIssue' }, { entry_number: '1', issue: 'testIssue2' }, { entry_number: '2', issue: 'testIssue3' }] }
+    const res = {}
+    const next = vi.fn()
+    await reformatIssuesToBeByEntryNumber(req, res, next)
+    expect(req.issuesByEntryNumber).toBeDefined()
+    expect(req.issuesByEntryNumber['1']).toHaveLength(2)
+    expect(req.issuesByEntryNumber['2']).toHaveLength(1)
+  })
+})
+
+describe('formatErrorSummaryParams', () => {
+  it('formats the error summary params', async () => {
+    const req = {
+      params: { lpa: 'testLpa', dataset: 'testDataset', issue_type: 'testIssueType', issue_field: 'testIssueField' },
+      issuesByEntryNumber: { 1: [{ issue: 'testIssue' }], 2: [{ issue: 'testIssue2' }] },
+      entityCount: { entity_count: 10 },
+      issueEntitiesCount: 5
+    }
+    const res = {}
+    const next = vi.fn()
+    formatErrorSummaryParams(req, res, next)
+    expect(req.errorSummary).toBeDefined()
+    expect(req.errorSummary.heading).toBeDefined()
+    expect(req.errorSummary.items).toHaveLength(2)
+  })
+})
 
 describe('pullOutDatasetSpecification', () => {
   const req = {
@@ -15,7 +105,7 @@ describe('pullOutDatasetSpecification', () => {
   }
   const res = {}
 
-  it('', () => {
+  it('pulls out the data specification', () => {
     const reqWithSpecification = {
       ...req,
       specification: {