diff --git a/e2e/helpers.ts b/e2e/helpers.ts
index 9a77db5ca4..810c2d3112 100644
--- a/e2e/helpers.ts
+++ b/e2e/helpers.ts
@@ -43,13 +43,15 @@ export async function expectMetricsResult(expectedMetricsResult: Partial<Metrics
 
 export async function expectMetrics(expectedMetrics: Partial<Metrics>) {
   const actualMetricsResult = await readMutationTestResult();
+  const actualMetrics: Partial<Metrics> = {};
   Object.entries(expectedMetrics).forEach(([key, value]) => {
     if (key === 'mutationScore' || key === 'mutationScoreBasedOnCoveredCode') {
-      expect(parseFloat(actualMetricsResult.metrics[key].toFixed(2))).eq(value);
+      actualMetrics[key] = parseFloat(actualMetricsResult.metrics[key].toFixed(2));
     } else {
-      expect(actualMetricsResult.metrics).property(key, value);
+      actualMetrics[key as keyof Metrics] = value;
     }
   });
+  expect(actualMetrics).deep.eq(expectedMetrics);
 }
 
 export function produceMetrics(metrics: Partial<Metrics>): Metrics {
diff --git a/e2e/test/jest-with-ts/package.json b/e2e/test/jest-with-ts/package.json
index 0d0c6b2fc1..e987db70fb 100644
--- a/e2e/test/jest-with-ts/package.json
+++ b/e2e/test/jest-with-ts/package.json
@@ -1,6 +1,6 @@
 {
   "name": "jest-with-ts",
-  "description": "A test project for using stryker with jest and jest-ts preprocessor",
+  "description": "A test project for using stryker with jest and jest-ts preprocessor. Inspired by the stryker-dashboard source code.",
   "scripts": {
     "test": "stryker run",
     "posttest": "mocha --require ../../tasks/ts-node-register.js verify/verify.ts"
diff --git a/e2e/test/jest-with-ts/src/data-access/mappers/TableStorageMapper.test.ts b/e2e/test/jest-with-ts/src/data-access/mappers/TableStorageMapper.test.ts
index 097ff6eb2e..3b4a817030 100644
--- a/e2e/test/jest-with-ts/src/data-access/mappers/TableStorageMapper.test.ts
+++ b/e2e/test/jest-with-ts/src/data-access/mappers/TableStorageMapper.test.ts
@@ -9,9 +9,9 @@ import { OptimisticConcurrencyError } from '../errors';
 jest.mock('../services/TableServiceAsPromised');
 
 export class FooModel {
-  public partitionId: string;
-  public rowId: string;
-  public bar: number;
+  public partitionId!: string;
+  public rowId!: string;
+  public bar!: number;
 
   public static createPartitionKey(entity: Pick<FooModel, 'partitionId'>): string {
     return entity.partitionId;
@@ -136,7 +136,7 @@ describe(TableStorageMapper.name, () => {
       TableServiceAsPromisedModuleMocked.insertEntityMock.mockResolvedValue({ ['.metadata']: { etag: 'next-etag' } });
       const expected: FooModel = { bar: 42, partitionId: 'partId', rowId: 'rowId' };
       const expectedResult: Result<FooModel> = { model: expected, etag: 'next-etag' };
-      const result = await helper.sut.insert(expected);
+      const result: Result<FooModel> = await helper.sut.insert(expected);
       expect(result).toEqual(expectedResult);
       expect(TableServiceAsPromisedModuleMocked.insertEntityMock).toHaveBeenCalledWith(FooModel.tableName, createRawEntity(expected), {});
     });
diff --git a/e2e/test/jest-with-ts/src/data-access/mappers/TableStorageMapper.ts b/e2e/test/jest-with-ts/src/data-access/mappers/TableStorageMapper.ts
index d3cbd09686..2c0fa47f2a 100644
--- a/e2e/test/jest-with-ts/src/data-access/mappers/TableStorageMapper.ts
+++ b/e2e/test/jest-with-ts/src/data-access/mappers/TableStorageMapper.ts
@@ -67,7 +67,7 @@ export default class TableStorageMapper<TModel extends object, TPartitionKeyFiel
     }
   }
 
-  public async insert(model: TModel): Promise<Result<TModel>> {
+  public async insert(model: TModel) {
     const entity = this.toEntity(model);
     try {
       const result = await this.tableService.insertEntity(this.ModelClass.tableName, entity, {});
diff --git a/e2e/test/jest-with-ts/tsconfig.json b/e2e/test/jest-with-ts/tsconfig.json
index ee7762d7d3..69ba96b8c4 100644
--- a/e2e/test/jest-with-ts/tsconfig.json
+++ b/e2e/test/jest-with-ts/tsconfig.json
@@ -8,6 +8,7 @@
     "types": [
       "jest"
     ],
+    "strict": true,
     "typeRoots": [
       "./node_modules/@types"
     ],
diff --git a/e2e/test/jest-with-ts/verify/verify.ts b/e2e/test/jest-with-ts/verify/verify.ts
index 64890c0d5f..403ac5e614 100644
--- a/e2e/test/jest-with-ts/verify/verify.ts
+++ b/e2e/test/jest-with-ts/verify/verify.ts
@@ -7,7 +7,7 @@ describe('Verify stryker has ran correctly', () => {
     await expectMetrics({
       ignored: 0,
       killed: 26,
-      mutationScore: 66.67,
+      mutationScore: 54.55,
       noCoverage: 0,
       survived: 13,
       timeout: 0,