diff --git a/.vscode/launch.json b/.vscode/launch.json
index 7663b9048d..8dec3a74cd 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -10,8 +10,6 @@
       "name": "Stryker unit tests",
       "program": "${workspaceRoot}/node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -26,8 +24,6 @@
       "name": "Stryker-mocha-framework unit tests",
       "program": "${workspaceRoot}/node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -42,8 +38,6 @@
       "name": "babel-transpiler unit tests",
       "program": "${workspaceRoot}/node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -58,8 +52,6 @@
       "name": "javascript-mutator unit tests",
       "program": "${workspaceRoot}/node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/helpers/bootstrap-local-dependencies.ts b/helpers/bootstrap-local-dependencies.ts
index ec41de7535..25c24d999c 100644
--- a/helpers/bootstrap-local-dependencies.ts
+++ b/helpers/bootstrap-local-dependencies.ts
@@ -1,5 +1,5 @@
 import { ListByPackage, LocalInstaller, progress } from 'install-local';
-import { fs } from 'mz';
+import * as fs from 'fs';
 import glob = require('glob');
 import path = require('path');
 
@@ -17,6 +17,16 @@ function globAsPromised(pattern: string, options: glob.IOptions) {
   });
 }
 
+function readFile(fileName: string) {
+  return new Promise<string>((res, rej) => fs.readFile(fileName, 'utf8', (err, content) => {
+    if (err) {
+      rej(err);
+    } else {
+      res(content);
+    }
+  }));
+}
+
 interface Package {
   localDependencies?: { [name: string]: string };
 }
@@ -29,7 +39,7 @@ interface Package {
 export async function bootstrapLocalDependencies(directory: string) {
   console.log('bootstrap ' + path.resolve(directory));
   const files = await globAsPromised('{package.json,test/*/package.json}', { cwd: path.resolve(directory) });
-  const packages = await Promise.all(files.map(fileName => fs.readFile(fileName, 'utf8')
+  const packages = await Promise.all(files.map(fileName => readFile(fileName)
     .then(content => ({ dir: path.dirname(fileName), content: JSON.parse(content) as Package }))));
   const sourcesByTarget: ListByPackage = {};
   for (const pkg of packages) {
diff --git a/package.json b/package.json
index 0d11918fe3..c67a84e109 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "jasmine-core": "^3.1.0",
     "lerna": "^3.10.7",
     "link-parent-bin": "~1.0.0",
-    "mocha": "^5.2.0",
+    "mocha": "^6.1.2",
     "nyc": "^13.0.1",
     "rimraf": "^2.6.1",
     "rxjs": "^6.4.0",
@@ -36,8 +36,7 @@
     "sinon-chai": "^3.2.0",
     "source-map-support": "^0.5.6",
     "tslint": "~5.15.0",
-    "typescript": "^3.3.1",
-    "web-component-tester": "6.9.2"
+    "typescript": "^3.3.1"
   },
   "prettier": {
     "singleQuote": true
diff --git a/packages/api/.vscode/launch.json b/packages/api/.vscode/launch.json
index fa1c133469..090eaac215 100644
--- a/packages/api/.vscode/launch.json
+++ b/packages/api/.vscode/launch.json
@@ -7,8 +7,6 @@
       "name": "Integration tests",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -27,8 +25,6 @@
       "name": "Unit tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/packages/babel-transpiler/.vscode/launch.json b/packages/babel-transpiler/.vscode/launch.json
index 754e131bbb..015f50a5c7 100644
--- a/packages/babel-transpiler/.vscode/launch.json
+++ b/packages/babel-transpiler/.vscode/launch.json
@@ -7,8 +7,6 @@
       "name": "Unit tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -26,8 +24,6 @@
       "name": "Integration tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/packages/core/.vscode/launch.json b/packages/core/.vscode/launch.json
index 35cab8d458..8c8fbd9f80 100644
--- a/packages/core/.vscode/launch.json
+++ b/packages/core/.vscode/launch.json
@@ -7,8 +7,6 @@
       "name": "Unit tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -55,8 +53,6 @@
       "name": "Integration tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/packages/html-reporter/.vscode/launch.json b/packages/html-reporter/.vscode/launch.json
index 05ecdf854a..4bcde6fd7b 100644
--- a/packages/html-reporter/.vscode/launch.json
+++ b/packages/html-reporter/.vscode/launch.json
@@ -23,8 +23,6 @@
       "name": "Run unit tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -43,8 +41,6 @@
       "name": "Run integration tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/packages/jasmine-framework/.vscode/launch.json b/packages/jasmine-framework/.vscode/launch.json
index a949b9d86f..570048043d 100644
--- a/packages/jasmine-framework/.vscode/launch.json
+++ b/packages/jasmine-framework/.vscode/launch.json
@@ -10,8 +10,6 @@
       "name": "Unit tests",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -30,8 +28,6 @@
       "name": "Integration tests",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/packages/jasmine-runner/.vscode/launch.json b/packages/jasmine-runner/.vscode/launch.json
index a949b9d86f..570048043d 100644
--- a/packages/jasmine-runner/.vscode/launch.json
+++ b/packages/jasmine-runner/.vscode/launch.json
@@ -10,8 +10,6 @@
       "name": "Unit tests",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -30,8 +28,6 @@
       "name": "Integration tests",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/packages/javascript-mutator/.vscode/launch.json b/packages/javascript-mutator/.vscode/launch.json
index 754e131bbb..015f50a5c7 100644
--- a/packages/javascript-mutator/.vscode/launch.json
+++ b/packages/javascript-mutator/.vscode/launch.json
@@ -7,8 +7,6 @@
       "name": "Unit tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -26,8 +24,6 @@
       "name": "Integration tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/packages/jest-runner/.vscode/launch.json b/packages/jest-runner/.vscode/launch.json
index a949b9d86f..570048043d 100644
--- a/packages/jest-runner/.vscode/launch.json
+++ b/packages/jest-runner/.vscode/launch.json
@@ -10,8 +10,6 @@
       "name": "Unit tests",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -30,8 +28,6 @@
       "name": "Integration tests",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/packages/karma-runner/.vscode/launch.json b/packages/karma-runner/.vscode/launch.json
index 0217431bfa..c139f57d7b 100644
--- a/packages/karma-runner/.vscode/launch.json
+++ b/packages/karma-runner/.vscode/launch.json
@@ -18,8 +18,6 @@
       "name": "Unit tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -38,8 +36,6 @@
       "name": "Integration tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/packages/mocha-runner/.vscode/launch.json b/packages/mocha-runner/.vscode/launch.json
index a949b9d86f..570048043d 100644
--- a/packages/mocha-runner/.vscode/launch.json
+++ b/packages/mocha-runner/.vscode/launch.json
@@ -10,8 +10,6 @@
       "name": "Unit tests",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -30,8 +28,6 @@
       "name": "Integration tests",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/packages/typescript/.vscode/launch.json b/packages/typescript/.vscode/launch.json
index 754e131bbb..015f50a5c7 100644
--- a/packages/typescript/.vscode/launch.json
+++ b/packages/typescript/.vscode/launch.json
@@ -7,8 +7,6 @@
       "name": "Unit tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -26,8 +24,6 @@
       "name": "Integration tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/packages/util/.vscode/launch.json b/packages/util/.vscode/launch.json
index a949b9d86f..570048043d 100644
--- a/packages/util/.vscode/launch.json
+++ b/packages/util/.vscode/launch.json
@@ -10,8 +10,6 @@
       "name": "Unit tests",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -30,8 +28,6 @@
       "name": "Integration tests",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/packages/vue-mutator/.vscode/launch.json b/packages/vue-mutator/.vscode/launch.json
index 754e131bbb..015f50a5c7 100644
--- a/packages/vue-mutator/.vscode/launch.json
+++ b/packages/vue-mutator/.vscode/launch.json
@@ -7,8 +7,6 @@
       "name": "Unit tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -26,8 +24,6 @@
       "name": "Integration tests",
       "program": "${workspaceRoot}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/packages/wct-runner/.vscode/launch.json b/packages/wct-runner/.vscode/launch.json
index a93c44ec43..88b32c3498 100644
--- a/packages/wct-runner/.vscode/launch.json
+++ b/packages/wct-runner/.vscode/launch.json
@@ -7,8 +7,6 @@
       "name": "Integration test",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -31,8 +29,6 @@
       "name": "Unit test",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
diff --git a/packages/wct-runner/package.json b/packages/wct-runner/package.json
index 40b17ddd48..3a259238b4 100644
--- a/packages/wct-runner/package.json
+++ b/packages/wct-runner/package.json
@@ -28,7 +28,11 @@
   },
   "devDependencies": {
     "@stryker-mutator/test-helpers": "^1.2.0",
-    "@types/socket.io": "^2.1.0"
+    "@types/socket.io": "^2.1.0",
+    "chai": "~4.2.0",
+    "mocha": "~5.2.0",
+    "sinon": "^7.3.1",
+    "web-component-tester": "~6.9.2"
   },
   "peerDependencies": {
     "@stryker-mutator/core": "^1.0.0",
diff --git a/packages/wct-runner/test/integration/WctTestRunner.it.spec.ts b/packages/wct-runner/test/integration/WctTestRunner.it.spec.ts
index f89879c66d..f1af00edf8 100644
--- a/packages/wct-runner/test/integration/WctTestRunner.it.spec.ts
+++ b/packages/wct-runner/test/integration/WctTestRunner.it.spec.ts
@@ -16,7 +16,7 @@ describe('WctTestRunner integration', () => {
   // The "root" wct configuration option is always loaded from the current directory.
   // In order to test it properly, we need to grab it before- and reset it after each test.
   let cwd: string;
-  const root = path.resolve(__dirname, '..', '..', '..', '..');
+  const root = path.resolve(__dirname, '..', '..');
 
   function createSut(): WctTestRunner {
     return testInjector.injector.injectClass(WctTestRunner);
@@ -27,7 +27,7 @@ describe('WctTestRunner integration', () => {
     tests: [
       { name: '<awesome-element> is awesome', status: TestStatus.Success, failureMessages: undefined },
       { name: '<failing-element> is failing', status: TestStatus.Failed, failureMessages: ['expected true to be false'] },
-      { name: '<failing-element> is throwing', status: TestStatus.Failed, failureMessages: ['This element is failing HTMLElement.throw at /components/stryker-parent/packages/wct-runner/testResources/htmlTestSuite/src/failing-element.js:11'] }
+      { name: '<failing-element> is throwing', status: TestStatus.Failed, failureMessages: ['This element is failing HTMLElement.throw at /components/@stryker-mutator/wct-runner/testResources/htmlTestSuite/src/failing-element.js:11'] }
     ]
   };
   // To enable console logging: LoggerFactory.setLogImplementation(consoleLoggerFactory);
@@ -104,7 +104,7 @@ describe('WctTestRunner integration', () => {
     const sut = createSut();
     const expectedResult: TimelessRunResult = {
       status: RunStatus.Complete, // We want to actually expect an error here, but wct doesn't let is.
-      tests: [{ name: '', status: TestStatus.Failed, failureMessages: ['Random error <unknown> at /components/stryker-parent/packages/wct-runner/testResources/garbage/test/gargbage-tests.js:1'] }]
+      tests: [{ name: '', status: TestStatus.Failed, failureMessages: ['Random error <unknown> at /components/@stryker-mutator/wct-runner/testResources/garbage/test/gargbage-tests.js:1'] }]
     };
 
     // Act
diff --git a/packages/wct-runner/testResources/garbage/wct.conf.json b/packages/wct-runner/testResources/garbage/wct.conf.json
index 81350ac8f6..7881715d64 100644
--- a/packages/wct-runner/testResources/garbage/wct.conf.json
+++ b/packages/wct-runner/testResources/garbage/wct.conf.json
@@ -1,6 +1,6 @@
 {
   "verbose": true,
-  "suites": ["packages/wct-runner/testResources/garbage/test"],
+  "suites": ["testResources/garbage/test"],
   "plugins": {
     "local": {
       "browsers": ["chrome"],
@@ -12,5 +12,5 @@
     }
   },
   "npm": true,
-  "root": "../../../../.."
+  "root": "../../.."
 }
\ No newline at end of file
diff --git a/packages/wct-runner/testResources/htmlTestSuite/wct.conf.json b/packages/wct-runner/testResources/htmlTestSuite/wct.conf.json
index d36e953993..48dd307a62 100644
--- a/packages/wct-runner/testResources/htmlTestSuite/wct.conf.json
+++ b/packages/wct-runner/testResources/htmlTestSuite/wct.conf.json
@@ -1,7 +1,7 @@
 {
   "verbose": true,
   "suites": [
-    "packages/wct-runner/testResources/htmlTestSuite/test"
+    "testResources/htmlTestSuite/test"
   ],
   "plugins": {
     "local": {
@@ -16,5 +16,5 @@
     }
   },
   "npm": true,
-  "root": "../../../.."
+  "root": "../.."
 }
\ No newline at end of file
diff --git a/packages/wct-runner/testResources/jsTestSuite/wct.conf.json b/packages/wct-runner/testResources/jsTestSuite/wct.conf.json
index b1782f904e..ca700ee90d 100644
--- a/packages/wct-runner/testResources/jsTestSuite/wct.conf.json
+++ b/packages/wct-runner/testResources/jsTestSuite/wct.conf.json
@@ -1,6 +1,6 @@
 {
   "verbose": true,
-  "suites": ["packages/wct-runner/testResources/jsTestSuite/test"],
+  "suites": ["testResources/jsTestSuite/test"],
   "plugins": {
     "local": {
       "browsers": ["chrome"],
@@ -12,5 +12,5 @@
     }
   },
   "npm": true,
-  "root": "../../../../.."
+  "root": "../../.."
 }
\ No newline at end of file
diff --git a/packages/webpack-transpiler/.vscode/launch.json b/packages/webpack-transpiler/.vscode/launch.json
index a949b9d86f..570048043d 100644
--- a/packages/webpack-transpiler/.vscode/launch.json
+++ b/packages/webpack-transpiler/.vscode/launch.json
@@ -10,8 +10,6 @@
       "name": "Unit tests",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",
@@ -30,8 +28,6 @@
       "name": "Integration tests",
       "program": "${workspaceFolder}/../../node_modules/mocha/bin/_mocha",
       "args": [
-        "-u",
-        "tdd",
         "--timeout",
         "999999",
         "--colors",