diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 82f006b8b..3bbd42e6e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,11 +11,11 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     strategy:
       matrix:
-        node-version: [16.x]
+        node-version: [20.x]
 
     steps:
     - uses: actions/checkout@v3
@@ -23,7 +23,7 @@ jobs:
       uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node-version }}
-    - run: npm install --legacy-peer-deps
+    - run: npm i --force
       env:
         PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: true
         PUPPETEER_SKIP_CHROMIUM_DOWNLOAD: true
diff --git a/package.json b/package.json
index 772390a3d..fd4740e26 100644
--- a/package.json
+++ b/package.json
@@ -136,7 +136,7 @@
     "sinon": "15.2.0",
     "sinon-chai": "3.7.0",
     "testcafe": "3.0.1",
-    "ts-morph": "3.1.3",
+    "ts-morph": "19.0.0",
     "ts-node": "10.9.1",
     "tsd-jsdoc": "2.5.0",
     "typedoc": "0.24.8",
diff --git a/test/runner/definitions_test.js b/test/runner/definitions_test.js
index 170f2b499..6da8c19c7 100644
--- a/test/runner/definitions_test.js
+++ b/test/runner/definitions_test.js
@@ -18,7 +18,7 @@ const pathToTypings = path.resolve(pathToRootOfProject, 'typings');
 chai.use(chaiSubset);
 
 describe('Definitions', function () {
-  this.timeout(20000);
+  this.timeout(30000);
   this.retries(4);
   before(() => {
     execSync('npm run def', { cwd: pathToRootOfProject });
@@ -39,7 +39,7 @@ describe('Definitions', function () {
         types.should.be.valid;
 
         const definitionsFile = types.getSourceFileOrThrow(pathOfJSDocDefinitions);
-        const index = definitionsFile.getNamespaceOrThrow('CodeceptJS').getNamespaceOrThrow('index').getStructure();
+        const index = definitionsFile.getModule('CodeceptJS').getModule('index').getStructure();
         index.statements.should.containSubset([
           { declarations: [{ name: 'recorder', type: 'CodeceptJS.recorder' }] },
           { declarations: [{ name: 'event', type: 'typeof CodeceptJS.event' }] },
@@ -61,7 +61,7 @@ describe('Definitions', function () {
       types.should.be.valid;
 
       const definitionFile = types.getSourceFileOrThrow(`${codecept_dir}/steps.d.ts`);
-      const extend = getExtends(definitionFile.getNamespaceOrThrow('CodeceptJS').getInterfaceOrThrow('I'));
+      const extend = getExtends(definitionFile.getModule('CodeceptJS').getInterfaceOrThrow('I'));
       extend.should.containSubset([{
         methods: [{
           name: 'amInPath',
@@ -115,7 +115,7 @@ describe('Definitions', function () {
         returnType: undefined,
         kind: StructureKind.Method,
       }]);
-      const I = getExtends(definitionsFile.getNamespaceOrThrow('CodeceptJS').getInterfaceOrThrow('I'));
+      const I = getExtends(definitionsFile.getModule('CodeceptJS').getInterfaceOrThrow('I'));
       I.should.containSubset([{
         methods: [{
           name: 'openDir',
@@ -184,7 +184,7 @@ describe('Definitions', function () {
       types.should.be.valid;
 
       const definitionsFile = types.getSourceFileOrThrow(`${codecept_dir}/steps.d.ts`);
-      const CallbackOrder = definitionsFile.getNamespaceOrThrow('CodeceptJS').getInterfaceOrThrow('SupportObject').getStructure();
+      const CallbackOrder = definitionsFile.getModule('CodeceptJS').getInterfaceOrThrow('SupportObject').getStructure();
       CallbackOrder.properties.should.containSubset([
         { name: 'I', type: 'I' },
         { name: 'MyPage', type: 'MyPage' },
@@ -201,7 +201,7 @@ describe('Definitions', function () {
       types.should.be.valid;
 
       const definitionFile = types.getSourceFileOrThrow(`${codecept_dir}/steps.d.ts`);
-      const extend = getExtends(definitionFile.getNamespaceOrThrow('CodeceptJS').getInterfaceOrThrow('I'));
+      const extend = getExtends(definitionFile.getModule('CodeceptJS').getInterfaceOrThrow('I'));
       extend.should.containSubset([{
         methods: [{
           name: 'amInPath',
@@ -282,7 +282,7 @@ function typesFrom(sourceFile) {
     tsConfigFilePath: path.join(pathToRootOfProject, 'tsconfig.json'),
     resolutionHost,
   });
-  project.addExistingSourceFile(sourceFile);
+  project.addSourceFileAtPath(sourceFile);
   project.resolveSourceFileDependencies();
   return project;
 }