diff --git a/test/specs/asset_manager/model/Asset.js b/test/specs/asset_manager/model/Asset.js
deleted file mode 100644
index 95532b497..000000000
--- a/test/specs/asset_manager/model/Asset.js
+++ /dev/null
@@ -1,29 +0,0 @@
-import Asset from 'asset_manager/model/Asset';
-
-describe('Asset', () => {
-  test('Object exists', () => {
-    expect(Asset).toBeTruthy();
-  });
-
-  test('Has default values', () => {
-    var obj = new Asset({});
-    expect(obj.get('type')).toBeFalsy();
-    expect(obj.get('src')).toBeFalsy();
-    expect(obj.getExtension()).toBeFalsy();
-    expect(obj.getFilename()).toBeFalsy();
-  });
-
-  test('Test getFilename', () => {
-    var obj = new Asset({ type: 'image', src: 'ch/eck/t.e.s.t' });
-    expect(obj.getFilename()).toEqual('t.e.s.t');
-    var obj = new Asset({ type: 'image', src: 'ch/eck/1234abc' });
-    expect(obj.getFilename()).toEqual('1234abc');
-  });
-
-  test('Test getExtension', () => {
-    var obj = new Asset({ type: 'image', src: 'ch/eck/t.e.s.t' });
-    expect(obj.getExtension()).toEqual('t');
-    var obj = new Asset({ type: 'image', src: 'ch/eck/1234abc.' });
-    expect(obj.getExtension()).toEqual('');
-  });
-});
diff --git a/test/specs/asset_manager/model/Asset.ts b/test/specs/asset_manager/model/Asset.ts
new file mode 100644
index 000000000..1235cff47
--- /dev/null
+++ b/test/specs/asset_manager/model/Asset.ts
@@ -0,0 +1,29 @@
+import Asset from '../../../../src/asset_manager/model/Asset';
+
+describe('Asset', () => {
+  test('Object exists', () => {
+    expect(Asset).toBeTruthy();
+  });
+
+  test('Has default values', () => {
+    const asset = new Asset({});
+    expect(asset.get('type')).toBeFalsy();
+    expect(asset.get('src')).toBeFalsy();
+    expect(asset.getExtension()).toBeFalsy();
+    expect(asset.getFilename()).toBeFalsy();
+  });
+
+  test('Test getFilename', () => {
+    const asset = new Asset({ type: 'image', src: 'ch/eck/t.e.s.t' });
+    expect(asset.getFilename()).toEqual('t.e.s.t');
+    const asset2 = new Asset({ type: 'image', src: 'ch/eck/1234abc' });
+    expect(asset2.getFilename()).toEqual('1234abc');
+  });
+
+  test('Test getExtension', () => {
+    const asset = new Asset({ type: 'image', src: 'ch/eck/t.e.s.t' });
+    expect(asset.getExtension()).toEqual('t');
+    const asset2 = new Asset({ type: 'image', src: 'ch/eck/1234abc.' });
+    expect(asset2.getExtension()).toEqual('');
+  });
+});
diff --git a/test/specs/asset_manager/model/AssetImage.js b/test/specs/asset_manager/model/AssetImage.ts
similarity index 80%
rename from test/specs/asset_manager/model/AssetImage.js
rename to test/specs/asset_manager/model/AssetImage.ts
index 6635e3f44..e2735758e 100644
--- a/test/specs/asset_manager/model/AssetImage.js
+++ b/test/specs/asset_manager/model/AssetImage.ts
@@ -1,4 +1,4 @@
-import AssetImage from 'asset_manager/model/AssetImage';
+import AssetImage from '../../../../src/asset_manager/model/AssetImage';
 
 describe('AssetImage', () => {
   test('Object exists', () => {
@@ -6,7 +6,7 @@ describe('AssetImage', () => {
   });
 
   test('Has default values', () => {
-    var obj = new AssetImage({});
+    const obj = new AssetImage({});
     expect(obj.get('type')).toEqual('image');
     expect(obj.get('src')).toBeFalsy();
     expect(obj.get('unitDim')).toEqual('px');
diff --git a/test/specs/asset_manager/model/Assets.js b/test/specs/asset_manager/model/Assets.ts
similarity index 69%
rename from test/specs/asset_manager/model/Assets.js
rename to test/specs/asset_manager/model/Assets.ts
index 24958d66b..2fbaa0325 100644
--- a/test/specs/asset_manager/model/Assets.js
+++ b/test/specs/asset_manager/model/Assets.ts
@@ -1,16 +1,12 @@
-import Assets from 'asset_manager/model/Assets';
+import Assets from '../../../../src/asset_manager/model/Assets';
 
 describe('Assets', () => {
-  var obj;
+  let obj: Assets;
 
   beforeEach(() => {
     obj = new Assets();
   });
 
-  afterEach(() => {
-    obj = null;
-  });
-
   test('Object exists', () => {
     expect(obj).toBeTruthy();
   });