diff --git a/frontend/tests/ts/areas.spec.ts b/frontend/tests/ts/areas.spec.ts
index 8dcd1bbc0..84f59a247 100644
--- a/frontend/tests/ts/areas.spec.ts
+++ b/frontend/tests/ts/areas.spec.ts
@@ -1,7 +1,8 @@
 // Import testing libs
-import chai, {expect} from 'chai';
+import { expect, use } from 'chai';
 import chaiDom from 'chai-dom';
-chai.use(chaiDom);
+
+const chai = use(chaiDom);
 
 // Import package under test
 import {Area, OutputArea, LabArea, makeLabArea, LabContainer}
diff --git a/frontend/tests/ts/dom-utils.spec.ts b/frontend/tests/ts/dom-utils.spec.ts
index af7f477c5..ead4604a5 100644
--- a/frontend/tests/ts/dom-utils.spec.ts
+++ b/frontend/tests/ts/dom-utils.spec.ts
@@ -1,8 +1,7 @@
 // Import testing libs
-import chai, {expect} from 'chai';
+import { expect, use } from 'chai';
 import chaiDom from 'chai-dom';
-
-chai.use(chaiDom);
+const chai = use(chaiDom);
 
 import {getElemById, getElemsByClass, getElemsByTag}
   from '../../src/ts/dom-utils.ts';
diff --git a/frontend/tests/ts/download.spec.ts b/frontend/tests/ts/download.spec.ts
index 3044353a0..88993ae6a 100644
--- a/frontend/tests/ts/download.spec.ts
+++ b/frontend/tests/ts/download.spec.ts
@@ -1,6 +1,8 @@
-import chai, {expect} from 'chai';
+import { expect, use } from 'chai';
+import chaiDom from 'chai-dom';
 import chaiAsPromised from 'chai-as-promised';
-chai.use(chaiAsPromised);
+
+const chai = use(chaiDom);
 
 import {
   getLanguages,
diff --git a/frontend/tests/ts/editor.spec.ts b/frontend/tests/ts/editor.spec.ts
index c6a95abde..1345e8996 100644
--- a/frontend/tests/ts/editor.spec.ts
+++ b/frontend/tests/ts/editor.spec.ts
@@ -1,8 +1,8 @@
 // Import testing libs
-import chai, {expect} from 'chai';
+import { expect, use } from 'chai';
 import chaiDom from 'chai-dom';
 
-chai.use(chaiDom);
+const chai = use(chaiDom);
 
 import ace from 'brace';
 
diff --git a/frontend/tests/ts/scrolltop.spec.ts b/frontend/tests/ts/scrolltop.spec.ts
index 13db18ce9..e533229b3 100644
--- a/frontend/tests/ts/scrolltop.spec.ts
+++ b/frontend/tests/ts/scrolltop.spec.ts
@@ -1,8 +1,8 @@
 // Import testing libs
-import chai, {expect} from 'chai';
+import { expect, use } from 'chai';
 import chaiDom from 'chai-dom';
 
-chai.use(chaiDom);
+const chai = use(chaiDom);
 
 import {scrollTop} from '../../src/ts/scrolltop.ts';
 
diff --git a/frontend/tests/ts/server.spec.ts b/frontend/tests/ts/server.spec.ts
index b20a2d382..cfe2bb44e 100644
--- a/frontend/tests/ts/server.spec.ts
+++ b/frontend/tests/ts/server.spec.ts
@@ -1,7 +1,8 @@
 // Import testing libs
-import chai, {expect} from 'chai';
-import chaiAsPromised from 'chai-as-promised';
-chai.use(chaiAsPromised);
+import { expect, use } from 'chai';
+import chaiDom from 'chai-dom';
+
+const chai = use(chaiDom);
 
 import {Server, WebSocket} from 'mock-socket';
 
diff --git a/frontend/tests/ts/widget.spec.ts b/frontend/tests/ts/widget.spec.ts
index 410284219..16472308e 100644
--- a/frontend/tests/ts/widget.spec.ts
+++ b/frontend/tests/ts/widget.spec.ts
@@ -1,10 +1,11 @@
 // Import testing libs
-import chai, {expect} from 'chai';
+import { expect, use } from 'chai';
 import chaiAsPromised from 'chai-as-promised';
 import chaiDom from 'chai-dom';
 import {Client, Server, WebSocket} from 'mock-socket';
-chai.use(chaiDom);
-chai.use(chaiAsPromised);
+
+// const chai = use(chaiDom);
+const chai = use(chaiAsPromised);
 
 import {readFileSync} from 'fs';
 import {resolve} from 'path';