diff --git a/frontend/tests/unit/common/api_test.js b/frontend/tests/unit/common/api_test.js
index f9656e8ec..dc9126996 100644
--- a/frontend/tests/unit/common/api_test.js
+++ b/frontend/tests/unit/common/api_test.js
@@ -1,41 +1,45 @@
-import assert from 'assert';
-import Api from 'common/api';
-import MockAdapter from 'axios-mock-adapter';
+import Api from "common/api";
+import MockAdapter from "axios-mock-adapter";
 
-const mock = new MockAdapter(Api);
+let chai = require("../../../node_modules/chai/chai");
+let assert = chai.assert;
 
-const getCollectionResponse = [
-    {id: 1, name: 'John Smith'},
-    {id: 1, name: 'John Smith'}
-];
+describe("common/api", () => {
 
-const getEntityResponse = {
-    id: 1, name: 'John Smith'
-};
+    const mock = new MockAdapter(Api);
 
-const postEntityResponse = {
-    users: [
-        {id: 1, name: 'John Smith'}
-    ]
-};
+    const getCollectionResponse = [
+        {id: 1, name: "John Smith"},
+        {id: 1, name: "John Smith"}
+    ];
 
-const putEntityResponse = {
-    users: [
-        {id: 2, name: 'John Foo'}
-    ]
-};
+    const getEntityResponse = {
+        id: 1, name: "John Smith"
+    };
 
-const deleteEntityResponse = null;
+    const postEntityResponse = {
+        users: [
+            {id: 1, name: "John Smith"}
+        ]
+    };
 
-mock.onGet('foo').reply(200, getCollectionResponse);
-mock.onGet('foo/123').reply(200, getEntityResponse);
-mock.onPost('foo').reply(201, postEntityResponse);
-mock.onPut('foo/2').reply(200, putEntityResponse);
-mock.onDelete('foo/2').reply(204, deleteEntityResponse);
+    const putEntityResponse = {
+        users: [
+            {id: 2, name: "John Foo"}
+        ]
+    };
 
-describe('common/api', () => {
-    it('get("foo") should return a list of results and return with HTTP code 200', (done) => {
-        Api.get('foo').then(
+    const deleteEntityResponse = null;
+
+    mock.onGet("foo").reply(200, getCollectionResponse);
+    mock.onGet("foo/123").reply(200, getEntityResponse);
+    mock.onPost("foo").reply(201, postEntityResponse);
+    mock.onPut("foo/2").reply(200, putEntityResponse);
+    mock.onDelete("foo/2").reply(204, deleteEntityResponse);
+    mock.onGet("error").reply(401, "custom error cat");
+
+    it("get should return a list of results and return with HTTP code 200", (done) => {
+        Api.get("foo").then(
             (response) => {
                 assert.equal(200, response.status);
                 assert.deepEqual(getCollectionResponse, response.data);
@@ -48,8 +52,8 @@ describe('common/api', () => {
         );
     });
 
-    it('get("foo/123") should return one item and return with HTTP code 200', (done) => {
-        Api.get('foo/123').then(
+    it("get should return one item and return with HTTP code 200", (done) => {
+        Api.get("foo/123").then(
             (response) => {
                 assert.equal(200, response.status);
                 assert.deepEqual(getEntityResponse, response.data);
@@ -62,8 +66,8 @@ describe('common/api', () => {
         );
     });
 
-    it('post("foo") should create one item and return with HTTP code 201', (done) => {
-        Api.post('foo', postEntityResponse).then(
+    it("post should create one item and return with HTTP code 201", (done) => {
+        Api.post("foo", postEntityResponse).then(
             (response) => {
                 assert.equal(201, response.status);
                 assert.deepEqual(postEntityResponse, response.data);
@@ -76,8 +80,8 @@ describe('common/api', () => {
         );
     });
 
-    it('put("foo/2") should update one item and return with HTTP code 200', (done) => {
-        Api.put('foo/2', putEntityResponse).then(
+    it("put should update one item and return with HTTP code 200", (done) => {
+        Api.put("foo/2", putEntityResponse).then(
             (response) => {
                 assert.equal(200, response.status);
                 assert.deepEqual(putEntityResponse, response.data);
@@ -90,8 +94,8 @@ describe('common/api', () => {
         );
     });
 
-    it('delete("foo/2") should delete one item and return with HTTP code 204', (done) => {
-        Api.delete('foo/2', deleteEntityResponse).then(
+    it("delete should delete one item and return with HTTP code 204", (done) => {
+        Api.delete("foo/2", deleteEntityResponse).then(
             (response) => {
                 assert.equal(204, response.status);
                 assert.deepEqual(deleteEntityResponse, response.data);
@@ -103,4 +107,10 @@ describe('common/api', () => {
             }
         );
     });
+
+    it("get error", function() {
+        return Api.get("error")
+            .then(function(m) { throw new Error("was not supposed to succeed"); })
+            .catch(function(m) { assert.equal(m.message, "Request failed with status code 401")});
+    });
 });