diff --git a/jest/unit/components/__mocks__/token.ts b/jest/unit/components/__mocks__/token.ts
index 0f350c8..bdac6fa 100644
--- a/jest/unit/components/__mocks__/token.ts
+++ b/jest/unit/components/__mocks__/token.ts
@@ -15,6 +15,11 @@ export function generateTokenWithTimeRange(limit = 0) {
 
 export function generateTokenWithExpirationAsString() {
   const payload = { username: 'verdaccio', exp: 'I am not a number' };
+  return `xxxxxx.${Base64.encode(JSON.stringify(payload))}.xxxxxx`;
+}
+
+export function generateInvalidToken() {
+  const payload = `invalidtoken`;
   return `xxxxxx.${Base64.encode(payload)}.xxxxxx`;
 }
 
diff --git a/package.json b/package.json
index 882d4dd..d1e2632 100644
--- a/package.json
+++ b/package.json
@@ -19,8 +19,10 @@
     "@material-ui/icons": "4.4.3",
     "@octokit/rest": "16.28.7",
     "@testing-library/react": "9.2.0",
+    "@types/autosuggest-highlight": "3.1.0",
     "@types/enzyme": "3.10.3",
     "@types/jest": "24.0.18",
+    "@types/js-base64": "2.3.1",
     "@types/lodash": "4.14.141",
     "@types/node": "12.7.8",
     "@types/react": "16.9.2",
diff --git a/src/utils/login.test.ts b/src/utils/login.test.ts
index 00e278f..981d41c 100644
--- a/src/utils/login.test.ts
+++ b/src/utils/login.test.ts
@@ -1,6 +1,11 @@
 import { isTokenExpire, makeLogin } from './login';
 
-import { generateTokenWithTimeRange, generateTokenWithExpirationAsString, generateTokenWithOutExpiration } from '../../jest/unit/components/__mocks__/token';
+import {
+  generateTokenWithTimeRange,
+  generateTokenWithExpirationAsString,
+  generateTokenWithOutExpiration,
+  generateInvalidToken,
+} from '../../jest/unit/components/__mocks__/token';
 /* eslint-disable no-console */
 console.error = jest.fn();
 
@@ -9,10 +14,6 @@ jest.mock('./api', () => ({
 }));
 
 describe('isTokenExpire', (): void => {
-  test('isTokenExpire - token is not present', () => {
-    expect(isTokenExpire()).toBeTruthy();
-  });
-
   test('isTokenExpire - token is not a valid payload', (): void => {
     expect(isTokenExpire('not_a_valid_token')).toBeTruthy();
   });
@@ -33,11 +34,16 @@ describe('isTokenExpire', (): void => {
   });
 
   test('isTokenExpire - token is not a valid json token', (): void => {
-    const token = generateTokenWithExpirationAsString();
-    const result = ['Invalid token:', new SyntaxError('Unexpected token o in JSON at position 1'), 'xxxxxx.W29iamVjdCBPYmplY3Rd.xxxxxx'];
+    const token = generateInvalidToken();
+    const result = ['Invalid token:', new SyntaxError('Unexpected token i in JSON at position 0'), 'xxxxxx.aW52YWxpZHRva2Vu.xxxxxx'];
     expect(isTokenExpire(token)).toBeTruthy();
     expect(console.error).toHaveBeenCalledWith(...result);
   });
+
+  test('isTokenExpire - token expiration is not a number', (): void => {
+    const token = generateTokenWithExpirationAsString();
+    expect(isTokenExpire(token)).toBeTruthy();
+  });
 });
 
 describe('makeLogin', (): void => {
diff --git a/src/utils/login.ts b/src/utils/login.ts
index df4c0e7..a179e05 100644
--- a/src/utils/login.ts
+++ b/src/utils/login.ts
@@ -9,7 +9,7 @@ interface PayloadInterface {
   exp: number;
 }
 
-export function isTokenExpire(token?: string): boolean {
+export function isTokenExpire(token: string | null): boolean {
   if (!isString(token)) {
     return true;
   }
diff --git a/src/utils/storage.ts b/src/utils/storage.ts
index cd63fdd..3902703 100644
--- a/src/utils/storage.ts
+++ b/src/utils/storage.ts
@@ -1,6 +1,6 @@
 import memoryStorage from 'localstorage-memory';
 
-let storage;
+let storage: Storage;
 try {
   localStorage.setItem('__TEST__', '');
   localStorage.removeItem('__TEST__');
diff --git a/types/custom.d.ts b/types/custom.d.ts
index bf77f9b..437f023 100644
--- a/types/custom.d.ts
+++ b/types/custom.d.ts
@@ -5,3 +5,8 @@ declare module '*.svg' {
 }
 
 declare module '*.png';
+
+declare module 'localstorage-memory' {
+  const memoryStorage: Storage;
+  export default memoryStorage;
+}
diff --git a/yarn.lock b/yarn.lock
index 8a4e991..08fb550 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1498,6 +1498,11 @@
     "@testing-library/dom" "^6.3.0"
     "@types/testing-library__react" "^9.1.0"
 
+"@types/autosuggest-highlight@3.1.0":
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/@types/autosuggest-highlight/-/autosuggest-highlight-3.1.0.tgz#62045417c2f6d841f9f12e715336218e4db0fcb1"
+  integrity sha512-rJWvrDFKf2NkB3CkeJPcnX3oD0XAQriJOhYC5DUwiK6X/KTM96e1rW+1/PgI0U4tL6GQ2K7dvoiYFhMnAaNLUw==
+
 "@types/babel__core@^7.1.0":
   version "7.1.3"
   resolved "https://registry.verdaccio.org/@types%2fbabel__core/-/babel__core-7.1.3.tgz#e441ea7df63cd080dfcd02ab199e6d16a735fc30"
@@ -1607,6 +1612,11 @@
   resolved "https://registry.verdaccio.org/@types%2fjest/-/jest-23.3.14.tgz#37daaf78069e7948520474c87b80092ea912520a"
   integrity sha512-Q5hTcfdudEL2yOmluA1zaSyPbzWPmJ3XfSWeP3RyoYvS9hnje1ZyagrZOuQ6+1nQC1Gw+7gap3pLNL3xL6UBug==
 
+"@types/js-base64@2.3.1":
+  version "2.3.1"
+  resolved "https://registry.yarnpkg.com/@types/js-base64/-/js-base64-2.3.1.tgz#c39f14f129408a3d96a1105a650d8b2b6eeb4168"
+  integrity sha512-4RKbhIDGC87s4EBy2Cp2/5S2O6kmCRcZnD5KRCq1q9z2GhBte1+BdsfVKCpG8yKpDGNyEE2G6IqFIh6W2YwWPA==
+
 "@types/json-schema@^7.0.3":
   version "7.0.3"
   resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.3.tgz#bdfd69d61e464dcc81b25159c270d75a73c1a636"