diff --git a/README.md b/README.md
index 603ea8178..45006581c 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,11 @@ At the same time, it should be possible in the future to link these networks wit
 
 In other words, we are interested in a network of networks and in keeping the data as close as possible to the user and the operator they trusts.
 
+## Introduction
+
+Have a look into our short video:
+[ocelot.social - GitHub - Developer Welcome - Tutorial (english)](https://www.youtube.com/watch?v=gZSL6KvBIiY&list=PLFMD5liPP01kbuReHxYXxv_1fI5rIgS1f&index=1)
+
 ## Directory Layout
 
 There are three important directories:
@@ -192,6 +197,14 @@ The only deployment method in this repository for development purposes as descri
 * [NodeJS](https://nodejs.org/en/)
 * [Neo4J](https://neo4j.com/)
 
+### For Testing
+
+* [Cypress](https://docs.cypress.io/)
+* [Storybook](https://storybook.js.org/)
+* [Jest](https://jestjs.io/)
+* [Vue Test Utils](https://vue-test-utils.vuejs.org/)
+* [ESLint](https://eslint.org/)
+
 ## Attributions
 
 Locale Icons made by [Freepik](http://www.freepik.com/) from [www.flaticon.com](https://www.flaticon.com/) is licensed by [CC 3.0 BY](http://creativecommons.org/licenses/by/3.0/).
diff --git a/backend/src/jwt/decode.spec.js b/backend/src/jwt/decode.spec.js
index 78ceadecb..bb247f028 100644
--- a/backend/src/jwt/decode.spec.js
+++ b/backend/src/jwt/decode.spec.js
@@ -21,8 +21,14 @@ const neode = getNeode()
 //   iss: 'http://localhost:4000',
 //   sub: 'u3'
 // }
+// !!! if the token expires go into the GraphQL Playground in the browser at 'http://localhost:4000' with a running backend and a seeded Neo4j database
+//     now do the login mutation:
+//       mutation {
+//         login(email:"user@example.org", password:"1234")
+//       }
+//     replace this token here with the one you received as the result
 export const validAuthorizationHeader =
-  'Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJyb2xlIjoidXNlciIsImxvY2F0aW9uTmFtZSI6bnVsbCwibmFtZSI6Ikplbm55IFJvc3RvY2siLCJhYm91dCI6bnVsbCwiYXZhdGFyIjoiaHR0cHM6Ly9zMy5hbWF6b25hd3MuY29tL3VpZmFjZXMvZmFjZXMvdHdpdHRlci9zYXNoYV9zaGVzdGFrb3YvMTI4LmpwZyIsImlkIjoidTMiLCJlbWFpbCI6InVzZXJAZXhhbXBsZS5vcmciLCJzbHVnIjoiamVubnktcm9zdG9jayIsImlhdCI6MTU1MDg0NjY4MCwiZXhwIjoxNjM3MjQ2NjgwLCJhdWQiOiJodHRwOi8vbG9jYWxob3N0OjMwMDAiLCJpc3MiOiJodHRwOi8vbG9jYWxob3N0OjQwMDAiLCJzdWIiOiJ1MyJ9.eZ_mVKas4Wzoc_JrQTEWXyRn7eY64cdIg4vqQ-F_7Jc'
+  'Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6InUzIiwibmFtZSI6Ikplbm55IFJvc3RvY2siLCJzbHVnIjoiamVubnktcm9zdG9jayIsImlhdCI6MTYzNzY0NDMwMCwiZXhwIjoxNzAwNzU5NTAwLCJhdWQiOiJodHRwOi8vbG9jYWxob3N0OjMwMDAiLCJpc3MiOiJodHRwOi8vbG9jYWxob3N0OjQwMDAiLCJzdWIiOiJ1MyJ9.ispIfRfgkXuYoIhKx7x2jPxgvHDJVv1ogMycLmfUnsk'
 
 beforeAll(async () => {
   await cleanDatabase()
@@ -47,6 +53,7 @@ describe('decode', () => {
     beforeEach(() => {
       authorizationHeader = null
     })
+
     it('returns null', returnsNull)
   })
 
@@ -54,6 +61,7 @@ describe('decode', () => {
     beforeEach(() => {
       authorizationHeader = undefined
     })
+
     it('returns null', returnsNull)
   })
 
@@ -61,6 +69,7 @@ describe('decode', () => {
     beforeEach(() => {
       authorizationHeader = 'blah'
     })
+
     it('returns null', returnsNull)
   })
 
@@ -68,6 +77,7 @@ describe('decode', () => {
     beforeEach(() => {
       authorizationHeader = validAuthorizationHeader
     })
+
     it('returns null', returnsNull)
 
     describe('and corresponding user in the database', () => {