diff --git a/cypress/integration/common/steps.js b/cypress/integration/common/steps.js
index 1a9891a7a..d05f80f13 100644
--- a/cypress/integration/common/steps.js
+++ b/cypress/integration/common/steps.js
@@ -86,6 +86,10 @@ Given('my user account has the role {string}', role => {
 
 When('I log out', cy.logout)
 
+When('I visit {string}', page => {
+  cy.openPage(page)
+})
+
 When('I visit the {string} page', page => {
   cy.openPage(page)
 })
diff --git a/cypress/integration/identifier/PersistentLinks.feature b/cypress/integration/identifier/PersistentLinks.feature
new file mode 100644
index 000000000..b4a55cee3
--- /dev/null
+++ b/cypress/integration/identifier/PersistentLinks.feature
@@ -0,0 +1,41 @@
+Feature: Persistent Links
+  As a user
+  I want to click on a link with an 'href' having an unmodifiable id of a user
+  In order to have persistent links even if the user changes a his/her slug
+
+  |      | Modifiable | Referenceable | Unique | Purpose                       |
+  | --   | --         | --            | --     | --                            |
+  | ID   | no         | yes           | yes    | Identity, Traceability, Links |
+  | Slug | yes        | yes           | yes    | @-Mentions, SEO-friendly URL  |
+  | Name | yes        | no            | no     | Search, self-description      |
+
+
+  Background:
+    Given we have the following user accounts:
+      | id         | name           | slug    |
+      | MHNqce98y1 | Stepen Hawking | thehawk |
+    And we have the following posts in our database:
+      | id         | title                                         | slug       |
+      | bWBjpkTKZp | 101 Essays that will change the way you think | 101-essays |
+    And I have a user account
+    And I am logged in
+
+  Scenario Outline: Link with slug only is valid and gets auto-completed
+    When I visit "<url>"
+    Then I get redirected to "<redirectUrl>"
+    Examples:
+      | url              | redirectUrl                 |
+      | /profile/thehawk | /profile/MHNqce98y1/thehawk |
+      | /post/101-essays | /post/bWBjpkTKZp/101-essays |
+
+  Scenario: Link with id only will always point to the same user
+    When I visit "/profile/MHNqce98y1"
+    Then I get redirected to "/profile/MHNqce98y1/thehawk"
+
+  Scenario Outline: ID takes precedence over slug
+    When I visit "<url>"
+    Then I get redirected to "<redirectUrl>"
+    Examples:
+      | url                                 | redirectUrl                 |
+      | /profile/MHNqce98y1/stephen-hawking | /profile/MHNqce98y1/thehawk |
+      | /post/bWBjpkTKZp/the-way-you-think  | /post/bWBjpkTKZp/101-essays |