diff --git a/mod/forum/tests/behat/app_basic_usage.feature b/mod/forum/tests/behat/app_basic_usage.feature
new file mode 100644
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+@mod @mod_forum @app @javascript
+Feature: Test basic usage in app
+  In order to participate in the forum while using the mobile app
+  As a student
+  I need basic forum functionality to work
+
+  Background:
+    Given the following "courses" exist:
+      | fullname | shortname |
+      | Course 1 | C1        |
+    And the following "users" exist:
+      | username |
+      | student1 |
+    And the following "course enrolments" exist:
+      | user     | course | role    |
+      | student1 | C1     | student |
+    And the following "activities" exist:
+      | activity   | name            | intro       | course | idnumber | groupmode |
+      | forum      | Test forum name | Test forum  | C1     | forum    | 0         |
+
+  Scenario: Student starts a discussion
+    When I enter the app
+    And I log in as "student1"
+    And I press "Course 1" near "Course overview" in the app
+    And I press "Test forum name" in the app
+    And I press "Add a new discussion topic" in the app
+    And I set the field "Subject" to "My happy subject" in the app
+    And I set the field "Message" to "An awesome message" in the app
+    And I press "Post to forum" in the app
+    Then I should see "My happy subject"
+    And I should see "An awesome message"
+
+  @app_upto3.6.1
+  Scenario: Student posts a reply
+    When I enter the app
+    And I log in as "student1"
+    And I press "Course 1" near "Course overview" in the app
+    And I press "Test forum name" in the app
+    And I press "Add a new discussion topic" in the app
+    And I set the field "Subject" to "DiscussionSubject" in the app
+    And I set the field "Message" to "DiscussionMessage" in the app
+    And I press "Post to forum" in the app
+    And I press "DiscussionSubject" in the app
+    And I press "Reply" in the app
+    And I set the field "Message" to "ReplyMessage" in the app
+    And I press "Post to forum" in the app
+    Then I should see "DiscussionMessage"
+    And I should see "ReplyMessage"
+
+  @app_from3.7
+  Scenario: Student posts a reply
+    When I enter the app
+    And I log in as "student1"
+    And I press "Course 1" near "Course overview" in the app
+    And I press "Test forum name" in the app
+    And I press "Add a new discussion topic" in the app
+    And I set the field "Subject" to "DiscussionSubject" in the app
+    And I set the field "Message" to "DiscussionMessage" in the app
+    And I press "Post to forum" in the app
+    And I press "DiscussionSubject" in the app
+    And I press "Reply" in the app
+    And I set the field "Write your reply" to "ReplyMessage" in the app
+    And I press "Post to forum" in the app
+    Then I should see "DiscussionMessage"
+    And I should see "ReplyMessage"
+
+  Scenario: Test that 'open in browser' works for forum
+    When I enter the app
+    And I change viewport size to "360x640"
+    And I log in as "student1"
+    And I press "Course 1" near "Course overview" in the app
+    And I press "Test forum name" in the app
+    And I press the page menu button in the app
+    And I press "Open in browser" in the app
+    And I switch to the browser tab opened by the app
+    And I log in as "student1"
+    Then I should see "Test forum name"
+    And I should see "Add a new discussion topic"
+    And I close the browser tab opened by the app
+    And I press the back button in the app