Use "not set" instead of "unselected" to see if that helps tests.

lang/en/attendance.php

@@ -471,7 +471,7 @@ $string['statuses'] = 'Statuses';
 $string['statusset'] = 'Status set {$a}';
 $string['statussetsettings'] = 'Status set';
 $string['statusall'] = 'all';
-$string['statusunselected'] = 'unselected';
+$string['statusunselected'] = 'not set';
 $string['strftimedm'] = '%b %d';
 $string['strftimedmy'] = '%d %b %Y';
 $string['strftimedmyhm'] = '%d %b %Y %I.%M%p'; // Line added to allow multiple sessions in the same day.

tests/behat/extra_features.feature

@@ -24,8 +24,6 @@ Feature: Test the various new features in the attendance module
     And I am on "Course 1" course homepage with editing mode on
     And I add a "Attendance" to section "1" and I fill the form with:
       | Name | Test attendance |
-    And I add a "Attendance" to section "1" and I fill the form with:
-      | Name | Test2 attendance |
     And I log out
 
   Scenario: A teacher can create and update temporary users
@@ -215,13 +213,13 @@ Feature: Test the various new features in the attendance module
   Scenario: A teacher can use the radio buttons to set attendance values for unselected users
     Given I log in as "teacher1"
     And I am on "Course 1" course homepage
-    And I follow "Test2 attendance"
+    And I follow "Test attendance"
     And I follow "Add"
     And I set the following fields to these values:
       | id_addmultiply | 0 |
     And I click on "submitbutton" "button"
     And I click on "Take attendance" "link"
-    And I set the field "Set status for" to "unselected"
+    And I set the field "Set status for" to "not set"
     # Set student 1 as present.
     And I click on "td.cell.c3 input" "css_element" in the "Student 1" "table_row"
     And I click on "setallstatuses" "field" in the ".takelist tbody td.c3" "css_element"