diff --git a/admin/settings/grades.php b/admin/settings/grades.php
index d47936130a8..84a5296dfde 100644
--- a/admin/settings/grades.php
+++ b/admin/settings/grades.php
@@ -98,7 +98,7 @@ if (has_capability('moodle/grade:manage', $systemcontext)
 
         $defaultvisible = array(GRADE_AGGREGATE_SUM);
 
-        $defaults = array('value'=>GRADE_AGGREGATE_WEIGHTED_MEAN2, 'forced'=>false, 'adv'=>false);
+        $defaults = array('value' => GRADE_AGGREGATE_SUM, 'forced' => false, 'adv' => false);
         $temp->add(new admin_setting_gradecat_combo('grade_aggregation', new lang_string('aggregation', 'grades'), new lang_string('aggregation_help', 'grades'), $defaults, $options));
 
         $temp->add(new admin_setting_configmultiselect('grade_aggregations_visible', new lang_string('aggregationsvisible', 'grades'),
diff --git a/grade/tests/behat/grade_calculated_weights.feature b/grade/tests/behat/grade_calculated_weights.feature
index 6392a7188ed..ccab3c0e780 100644
--- a/grade/tests/behat/grade_calculated_weights.feature
+++ b/grade/tests/behat/grade_calculated_weights.feature
@@ -101,6 +101,8 @@ Feature: We can understand the gradebook user report
   Scenario: Simple weighted mean of grades aggregation
     And I set the following settings for grade item "Course 1":
       | Aggregation | Simple weighted mean of grades |
+    And I set the following settings for grade item "Sub category":
+      | Aggregation | Simple weighted mean of grades |
     And I set the following settings for grade item "Test assignment three":
       | Extra credit | 1 |
     And I set the field "Grade report" to "User report"
@@ -204,9 +206,11 @@ Feature: We can understand the gradebook user report
       | Test assignment six | 33.33 % | 30.00 | 0.00 |
 
   @javascript
-  Scenario: Natural aggregation
+  Scenario: View user report with mixed aggregation methods
     And I set the following settings for grade item "Course 1":
       | Aggregation | Natural |
+    And I set the following settings for grade item "Sub category":
+      | Aggregation | Weighted mean of grades |
     And I set the following settings for grade item "Test assignment three":
       | Extra credit | 1 |
     And I set the field "Grade report" to "User report"
@@ -221,3 +225,24 @@ Feature: We can understand the gradebook user report
       | Test assignment four | 33.33 % | 10.00 | 3.33 |
       | Test assignment five | 33.33 % | 70.00 | 23.33 |
       | Test assignment six | 33.33 % | 30.00 | 10.00 |
+      | Category totalWeighted mean of grades. | 33.33 % | 36.67 | - |
+      | Course totalNatural. | - | 156.67 | - |
+
+  @javascript
+  Scenario: View user report with natural aggregation
+    And I set the following settings for grade item "Test assignment three":
+      | Extra credit | 1 |
+    And I set the field "Grade report" to "User report"
+    And I set the field "Select all or one user" to "Student 1"
+
+    # Check the values in the weights column.
+    Then the following should exist in the "user-grade" table:
+      | Grade item | Calculated weight | Grade | Contribution to course total |
+      | Test assignment one | 20.00 % | 60.00 | 60.00 |
+      | Test assignment two | 20.00 % | 20.00 | 20.00 |
+      | Test assignment three | 20.00 %( Extra credit ) | 40.00 | 40.00 |
+      | Test assignment four | 33.33 % | 10.00 | 10.00 |
+      | Test assignment five | 33.33 % | 70.00 | 70.00 |
+      | Test assignment six | 33.33 % | 30.00 | 30.00 |
+      | Category totalNatural. | 60.00 % | 110.00 | - |
+      | Course totalNatural. | - | 230.00 | - |
diff --git a/grade/tests/behat/grade_view.feature b/grade/tests/behat/grade_view.feature
index 7b52c977a52..cece51a1aac 100644
--- a/grade/tests/behat/grade_view.feature
+++ b/grade/tests/behat/grade_view.feature
@@ -72,12 +72,12 @@ Feature: We can enter in grades and view reports from the gradebook
       | Grade item | Grade | Range | Percentage |
       | Test assignment name 1 | 80.00 | 0–100 | 80.00 % |
       | Test assignment name 2 | 90.00 | 0–100 | 90.00 % |
-      | Course totalSimple weighted mean of grades. | 85.00 | 0–100 | 85.00 % |
+      | Course totalNatural. | 170.00 | 0–200 | 85.00 % |
     And the following should not exist in the "user-grade" table:
       | Grade item | Grade | Range | Percentage |
-      | Course total | 90.00 | 0–110 | 90.00 % |
+      | Course totalNatural. | 90.00 | 0–100 | 90.00 % |
     And I set the field "Grade report" to "Overview report"
-    And "C1" row "Grade" column of "overview-grade" table should contain "85.00"
+    And "C1" row "Grade" column of "overview-grade" table should contain "170.00"
     And "C1" row "Grade" column of "overview-grade" table should not contain "90.00"
 
   @javascript