diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index c8cc34299..f540a80cf 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -117,12 +117,6 @@ Layout/EmptyLinesAroundModuleBody:
 Layout/ExtraSpacing:
   Enabled: false
 
-# Cop supports --auto-correct.
-# Configuration parameters: IndentationWidth.
-Layout/IndentAssignment:
-  Exclude:
-    - 'test/unit/lib/redmine/helpers/gantt_test.rb'
-
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, IndentationWidth.
 # SupportedStyles: consistent, consistent_relative_to_receiver, special_for_inner_method_call, special_for_inner_method_call_in_parentheses
diff --git a/test/unit/lib/redmine/helpers/gantt_test.rb b/test/unit/lib/redmine/helpers/gantt_test.rb
index 1720ff6aa..302b19920 100644
--- a/test/unit/lib/redmine/helpers/gantt_test.rb
+++ b/test/unit/lib/redmine/helpers/gantt_test.rb
@@ -505,17 +505,17 @@ class Redmine::Helpers::GanttHelperTest < Redmine::HelperTest
     issue2 = Issue.generate!(:subject => "test", :project => project,
                              :start_date => (today - 2))
     issue1_child1 =
-             Issue.generate!(:parent_issue_id => issue1.id, :subject => 'child',
-                             :project => project)
+      Issue.generate!(:parent_issue_id => issue1.id, :subject => 'child',
+                      :project => project)
     issue1_child2 =
-             Issue.generate!(:parent_issue_id => issue1.id, :subject => 'child',
-                             :project => project, :start_date => (today - 10))
+      Issue.generate!(:parent_issue_id => issue1.id, :subject => 'child',
+                      :project => project, :start_date => (today - 10))
     issue1_child1_child1 =
-             Issue.generate!(:parent_issue_id => issue1_child1.id, :subject => 'child',
-                             :project => project, :start_date => (today - 8))
+      Issue.generate!(:parent_issue_id => issue1_child1.id, :subject => 'child',
+                      :project => project, :start_date => (today - 8))
     issue1_child1_child2 =
-             Issue.generate!(:parent_issue_id => issue1_child1.id, :subject => 'child',
-                             :project => project, :start_date => (today - 9))
+      Issue.generate!(:parent_issue_id => issue1_child1.id, :subject => 'child',
+                      :project => project, :start_date => (today - 9))
     issue1_child1_child1_logic = Redmine::Helpers::Gantt.sort_issue_logic(issue1_child1_child1)
     assert_equal [[today - 10, issue1.id], [today - 9, issue1_child1.id],
                   [today - 8, issue1_child1_child1.id]],