Use a named subject in `models/ee/board_spec.rb`

spec/models/ee/board_spec.rb

@@ -2,7 +2,7 @@ require 'spec_helper'
 
 describe Board do
   describe 'milestone' do
-    subject { build(:board) }
+    subject(:board) { build(:board) }
 
     context 'when the feature is available' do
       before do
@@ -10,31 +10,31 @@ describe Board do
       end
 
       it 'returns Milestone::Upcoming for upcoming milestone id' do
-        subject.milestone_id = Milestone::Upcoming.id
+        board.milestone_id = Milestone::Upcoming.id
 
-        expect(subject.milestone).to eq Milestone::Upcoming
+        expect(board.milestone).to eq Milestone::Upcoming
       end
 
       it 'returns milestone for valid milestone id' do
         milestone = create(:milestone)
-        subject.milestone_id = milestone.id
+        board.milestone_id = milestone.id
 
-        expect(subject.milestone).to eq milestone
+        expect(board.milestone).to eq milestone
       end
 
       it 'returns nil for invalid milestone id' do
-        subject.milestone_id = -1
+        board.milestone_id = -1
 
-        expect(subject.milestone).to be_nil
+        expect(board.milestone).to be_nil
       end
     end
 
     it 'returns nil when the feature is not available' do
       stub_licensed_features(issue_board_milestone: false)
       milestone = create(:milestone)
-      subject.milestone_id = milestone.id
+      board.milestone_id = milestone.id
 
-      expect(subject.milestone).to be_nil
+      expect(board.milestone).to be_nil
     end
   end
 end