diff --git a/lib/rubocop/ast/node/if_node.rb b/lib/rubocop/ast/node/if_node.rb
index 9c89b1125..5eaea2e8d 100644
--- a/lib/rubocop/ast/node/if_node.rb
+++ b/lib/rubocop/ast/node/if_node.rb
@@ -147,7 +147,7 @@ def node_parts
       def branches
         branches = [if_branch]
 
-        return branches unless else_branch
+        return branches unless else?
 
         other_branches = if elsif_conditional?
                            else_branch.branches
diff --git a/spec/rubocop/ast/case_node_spec.rb b/spec/rubocop/ast/case_node_spec.rb
index 34a37390f..238d49ec1 100644
--- a/spec/rubocop/ast/case_node_spec.rb
+++ b/spec/rubocop/ast/case_node_spec.rb
@@ -147,5 +147,27 @@
         expect(case_node.branches).to match [nil, be_int_type]
       end
     end
+
+    context 'when compared to an IfNode' do
+      let(:source) { <<~RUBY }
+        case
+        when foo then 1
+        when bar then 2
+        else
+        end
+
+        if foo then 1
+        elsif bar then 2
+        else
+        end
+      RUBY
+
+      let(:case_node) { ast.children.first }
+      let(:if_node) { ast.children.last }
+
+      it 'returns the same' do
+        expect(case_node.branches).to eq if_node.branches
+      end
+    end
   end
 end