diff --git a/spec/rubocop/cop/style/conditional_assignment_assign_to_condition_spec.rb b/spec/rubocop/cop/style/conditional_assignment_assign_to_condition_spec.rb
index d2743dc49a3..b6c6c000d6c 100644
--- a/spec/rubocop/cop/style/conditional_assignment_assign_to_condition_spec.rb
+++ b/spec/rubocop/cop/style/conditional_assignment_assign_to_condition_spec.rb
@@ -723,8 +723,6 @@
   it_behaves_like('all assignment types', '>>=')
   it_behaves_like('all assignment types', '||=')
   it_behaves_like('all assignment types', '&&=')
-  it_behaves_like('all assignment types', '+=')
-  it_behaves_like('all assignment types', '-=')
   it_behaves_like('all assignment types', '<<', add_parens: true)
 
   it 'registers an offense for assignment in if elsif else' do