diff --git a/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb b/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb
index 917c241346792..cae9fdb0906ce 100644
--- a/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb
+++ b/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb
@@ -647,7 +647,7 @@ def test_assign_ids
     developer.save
     developer.reload
     assert_equal 2, developer.projects.length
-    assert_equal [projects(:active_record), projects(:action_controller)].map(&:id).sort, developer.projects_ids
+    assert_equal [projects(:active_record), projects(:action_controller)].map(&:id).sort, developer.project_ids
   end
 
   def test_assign_ids_ignoring_blanks
@@ -656,7 +656,7 @@ def test_assign_ids_ignoring_blanks
     developer.save
     developer.reload
     assert_equal 2, developer.projects.length
-    assert_equal [projects(:active_record), projects(:action_controller)].map(&:id).sort, developer.projects_ids
+    assert_equal [projects(:active_record), projects(:action_controller)].map(&:id).sort, developer.project_ids
   end
 
   def test_select_limited_ids_list