1 files changed, 2 insertions, 10 deletions
diff --git a/spec/ruby/optional/capi/ext/object_spec.c b/spec/ruby/optional/capi/ext/object_spec.c
index 7023c29bdb..1d3a1ed476 100644
--- a/spec/ruby/optional/capi/ext/object_spec.c
+++ b/spec/ruby/optional/capi/ext/object_spec.c
@@ -388,16 +388,8 @@ static VALUE object_spec_rb_ivar_foreach(VALUE self, VALUE obj) {
 }
 
 static VALUE speced_allocator(VALUE klass) {
-  VALUE flags = 0;
-  VALUE instance;
-  if (RTEST(rb_class_inherited_p(klass, rb_cString))) {
-    flags = T_STRING;
-  } else if (RTEST(rb_class_inherited_p(klass, rb_cArray))) {
-    flags = T_ARRAY;
-  } else {
-    flags = T_OBJECT;
-  }
-  instance = rb_newobj_of(klass, flags);
+  VALUE super = rb_class_get_superclass(klass);
+  VALUE instance = rb_get_alloc_func(super)(klass);
   rb_iv_set(instance, "@from_custom_allocator", Qtrue);
   return instance;
 }