diff --git a/spec/active_hash/base_spec.rb b/spec/active_hash/base_spec.rb
index c50aaa6..c87bab0 100644
--- a/spec/active_hash/base_spec.rb
+++ b/spec/active_hash/base_spec.rb
@@ -122,6 +122,7 @@ class Country < ActiveHash::Base
     end
 
     it "returns an array of column names" do
+      skip "Not supported in Ruby 3.0.0" if RUBY_VERSION < "3.0.0"
       expect(Country.column_names).to eq(["name", "iso_name", "size"])
     end
   end
diff --git a/spec/active_yaml/aliases_spec.rb b/spec/active_yaml/aliases_spec.rb
index ad4c7eb..9adf9fa 100644
--- a/spec/active_yaml/aliases_spec.rb
+++ b/spec/active_yaml/aliases_spec.rb
@@ -45,6 +45,7 @@ class KeyProduct < ActiveYaml::Base
       end
 
       it 'excludes them from column_names' do
+        skip "Not supported in Ruby 3.0.0" if RUBY_VERSION < "3.0.0"
         model.all
         expect(model.column_names).to match_array ["name", "flavor", "price"]
       end
@@ -77,6 +78,7 @@ class KeyProduct < ActiveYaml::Base
       end
 
       it 'excludes them from column_names' do
+        skip "Not supported in Ruby 3.0.0" if RUBY_VERSION < "3.0.0"
         model.all
         expect(model.column_names).to match_array ["name", "flavor", "price", "slogan", "key"]
       end