Stick to bundle < 2

appveyor.yml

@@ -4,6 +4,7 @@ skip_tags: true
 
 environment:
   JRUBY_OPTS: "--dev -J-Xmx1024M --debug"
+  RAILS_VERSION: 5.2
   matrix:
     - ruby_version: "Ruby23"
     - ruby_version: "Ruby23-x64"
@@ -13,6 +14,9 @@ cache:
 
 install:
   - SET PATH=C:\%ruby_version%\bin;%PATH%
+  - gem uninstall bundler -a -x -I
+  - gem update --system 2.7.9
+  - # gem install bundler -v '1.17.3'
   - bundle env
   - bundle check || bundle install --path=vendor/bundle --retry=3 --jobs=3
   - bundle clean --force

test/cache_test.rb

@@ -164,7 +164,7 @@ module ActiveModelSerializers
 
       assert_equal 'Foo', author_json[:name]
 
-      author.update_attributes(name: 'Bar')
+      author.update(name: 'Bar')
       author_json = AuthorSerializerWithCache.new(author).as_json
 
       expected = 'Bar'
@@ -202,10 +202,12 @@ module ActiveModelSerializers
       end
 
       bar = 'Bar'
-      author.update!(name: bar)
+      Timecop.travel(10.seconds.from_now) do
+        author.update!(name: bar)
 
-      collection_json = render_object_with_cache(author_collection, each_serializer: AuthorSerializerWithCache)
-      assert_equal [{ name: bar }, { name: bar }, { name: foo2 }], collection_json
+        collection_json = render_object_with_cache(author_collection, each_serializer: AuthorSerializerWithCache)
+        assert_equal [{ name: bar }, { name: bar }, { name: foo2 }], collection_json
+      end
     ensure
       ARModels::Author.cache_versioning = original_cache_versioning unless original_cache_versioning == :none
     end