diff --git a/spec/serializers/nodeinfo/serializer_spec.rb b/spec/serializers/nodeinfo/serializer_spec.rb
new file mode 100644
index 0000000000..c43b0b569f
--- /dev/null
+++ b/spec/serializers/nodeinfo/serializer_spec.rb
@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe NodeInfo::Serializer do # rubocop:disable RSpec/FilePath
+  let(:serialization) do
+    JSON.parse(
+      ActiveModelSerializers::SerializableResource.new(
+        record, adapter: NodeInfo::Adapter, serializer: described_class, root: 'nodeinfo'
+      ).to_json
+    )
+  end
+  let(:record) { {} }
+
+  describe 'nodeinfo version' do
+    it 'returns 2.0' do
+      expect(serialization['version']).to eq '2.0'
+    end
+  end
+
+  describe 'mastodon version' do
+    it 'contains kmyblue' do
+      expect(serialization['software']['version'].include?('kmyblue')).to be true
+    end
+  end
+
+  describe 'metadata' do
+    it 'returns features' do
+      expect(serialization['metadata']['features']).to include 'emoji_reaction'
+    end
+  end
+end
diff --git a/spec/serializers/rest/instance_serializer_spec.rb b/spec/serializers/rest/instance_serializer_spec.rb
index 15a5de18dd..a9a3259aa8 100644
--- a/spec/serializers/rest/instance_serializer_spec.rb
+++ b/spec/serializers/rest/instance_serializer_spec.rb
@@ -17,4 +17,10 @@ describe REST::InstanceSerializer do
       expect(serialization['usage']).to eq({ 'users' => { 'active_month' => 0 } })
     end
   end
+
+  describe 'fedibird_capabilities' do
+    it 'returns fedibird_capabilities' do
+      expect(serialization['fedibird_capabilities']).to include 'emoji_reaction'
+    end
+  end
 end