diff --git a/spec/models/domain_block_spec.rb b/spec/models/domain_block_spec.rb
index b19c8083e..89cadccfe 100644
--- a/spec/models/domain_block_spec.rb
+++ b/spec/models/domain_block_spec.rb
@@ -13,11 +13,27 @@ RSpec.describe DomainBlock, type: :model do
       expect(domain_block).to model_have_error_on_field(:domain)
     end
 
-    it 'is invalid if the domain already exists' do
-      domain_block_1 = Fabricate(:domain_block, domain: 'dalek.com')
-      domain_block_2 = Fabricate.build(:domain_block, domain: 'dalek.com')
+    it 'is invalid if the same normalized domain already exists' do
+      domain_block_1 = Fabricate(:domain_block, domain: 'にゃん')
+      domain_block_2 = Fabricate.build(:domain_block, domain: 'xn--r9j5b5b')
       domain_block_2.valid?
       expect(domain_block_2).to model_have_error_on_field(:domain)
     end
   end
+
+  describe 'blocked?' do
+    it 'returns true if the domain is suspended' do
+      Fabricate(:domain_block, domain: 'domain', severity: :suspend)
+      expect(DomainBlock.blocked?('domain')).to eq true
+    end
+
+    it 'returns false even if the domain is silenced' do
+      Fabricate(:domain_block, domain: 'domain', severity: :silence)
+      expect(DomainBlock.blocked?('domain')).to eq false
+    end
+
+    it 'returns false if the domain is not suspended nor silenced' do
+      expect(DomainBlock.blocked?('domain')).to eq false
+    end
+  end
 end