diff --git a/spec/models/glitch/keyword_mute_spec.rb b/spec/models/glitch/keyword_mute_spec.rb
index bab276c2672..0ffc7b18f23 100644
--- a/spec/models/glitch/keyword_mute_spec.rb
+++ b/spec/models/glitch/keyword_mute_spec.rb
@@ -93,4 +93,65 @@ RSpec.describe Glitch::KeywordMute, type: :model do
       end
     end
   end
+
+  describe '.tag_matcher_for' do
+    let(:matcher) { Glitch::KeywordMute.tag_matcher_for(alice.id) }
+    let(:status) { Fabricate(:status) }
+
+    describe 'with no mutes' do
+      before do
+        Glitch::KeywordMute.delete_all
+      end
+
+      it 'does not match' do
+        status.tags << Fabricate(:tag, name: 'xyzzy')
+
+        expect(matcher.matches?(status.tags)).to be false
+      end
+    end
+
+    describe 'with mutes' do
+      it 'does not match keywords set by a different account' do
+        status.tags << Fabricate(:tag, name: 'xyzzy')
+        Glitch::KeywordMute.create!(account: bob, keyword: 'take')
+
+        expect(matcher.matches?(status.tags)).to be false
+      end
+
+      it 'matches #xyzzy when given the mute "#xyzzy"' do
+        status.tags << Fabricate(:tag, name: 'xyzzy')
+        Glitch::KeywordMute.create!(account: alice, keyword: '#xyzzy')
+
+        expect(matcher.matches?(status.tags)).to be true
+      end
+
+      it 'matches #thingiverse when given the non-whole-word mute "#thing"' do
+        status.tags << Fabricate(:tag, name: 'thingiverse')
+        Glitch::KeywordMute.create!(account: alice, keyword: '#thing', whole_word: false)
+
+        expect(matcher.matches?(status.tags)).to be true
+      end
+
+      it 'matches #hashtag when given the mute "##hashtag""' do
+        status.tags << Fabricate(:tag, name: 'hashtag')
+        Glitch::KeywordMute.create!(account: alice, keyword: '##hashtag')
+
+        expect(matcher.matches?(status.tags)).to be true
+      end
+
+      it 'matches #oatmeal when given the non-whole-word mute "oat"' do
+        status.tags << Fabricate(:tag, name: 'oatmeal')
+        Glitch::KeywordMute.create!(account: alice, keyword: 'oat', whole_word: false)
+
+        expect(matcher.matches?(status.tags)).to be true
+      end
+
+      it 'does not match #oatmeal when given the mute "#oat"' do
+        status.tags << Fabricate(:tag, name: 'oatmeal')
+        Glitch::KeywordMute.create!(account: alice, keyword: 'oat')
+
+        expect(matcher.matches?(status.tags)).to be false
+      end
+    end
+  end
 end