diff --git a/spec/lib/onebox/engine/twitch_clips_onebox_spec.rb b/spec/lib/onebox/engine/twitch_clips_onebox_spec.rb
index 0c799a2983b..a0c620013b2 100644
--- a/spec/lib/onebox/engine/twitch_clips_onebox_spec.rb
+++ b/spec/lib/onebox/engine/twitch_clips_onebox_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 RSpec.describe Onebox::Engine::TwitchClipsOnebox do
-  let(:hostname) { "www.example.com" }
+  let(:hostname) { Discourse.current_hostname }
   let(:options) { { hostname: hostname } }
 
   it "has the iframe with the correct channel" do
diff --git a/spec/lib/onebox/engine/twitch_stream_onebox_spec.rb b/spec/lib/onebox/engine/twitch_stream_onebox_spec.rb
index f8485f5b271..0015fd7b535 100644
--- a/spec/lib/onebox/engine/twitch_stream_onebox_spec.rb
+++ b/spec/lib/onebox/engine/twitch_stream_onebox_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 RSpec.describe Onebox::Engine::TwitchStreamOnebox do
-  let(:hostname) { "www.example.com" }
+  let(:hostname) { Discourse.current_hostname }
   let(:options) { { hostname: hostname } }
 
   it "has the iframe with the correct channel" do
diff --git a/spec/lib/onebox/engine/twitch_video_onebox_spec.rb b/spec/lib/onebox/engine/twitch_video_onebox_spec.rb
index fd6ddd41902..b9e3d168a0a 100644
--- a/spec/lib/onebox/engine/twitch_video_onebox_spec.rb
+++ b/spec/lib/onebox/engine/twitch_video_onebox_spec.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 RSpec.describe Onebox::Engine::TwitchVideoOnebox do
-  let(:hostname) { "www.example.com" }
+  let(:hostname) { Discourse.current_hostname }
   let(:options) { { hostname: hostname } }
 
   it "has the iframe with the correct channel" do