diff --git a/mocks/include/mocks/TwitchIrcServer.hpp b/mocks/include/mocks/TwitchIrcServer.hpp
index d218192b3..8f8de58a8 100644
--- a/mocks/include/mocks/TwitchIrcServer.hpp
+++ b/mocks/include/mocks/TwitchIrcServer.hpp
@@ -26,6 +26,7 @@ public:
         , mentionsChannel(std::shared_ptr<Channel>(new MockChannel("forsen3")))
         , liveChannel(std::shared_ptr<Channel>(new MockChannel("forsen")))
         , automodChannel(std::shared_ptr<Channel>(new MockChannel("forsen2")))
+        , channelNamesById_(1)
     {
     }
 
@@ -49,6 +50,14 @@ public:
         return {};
     }
 
+    std::optional<QString> getOrPopulateChannelCache(
+        const QString &channelId) override
+    {
+        assert(false &&
+               "unimplemented getOrPopulateChannelCache in mock irc server");
+        return {};
+    }
+
     void addFakeMessage(const QString &data) override
     {
     }
@@ -148,6 +157,7 @@ public:
     ChannelPtr mentionsChannel;
     ChannelPtr liveChannel;
     ChannelPtr automodChannel;
+    UniqueAccess<cache::lru_cache<QString, QString>> channelNamesById_;
     QString lastUserThatWhisperedMe{"forsen"};
 
     std::unordered_map<QString, std::weak_ptr<Channel>> mockChannels;