diff --git a/src/gui/query/metadata_query.h b/src/gui/query/metadata_query.h
index e362f8f3..a167d47d 100644
--- a/src/gui/query/metadata_query.h
+++ b/src/gui/query/metadata_query.h
@@ -56,7 +56,7 @@ protected:
 
     auto messages = metadata.Messages();
     auto statusMessages = file->GetStatusMessages();
-    auto validityMessages = CheckInstallValidity(file, metadata);
+    auto validityMessages = state_.getCurrentGame().CheckInstallValidity(file, metadata);
     messages.insert(end(messages), begin(statusMessages), end(statusMessages));
     messages.insert(end(messages), begin(validityMessages), end(validityMessages));
     metadata.Messages(messages);
@@ -155,49 +155,6 @@ private:
     }
   }
 
-  std::vector<Message> CheckInstallValidity(std::shared_ptr<const PluginInterface> plugin, const PluginMetadata& metadata) {
-    BOOST_LOG_TRIVIAL(trace) << "Checking that the current install is valid according to " << plugin->GetName() << "'s data.";
-    std::vector<Message> messages;
-    if (state_.getCurrentGame().IsPluginActive(plugin->GetName())) {
-      auto pluginExists = [&](const std::string& file) {
-        return boost::filesystem::exists(state_.getCurrentGame().DataPath() / file)
-          || ((boost::iends_with(file, ".esp") || boost::iends_with(file, ".esm")) && boost::filesystem::exists(state_.getCurrentGame().DataPath() / (file + ".ghost")));
-      };
-      auto tags = metadata.Tags();
-      if (tags.find(Tag("Filter")) == std::end(tags)) {
-        for (const auto &master : plugin->GetMasters()) {
-          if (!pluginExists(master)) {
-            BOOST_LOG_TRIVIAL(error) << "\"" << plugin->GetName() << "\" requires \"" << master << "\", but it is missing.";
-            messages.push_back(Message(MessageType::error, (boost::format(boost::locale::translate("This plugin requires \"%1%\" to be installed, but it is missing.")) % master).str()));
-          } else if (!state_.getCurrentGame().IsPluginActive(master)) {
-            BOOST_LOG_TRIVIAL(error) << "\"" << plugin->GetName() << "\" requires \"" << master << "\", but it is inactive.";
-            messages.push_back(Message(MessageType::error, (boost::format(boost::locale::translate("This plugin requires \"%1%\" to be active, but it is inactive.")) % master).str()));
-          }
-        }
-      }
-
-      for (const auto &req : metadata.Reqs()) {
-        if (!pluginExists(req.Name())) {
-          BOOST_LOG_TRIVIAL(error) << "\"" << plugin->GetName() << "\" requires \"" << req.Name() << "\", but it is missing.";
-          messages.push_back(Message(MessageType::error, (boost::format(boost::locale::translate("This plugin requires \"%1%\" to be installed, but it is missing.")) % req.Name()).str()));
-        }
-      }
-      for (const auto &inc : metadata.Incs()) {
-        if (pluginExists(inc.Name()) && state_.getCurrentGame().IsPluginActive(inc.Name())) {
-          BOOST_LOG_TRIVIAL(error) << "\"" << plugin->GetName() << "\" is incompatible with \"" << inc.Name() << "\", but both are present.";
-          messages.push_back(Message(MessageType::error, (boost::format(boost::locale::translate("This plugin is incompatible with \"%1%\", but both are present.")) % inc.Name()).str()));
-        }
-      }
-    }
-
-    // Also generate dirty messages.
-    for (const auto &element : metadata.DirtyInfo()) {
-      messages.push_back(element.AsMessage());
-    }
-
-    return messages;
-  }
-
   LootState& state_;
 };
 }
diff --git a/src/gui/state/game.cpp b/src/gui/state/game.cpp
index ea00c30b..b8924227 100644
--- a/src/gui/state/game.cpp
+++ b/src/gui/state/game.cpp
@@ -128,6 +128,49 @@ std::set<std::shared_ptr<const PluginInterface>> Game::GetPlugins() const {
   return gameHandle_->GetLoadedPlugins();
 }
 
+std::vector<Message> Game::CheckInstallValidity(std::shared_ptr<const PluginInterface> plugin, const PluginMetadata & metadata) {
+  BOOST_LOG_TRIVIAL(trace) << "Checking that the current install is valid according to " << plugin->GetName() << "'s data.";
+  std::vector<Message> messages;
+  if (IsPluginActive(plugin->GetName())) {
+    auto pluginExists = [&](const std::string& file) {
+      return boost::filesystem::exists(DataPath() / file)
+        || ((boost::iends_with(file, ".esp") || boost::iends_with(file, ".esm")) && boost::filesystem::exists(DataPath() / (file + ".ghost")));
+    };
+    auto tags = metadata.Tags();
+    if (tags.find(Tag("Filter")) == std::end(tags)) {
+      for (const auto &master : plugin->GetMasters()) {
+        if (!pluginExists(master)) {
+          BOOST_LOG_TRIVIAL(error) << "\"" << plugin->GetName() << "\" requires \"" << master << "\", but it is missing.";
+          messages.push_back(Message(MessageType::error, (boost::format(boost::locale::translate("This plugin requires \"%1%\" to be installed, but it is missing.")) % master).str()));
+        } else if (!IsPluginActive(master)) {
+          BOOST_LOG_TRIVIAL(error) << "\"" << plugin->GetName() << "\" requires \"" << master << "\", but it is inactive.";
+          messages.push_back(Message(MessageType::error, (boost::format(boost::locale::translate("This plugin requires \"%1%\" to be active, but it is inactive.")) % master).str()));
+        }
+      }
+    }
+
+    for (const auto &req : metadata.Reqs()) {
+      if (!pluginExists(req.Name())) {
+        BOOST_LOG_TRIVIAL(error) << "\"" << plugin->GetName() << "\" requires \"" << req.Name() << "\", but it is missing.";
+        messages.push_back(Message(MessageType::error, (boost::format(boost::locale::translate("This plugin requires \"%1%\" to be installed, but it is missing.")) % req.Name()).str()));
+      }
+    }
+    for (const auto &inc : metadata.Incs()) {
+      if (pluginExists(inc.Name()) && IsPluginActive(inc.Name())) {
+        BOOST_LOG_TRIVIAL(error) << "\"" << plugin->GetName() << "\" is incompatible with \"" << inc.Name() << "\", but both are present.";
+        messages.push_back(Message(MessageType::error, (boost::format(boost::locale::translate("This plugin is incompatible with \"%1%\", but both are present.")) % inc.Name()).str()));
+      }
+    }
+  }
+
+  // Also generate dirty messages.
+  for (const auto &element : metadata.DirtyInfo()) {
+    messages.push_back(element.AsMessage());
+  }
+
+  return messages;
+}
+
 void Game::RedatePlugins() {
   if (Type() != GameType::tes5 && Type() != GameType::tes5se) {
     BOOST_LOG_TRIVIAL(warning) << "Cannot redate plugins for game " << Name();
diff --git a/src/gui/state/game.h b/src/gui/state/game.h
index a58e5638..1138d51c 100644
--- a/src/gui/state/game.h
+++ b/src/gui/state/game.h
@@ -51,6 +51,7 @@ public:
 
   std::shared_ptr<const PluginInterface> GetPlugin(const std::string& name) const;
   std::set<std::shared_ptr<const PluginInterface>> GetPlugins() const;
+  std::vector<Message> CheckInstallValidity(std::shared_ptr<const PluginInterface> plugin, const PluginMetadata& metadata);
 
   void RedatePlugins();  //Change timestamps to match load order (Skyrim only).
 
diff --git a/src/tests/gui/state/game_test.h b/src/tests/gui/state/game_test.h
index 1cc3ecfd..b59f0e45 100644
--- a/src/tests/gui/state/game_test.h
+++ b/src/tests/gui/state/game_test.h
@@ -171,6 +171,82 @@ TEST_P(GameTest, initShouldNotThrowIfGameAndLocalPathsAreNotEmpty) {
   EXPECT_NO_THROW(game.Init());
 }
 
+TEST_P(GameTest, checkInstallValidityShouldCheckThatRequirementsArePresent) {
+  Game game = Game(GameSettings(GetParam()).SetGamePath(dataPath.parent_path()), "", localPath);
+  game.LoadAllInstalledPlugins(true);
+
+  PluginMetadata metadata(blankEsm);
+  metadata.Reqs({
+    File(missingEsp),
+    File(blankEsp),
+  });
+
+  auto messages = game.CheckInstallValidity(game.GetPlugin(blankEsm), metadata);
+  EXPECT_EQ(std::vector<Message>({
+    Message(MessageType::error, "This plugin requires \"" + missingEsp + "\" to be installed, but it is missing."),
+  }), messages);
+}
+
+TEST_P(GameTest, checkInstallValidityShouldCheckThatIncompatibilitiesAreAbsent) {
+  Game game = Game(GameSettings(GetParam()).SetGamePath(dataPath.parent_path()), "", localPath);
+  game.LoadAllInstalledPlugins(true);
+
+  PluginMetadata metadata(blankEsm);
+  metadata.Incs({
+    File(missingEsp),
+    File(masterFile),
+  });
+
+  auto messages = game.CheckInstallValidity(game.GetPlugin(blankEsm), metadata);
+  EXPECT_EQ(std::vector<Message>({
+    Message(MessageType::error, "This plugin is incompatible with \"" + masterFile + "\", but both are present."),
+  }), messages);
+}
+
+TEST_P(GameTest, checkInstallValidityShouldGenerateMessagesFromDirtyInfo) {
+  Game game = Game(GameSettings(GetParam()).SetGamePath(dataPath.parent_path()), "", localPath);
+  game.LoadAllInstalledPlugins(true);
+
+  PluginMetadata metadata(blankEsm);
+  const std::vector<MessageContent> info = std::vector<MessageContent>({
+    MessageContent("info", LanguageCode::english),
+  });
+
+  metadata.DirtyInfo({
+    PluginCleaningData(blankEsmCrc, "utility1", info, 0, 1, 2),
+    PluginCleaningData(0xDEADBEEF, "utility2", info, 0, 5, 10),
+  });
+
+  auto messages = game.CheckInstallValidity(game.GetPlugin(blankEsm), metadata);
+  EXPECT_EQ(std::vector<Message>({
+    PluginCleaningData(blankEsmCrc, "utility1", info, 0, 1, 2).AsMessage(),
+    PluginCleaningData(0xDEADBEEF, "utility2", info, 0, 5, 10).AsMessage(),
+  }), messages);
+}
+
+TEST_P(GameTest, checkInstallValidityShouldCheckIfAPluginsMastersAreAllPresentAndActiveIfNoFilterTagIsPresent) {
+  Game game = Game(GameSettings(GetParam()).SetGamePath(dataPath.parent_path()), "", localPath);
+  game.LoadAllInstalledPlugins(true);
+
+  PluginMetadata metadata(blankDifferentMasterDependentEsp);
+
+  auto messages = game.CheckInstallValidity(game.GetPlugin(blankDifferentMasterDependentEsp), metadata);
+  EXPECT_EQ(std::vector<Message>({
+    Message(MessageType::error, "This plugin requires \"" + blankDifferentEsm + "\" to be active, but it is inactive."),
+  }), messages);
+}
+
+TEST_P(GameTest, checkInstallValidityShouldNotCheckIfAPluginsMastersAreAllActiveIfAFilterTagIsPresent) {
+  Game game = Game(GameSettings(GetParam()).SetGamePath(dataPath.parent_path()), "", localPath);
+  game.LoadAllInstalledPlugins(true);
+
+  PluginMetadata metadata(blankDifferentMasterDependentEsp);
+  metadata.Tags({Tag("Filter")});
+
+  auto messages = game.CheckInstallValidity(game.GetPlugin(blankDifferentMasterDependentEsp), metadata);
+  EXPECT_TRUE(messages.empty());
+}
+
 TEST_P(GameTest, redatePluginsShouldRedatePluginsForSkyrimAndSkyrimSEAndDoNothingForOtherGames) {
   Game game = Game(GameSettings(GetParam()).SetGamePath(dataPath.parent_path()), "", localPath);
   game.Init();