diff --git a/.clang-tidy b/.clang-tidy
index 53684d8..0b9563b 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -235,6 +235,7 @@
 readability-function-size,
 readability-identifier-naming,
 readability-isolate-declaration,
+readability-make-member-function-const,
 readability-misleading-indentation,
 readability-misplaced-array-index,
 readability-named-parameter,
diff --git a/test/test_activation.cpp b/test/test_activation.cpp
index f63ee11..b7ec3d5 100644
--- a/test/test_activation.cpp
+++ b/test/test_activation.cpp
@@ -44,23 +44,23 @@
         utils::freeUtils();
     }
 
-    void onUpdateDone()
+    void onUpdateDone() const
     {
         activation->onUpdateDone();
     }
-    void onUpdateFailed()
+    void onUpdateFailed() const
     {
         activation->onUpdateFailed();
     }
-    int getProgress()
+    int getProgress() const
     {
         return activation->activationProgress->progress();
     }
-    const auto& getPsuQueue()
+    const auto& getPsuQueue() const
     {
         return activation->psuQueue;
     }
-    std::string getUpdateService(const std::string& psuInventoryPath)
+    std::string getUpdateService(const std::string& psuInventoryPath) const
     {
         return activation->getUpdateService(psuInventoryPath);
     }
diff --git a/test/test_item_updater.cpp b/test/test_item_updater.cpp
index c231654..58125c7 100644
--- a/test/test_item_updater.cpp
+++ b/test/test_item_updater.cpp
@@ -41,7 +41,7 @@
         utils::freeUtils();
     }
 
-    auto& GetActivations()
+    auto& GetActivations() const
     {
         return itemUpdater->activations;
     }
@@ -52,12 +52,12 @@
     }
 
     void onPsuInventoryChanged(const std::string& psuPath,
-                               const Properties& properties)
+                               const Properties& properties) const
     {
         itemUpdater->onPsuInventoryChanged(psuPath, properties);
     }
 
-    void scanDirectory(const fs::path& p)
+    void scanDirectory(const fs::path& p) const
     {
         itemUpdater->scanDirectory(p);
     }