diff --git a/.clang-tidy b/.clang-tidy
index 086b9aa..d1f674c 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -198,6 +198,7 @@
 cppcoreguidelines-avoid-goto,
 cppcoreguidelines-avoid-non-const-global-variables,
 cppcoreguidelines-c-copy-assignment-signature,
+cppcoreguidelines-explicit-virtual-functions,
 cppcoreguidelines-narrowing-conversions,
 cppcoreguidelines-no-malloc,
 cppcoreguidelines-prefer-member-initializer,
diff --git a/activation.hpp b/activation.hpp
index 8552e88..2a83569 100644
--- a/activation.hpp
+++ b/activation.hpp
@@ -135,7 +135,7 @@
         enableRebootGuard();
     }
 
-    ~ActivationBlocksTransition()
+    ~ActivationBlocksTransition() override
     {
         disableRebootGuard();
     }
diff --git a/test/utest.cpp b/test/utest.cpp
index 8f400ff..831d9b3 100644
--- a/test/utest.cpp
+++ b/test/utest.cpp
@@ -24,7 +24,7 @@
 class VersionTest : public testing::Test
 {
   protected:
-    virtual void SetUp()
+    void SetUp() override
     {
         char versionDir[] = "./versionXXXXXX";
         _directory = mkdtemp(versionDir);
@@ -35,7 +35,7 @@
         }
     }
 
-    virtual void TearDown()
+    void TearDown() override
     {
         fs::remove_all(_directory);
     }
@@ -183,7 +183,7 @@
             std::cout << "COMMAND Error: " << val << std::endl;
         }
     }
-    virtual void SetUp()
+    void SetUp() override
     {
         // Create test base directory.
         fs::create_directories(testPath);
@@ -269,7 +269,7 @@
 
         signature = std::make_unique<Signature>(extractPath, signedConfPath);
     }
-    virtual void TearDown()
+    void TearDown() override
     {
         command("rm -rf " + std::string(testPath));
     }
@@ -378,7 +378,7 @@
         }
     }
 
-    virtual void SetUp()
+    void SetUp() override
     {
         // Create test base directory.
         tmpDir = fs::temp_directory_path() / "testFileXXXXXX";
@@ -396,7 +396,7 @@
         srcFiles.push_back(file2);
     }
 
-    virtual void TearDown()
+    void TearDown() override
     {
         fs::remove_all(tmpDir);
     }