diff --git a/CMakeLists.txt b/CMakeLists.txt
index e4430af..60d5931 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,8 @@ find_package(OpenSSL 1.1.1 REQUIRED)
 
 include_directories(${Boost_INCLUDE_DIRS} ${OPENSSL_INCLUDE_DIR} ${SQLiteCpp_INCLUDE_DIRS})
 
+enable_testing()
+
 add_subdirectory(src)
 
 add_subdirectory(test)
\ No newline at end of file
diff --git a/include/debug_tools/print_tools.h b/include/debug_tools/print_tools.h
index 548764e..f128306 100644
--- a/include/debug_tools/print_tools.h
+++ b/include/debug_tools/print_tools.h
@@ -27,7 +27,7 @@ namespace Net {
 
         void printRed(string red_info);
 
-        void printInfo(const string& info, string tag = "");
+        void printInfo(const string& info, const string& tag = "");
 
         void printInfoBuffer(const string& info, const string& tag = "");
 
diff --git a/src/debug_tools/print_tools.cpp b/src/debug_tools/print_tools.cpp
index 072ab80..b84cd25 100644
--- a/src/debug_tools/print_tools.cpp
+++ b/src/debug_tools/print_tools.cpp
@@ -24,9 +24,9 @@ namespace Net {
             printf("\033[31m%s\n\033[0m", red_info.data());
         }
 
-        void printInfo(const string& info, string &tag) {
+        void printInfo(const string& info, const string& tag) {
             printf("[DEBUG INFO] %s ", info.data());
-            if(tag.size())
+            if(!tag.empty())
                 printf("{ %s }\n",tag.data());
         }
 
diff --git a/src/utils/CMakeLists.txt b/src/utils/CMakeLists.txt
index c2e71bb..be848b2 100644
--- a/src/utils/CMakeLists.txt
+++ b/src/utils/CMakeLists.txt
@@ -1 +1,3 @@
-add_library(utils STATIC rsa_key_chain.cpp)
\ No newline at end of file
+add_library(utils STATIC rsa_key_chain.cpp)
+
+target_link_libraries(utils debugTools ssl crypto)
\ No newline at end of file
diff --git a/test/test_util/CMakeLists.txt b/test/test_util/CMakeLists.txt
index 6925f9a..22e7f6b 100644
--- a/test/test_util/CMakeLists.txt
+++ b/test/test_util/CMakeLists.txt
@@ -1,9 +1,9 @@
 
-add_executable(testUtils main.cpp)
+add_executable(testUtils main.cpp test_rsa.cpp)
 
 message(${GTEST_LIBS})
 
-link_libraries(testUtils utils debugTools ${GTEST_LIBS})
+target_link_libraries(testUtils utils debugTools ${GTEST_LIBS})
 
 add_test(Name testUtils
          COMMAND testUtils)
\ No newline at end of file
diff --git a/test/test_util/test_rsa.cpp b/test/test_util/test_rsa.cpp
index 79dc25c..ac443b4 100644
--- a/test/test_util/test_rsa.cpp
+++ b/test/test_util/test_rsa.cpp
@@ -21,7 +21,8 @@ TEST(RSATest, init_test_1) {
 
 TEST(RSATest, generate_test_1) {
    env->rsa->generateKeyPair();
-   printTools::printInfo(to_string(env->rsa->getBufferSize()), string("Buffer Size"));
+   string data = std::to_string(env->rsa->getBufferSize());
+   printTools::printInfo(data, "Buffer Size");
 }
 
 TEST(RSATest, pub_encrypt_test_1) {