diff --git a/test/test_error_notification.cpp b/test/test_error_notification.cpp
index 71a554a..270932f 100644
--- a/test/test_error_notification.cpp
+++ b/test/test_error_notification.cpp
@@ -11,7 +11,7 @@
 namespace snmp
 {
 
-constexpr auto ERROR_NOTIF_FIELD_COUNT = 4;
+constexpr size_t ERROR_NOTIF_FIELD_COUNT = 4;
 
 class TestErrorNotification : public testing::Test
 {
diff --git a/test/test_snmp_conf_manager.cpp b/test/test_snmp_conf_manager.cpp
index de89272..13739b5 100644
--- a/test/test_snmp_conf_manager.cpp
+++ b/test/test_snmp_conf_manager.cpp
@@ -85,7 +85,7 @@
 
     // check whether the client created
     auto& clients = getSNMPClients();
-    EXPECT_EQ(1, clients.size());
+    EXPECT_EQ(1U, clients.size());
     EXPECT_EQ(true, isClientExist("192.168.1.1"));
 }
 
@@ -103,7 +103,7 @@
 
     // check both the clients get created
     auto& clients = getSNMPClients();
-    EXPECT_EQ(2, clients.size());
+    EXPECT_EQ(2U, clients.size());
 
     EXPECT_EQ(true, isClientExist("192.168.1.1"));
     EXPECT_EQ(true, isClientExist("192.168.1.2"));
@@ -123,7 +123,7 @@
     createSNMPClient("192.168.1.2", 24);
 
     auto& clients = getSNMPClients();
-    EXPECT_EQ(2, clients.size());
+    EXPECT_EQ(2U, clients.size());
 
     deleteSNMPClient("192.168.1.1");
 
@@ -132,7 +132,7 @@
     expectedPath += std::string("/3");
     EXPECT_EQ(path, expectedPath);
 
-    EXPECT_EQ(2, clients.size());
+    EXPECT_EQ(2U, clients.size());
     EXPECT_EQ(true, isClientExist("192.168.1.2"));
     EXPECT_EQ(false, isClientExist("192.168.1.1"));
     EXPECT_EQ(true, isClientExist("192.168.1.3"));