diff --git a/unitTests/test_helper_functions.cpp b/unitTests/test_helper_functions.cpp
index c47f753e..51f9fbb5 100644
--- a/unitTests/test_helper_functions.cpp
+++ b/unitTests/test_helper_functions.cpp
@@ -7,7 +7,7 @@ TEST(string_from_unterminated, terminatedArray)
     const char data[5] = {'a', 'b', 'c', 0, 'd'};
     const std::string res = string_from_unterminated(data, 5);
 
-    ASSERT_EQ(res.size(), 3);
+    ASSERT_EQ(res.size(), 3u);
     ASSERT_STREQ(res.c_str(), "abc");
 }
 
@@ -16,6 +16,6 @@ TEST(string_from_unterminated, unterminatedArray)
     const char data[4] = {'a', 'b', 'c', 'd'};
     const std::string res = string_from_unterminated(data, 4);
 
-    ASSERT_EQ(res.size(), 4);
+    ASSERT_EQ(res.size(), 4u);
     ASSERT_STREQ(res.c_str(), "abcd");
 }