diff --git a/test/iterator_cpp11.cpp b/test/iterator_cpp11.cpp
index 4062f13b1..df5a52005 100644
--- a/test/iterator_cpp11.cpp
+++ b/test/iterator_cpp11.cpp
@@ -27,7 +27,7 @@ TEST(iterator, vector)
     vec_type vec;
     vec.reserve(VECTOR_SIZE);
     for (unsigned int i = 0; i < VECTOR_SIZE; i++) {
-        vec.push_back(rand());
+        vec.push_back(static_cast<unsigned int>(rand()));
     }
     msgpack::sbuffer sbuf;
     msgpack::pack(sbuf, vec);
@@ -53,7 +53,7 @@ TEST(iterator, map)
     using map_type = map<unsigned int, unsigned int>;
     map_type map;
     for (unsigned int i = 0; i < MAP_SIZE; i++) {
-        map[rand()] = rand();
+        map[static_cast<unsigned int>(rand())] = static_cast<unsigned int>(rand());
     }
     msgpack::sbuffer sbuf;
     msgpack::pack(sbuf, map);
diff --git a/test/size_equal_only.cpp b/test/size_equal_only.cpp
index 89e9f1e26..d4b9da48d 100644
--- a/test/size_equal_only.cpp
+++ b/test/size_equal_only.cpp
@@ -192,7 +192,6 @@ TEST(size_equal_only, tuple)
 }
 
 struct foo1 {
-    foo1() = default;
     foo1(int i, bool b):t(i, b), seo(t) {}
     std::tuple<int, bool> t;
     msgpack::type::size_equal_only<std::tuple<int, bool> > seo;
@@ -200,7 +199,6 @@ struct foo1 {
 };
 
 struct foo2 {
-    foo2() = default;
     foo2(int i, bool b, std::string const& s):t(i, b, s), seo(t) {}
     std::tuple<int, bool, std::string> t;
     msgpack::type::size_equal_only<std::tuple<int, bool, std::string> > seo;