diff --git a/test/buffer.cpp b/test/buffer.cpp
index e05f2ce3..773a2a77 100644
--- a/test/buffer.cpp
+++ b/test/buffer.cpp
@@ -92,7 +92,12 @@ TEST(buffer, zbuffer_c)
 
 TEST(buffer, fbuffer)
 {
+#if defined(_MSC_VER)
+    FILE* file;
+    tmpfile_s(&file);
+#else  // defined(_MSC_VER)
     FILE* file = tmpfile();
+#endif // defined(_MSC_VER)
     EXPECT_TRUE( file != NULL );
 
     msgpack::fbuffer fbuf(file);
@@ -116,7 +121,13 @@ TEST(buffer, fbuffer)
 
 TEST(buffer, fbuffer_c)
 {
+#if defined(_MSC_VER)
+    FILE* file;
+    tmpfile_s(&file);
+#else  // defined(_MSC_VER)
     FILE* file = tmpfile();
+#endif // defined(_MSC_VER)
+
     void* fbuf = (void*)file;
 
     EXPECT_TRUE( file != NULL );
diff --git a/test/cases.cpp b/test/cases.cpp
index 45aace0b..bb9ad092 100644
--- a/test/cases.cpp
+++ b/test/cases.cpp
@@ -11,7 +11,7 @@ static void feed_file(msgpack::unpacker& pac, const char* path)
         if(fin.bad()) {
             throw std::runtime_error("read failed");
         }
-        pac.buffer_consumed(fin.gcount());
+        pac.buffer_consumed(static_cast<size_t>(fin.gcount()));
         if(fin.fail()) {
             break;
         }
@@ -35,4 +35,3 @@ TEST(cases, format)
 
     EXPECT_FALSE( pac_compact.next(&result) );
 }
-
diff --git a/test/msgpack_basic.cpp b/test/msgpack_basic.cpp
index 770af6d5..ad8dc0a5 100644
--- a/test/msgpack_basic.cpp
+++ b/test/msgpack_basic.cpp
@@ -585,7 +585,7 @@ TEST(MSGPACK_STL, simple_buffer_non_const_cstring)
       val1 += 'a' + rand() % 26;
     msgpack::sbuffer sbuf;
     char* s = new char[val1.size() + 1];
-    std::strcpy(s, val1.c_str());
+    std::memcpy(s, val1.c_str(), val1.size() + 1);
     msgpack::pack(sbuf, s);
     delete [] s;
     msgpack::unpacked ret;
diff --git a/test/raw.cpp b/test/raw.cpp
index 8c961fe4..36252d49 100644
--- a/test/raw.cpp
+++ b/test/raw.cpp
@@ -92,8 +92,8 @@ TEST(MSGPACK_RAW_REF, pack_unpack_16_h)
     msgpack::pack(ss, rr1);
     std::string packed_str = ss.str();
     EXPECT_EQ(packed_str[0], static_cast<char>(0xc5u));
-    EXPECT_EQ(packed_str[1], static_cast<char>(0xff));
-    EXPECT_EQ(packed_str[2], static_cast<char>(0xff));
+    EXPECT_EQ(packed_str[1], static_cast<char>(0xffu));
+    EXPECT_EQ(packed_str[2], static_cast<char>(0xffu));
     EXPECT_EQ(packed_str[3], 'A');
 
     msgpack::unpacked upd;
diff --git a/test/streaming.cpp b/test/streaming.cpp
index b9d2199e..54d56a51 100644
--- a/test/streaming.cpp
+++ b/test/streaming.cpp
@@ -156,7 +156,7 @@ public:
         while(true) {
             pac.reserve_buffer(32*1024);
 
-            size_t len = input.readsome(pac.buffer(), pac.buffer_capacity());
+            size_t len = static_cast<size_t>(input.readsome(pac.buffer(), pac.buffer_capacity()));
 
             if(len == 0) {
                 return;
@@ -226,7 +226,7 @@ TEST(streaming, basic_compat)
     while(count < 3) {
         pac.reserve_buffer(32*1024);
 
-        size_t len = input.readsome(pac.buffer(), pac.buffer_capacity());
+        size_t len = static_cast<size_t>(input.readsome(pac.buffer(), pac.buffer_capacity()));
         pac.buffer_consumed(len);
 
         while(pac.execute()) {
@@ -262,7 +262,7 @@ public:
         while(true) {
             pac.reserve_buffer(32*1024);
 
-            size_t len = input.readsome(pac.buffer(), pac.buffer_capacity());
+            size_t len = static_cast<size_t>(input.readsome(pac.buffer(), pac.buffer_capacity()));
 
             if(len == 0) {
                 return;