diff --git a/test/cases.cpp b/test/cases.cpp
index c06b4261..78a6f592 100644
--- a/test/cases.cpp
+++ b/test/cases.cpp
@@ -20,6 +20,10 @@ static void feed_file(msgpack::unpacker& pac, const char* path)
 
 TEST(cases, format)
 {
+#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7)) && !defined(__clang__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif // (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7)) && !defined(__clang__)
     msgpack::unpacker pac;
     msgpack::unpacker pac_compact;
 
@@ -34,4 +38,7 @@ TEST(cases, format)
     }
 
     EXPECT_FALSE( pac_compact.next(oh) );
+#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7)) && !defined(__clang__)
+#pragma GCC diagnostic pop
+#endif // (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7)) && !defined(__clang__)
 }