diff --git a/tests/testfggl/util/guid.cpp b/tests/testfggl/util/guid.cpp
index d70fa0f5dd2ca31241d4368ef68c95a5822cb01e..b1795f7f007bfa2ae1a39fdd1a4d7382f872a075 100644
--- a/tests/testfggl/util/guid.cpp
+++ b/tests/testfggl/util/guid.cpp
@@ -108,9 +108,11 @@ namespace {
 		EXPECT_EQ( false, guid2 < guid1);
 	}
 
+	#ifdef DEBUG
 	TEST(GuidTest, GuidToString) {
 		fggl::util::GUID guid = fggl::util::internString("test");
 		EXPECT_EQ("test", fggl::util::guidToString(guid));
 	}
+	#endif
 
 }