diff --git a/test/test_imp_system.cpp b/test/test_imp_system.cpp
index 6b5677c..711e3ea 100644
--- a/test/test_imp_system.cpp
+++ b/test/test_imp_system.cpp
@@ -52,6 +52,7 @@ TEST(system, error_msg) {
     EXPECT_EQ(imp::sys::error_msg({false, ERROR_INVALID_HANDLE}), s_txt);
   }
 #else
-  EXPECT_EQ(imp::sys::error_msg({false, 1234}), "Unknown error nnn");
+  EXPECT_EQ(imp::sys::error_msg({}), "");
+  EXPECT_EQ(imp::sys::error_msg({false, EINVAL}), "");
 #endif
 }
\ No newline at end of file