diff --git a/unittests/CppInterOp/DynamicLibraryManagerTest.cpp b/unittests/CppInterOp/DynamicLibraryManagerTest.cpp
index 28c3a8a7..95ee75bd 100644
--- a/unittests/CppInterOp/DynamicLibraryManagerTest.cpp
+++ b/unittests/CppInterOp/DynamicLibraryManagerTest.cpp
@@ -58,8 +58,8 @@ TEST(DynamicLibraryManagerTest, Sanity) {
 }
 
 TEST(UtilsPlatform, DLTest) {
-  std::string err_ = "";
+  std::string err = "";
   auto dlopen_handle = Cpp::utils::platform::DLOpen(
-      "./unittests/CppInterOp/libTestSharedLib.dylib", err_);
+      "./unittests/CppInterOp/libTestSharedLib.dylib", err);
   (void)dlopen_handle;
 }