diff --git a/tests/ut/ge/graph/preprocess/graph_preprocess_unittest.cc b/tests/ut/ge/graph/preprocess/graph_preprocess_unittest.cc
index ba3ec63d..e8175f39 100644
--- a/tests/ut/ge/graph/preprocess/graph_preprocess_unittest.cc
+++ b/tests/ut/ge/graph/preprocess/graph_preprocess_unittest.cc
@@ -34,7 +34,7 @@ namespace ge {
 class UtestGraphPreproces : public testing::Test {
  protected:
   void SetUp() {
-    map<string, string> options;
+    map<AscendString, AscendString> options;
     ge::Status ret = ge::GEInitialize(options);
     EXPECT_EQ(ret, ge::SUCCESS);
   }