diff --git a/components/idf_test/unit_test/TestCaseScript/IDFUnitTest/UnitTest.py b/components/idf_test/unit_test/TestCaseScript/IDFUnitTest/UnitTest.py
index ab29a97f9b..3ec87d24bc 100644
--- a/components/idf_test/unit_test/TestCaseScript/IDFUnitTest/UnitTest.py
+++ b/components/idf_test/unit_test/TestCaseScript/IDFUnitTest/UnitTest.py
@@ -25,7 +25,8 @@ class UnitTest(PerformanceTCBase.PerformanceTCBase):
         self.flush_data("UT1")
         
         try:
-            self.serial_write_line("UT1", self.test_case)
+            # add case select by name mark " before case name
+            self.serial_write_line("UT1", "/"" + self.test_case)
             data = ""
             for _ in range(self.timeout):
                 time.sleep(1) #wait for test to run before reading result