diff --git a/src/util/src/tutil.c b/src/util/src/tutil.c
index b27196da651e0bff321fe5b4e38927f141ff00e6..02498e222212fada5b7a9f39fbcfe5c76494a651 100644
--- a/src/util/src/tutil.c
+++ b/src/util/src/tutil.c
@@ -57,9 +57,8 @@ int32_t strdequote(char *z) {
   return j + 1;  // only one quote, do nothing
 }
 
-
+// delete escape character: \\, \', \"
 int32_t strRmquote(char *z, int32_t len){
-  // delete escape character: \\, \', \"
   char delim = 0;
   int32_t cnt = 0;
   int32_t j = 0;
@@ -82,6 +81,7 @@ int32_t strRmquote(char *z, int32_t len){
     z[j] = z[k];
     j++;
   }
+  z[j] = 0;
   return j;
 }
 
diff --git a/src/util/tests/stringTest.cpp b/src/util/tests/stringTest.cpp
index 97a994f5446a3bf357fa239c5192957f32aead5b..e304ccaec6753ed627418ea8bf2fd428ae710859 100644
--- a/src/util/tests/stringTest.cpp
+++ b/src/util/tests/stringTest.cpp
@@ -8,24 +8,40 @@
 
 TEST(testCase, str_rmquote_test) {
   char    t1[] = "\"\".dd";
-  int32_t len = strRmquote(t1);
-
+  int32_t len = strRmquote(t1, strlen(t1));
   printf("t1:%s, len:%d\n", t1, len);
+  EXPECT_EQ(3, len);
+  EXPECT_STRCASEEQ(t1, ".dd");
 
   char    t2[] = "\"fsd\\\"fs\".dd";
-  len = strRmquote(t2);
-
+  len = strRmquote(t2, strlen(t2));
   printf("t2:%s, len:%d\n", t2, len);
+  EXPECT_EQ(9, len);
+  EXPECT_STRCASEEQ(t2, "fsd\"fs.dd");
 
   char    t3[] = "fs\\_d\\%.d\\d";
-  len = strRmquote(t3);
-
+  len = strRmquote(t3, strlen(t3));
   printf("t3:%s, len:%d\n", t3, len);
+  EXPECT_EQ(10, len);
+  EXPECT_STRCASEEQ(t3, "fs\\_d\\%.dd");
 
   char    t4[] = "\"fs\\_d\\%\".dd";
-  len = strRmquote(t4);
-
+  len = strRmquote(t4, strlen(t4));
   printf("t4:%s, len:%d\n", t4, len);
+  EXPECT_EQ(10, len);
+  EXPECT_STRCASEEQ(t4, "fs\\_d\\%.dd");
+
+  char    t5[] = "\"fs\\_d\\%\"";
+  len = strRmquote(t5, strlen(t5));
+  printf("t5:%s, len:%d\n", t5, len);
+  EXPECT_EQ(7, len);
+  EXPECT_STRCASEEQ(t5, "fs\\_d\\%");
+
+  char    t6[] = "'fs\\_d\\%'";
+  len = strRmquote(t6, strlen(t6));
+  printf("t6:%s, len:%d\n", t6, len);
+  EXPECT_EQ(7, len);
+  EXPECT_STRCASEEQ(t6, "fs\\_d\\%");
 }
 
 TEST(testCase, string_dequote_test) {