diff --git a/source/client/src/clientTmq.c b/source/client/src/clientTmq.c
index ceca06e309bb10bcbbb5df9cd8b870dcc2eee6e3..fd6dc918a9e9bf336df0e3a103df5a6918cae8af 100644
--- a/source/client/src/clientTmq.c
+++ b/source/client/src/clientTmq.c
@@ -373,9 +373,6 @@ int32_t tmq_list_append(tmq_list_t* list, const char* src) {
   SArray* container = &list->container;
   if (src == NULL || src[0] == 0) return -1;
   char* topic = taosStrdup(src);
-  if (topic[0] != '`') {
-    strtolower(topic, src);
-  }
   if (taosArrayPush(container, &topic) == NULL) return -1;
   return 0;
 }
diff --git a/tests/system-test/7-tmq/stbTagFilter-1ctb.py b/tests/system-test/7-tmq/stbTagFilter-1ctb.py
index 7ee5fce5a81ffb50341a61497f5616b03040d998..d226b18d172b2c8e27df48bcc0b4f804156a2cd7 100644
--- a/tests/system-test/7-tmq/stbTagFilter-1ctb.py
+++ b/tests/system-test/7-tmq/stbTagFilter-1ctb.py
@@ -111,7 +111,7 @@ class TDTestCase:
         topicFromStb1 = 'topic_UpperCase_stb1'
         # queryString = "select ts, c1, c2 from %s.%s where t4 == 'shanghai' or t4 == 'changsha'"%(paraDict['dbName'], paraDict['stbName'])
         queryString = "select ts, c1, c2, t4 from %s.%s where t4 == 'shanghai' or t4 == 'changsha'"%(paraDict['dbName'], paraDict['stbName'])
-        sqlString = "create topic %s as %s" %(topicFromStb1, queryString)
+        sqlString = "create topic `%s` as %s" %(topicFromStb1, queryString)
         tdLog.info("create topic sql: %s"%sqlString)
         tdSql.execute(sqlString)
 
@@ -196,7 +196,7 @@ class TDTestCase:
         topicFromStb1 = 'topic_UpperCase_stb1'
         queryString = "select ts, c1, c2 from %s.%s where t4 == 'shanghai' or t4 == 'changsha'"%(paraDict['dbName'], paraDict['stbName'])
         # queryString = "select ts, c1, c2, t4 from %s.%s where t4 == 'shanghai' or t4 == 'changsha'"%(paraDict['dbName'], paraDict['stbName'])
-        sqlString = "create topic %s as %s" %(topicFromStb1, queryString)
+        sqlString = "create topic `%s` as %s" %(topicFromStb1, queryString)
         tdLog.info("create topic sql: %s"%sqlString)
         tdSql.execute(sqlString)
 
diff --git a/tests/system-test/7-tmq/stbTagFilter-multiCtb.py b/tests/system-test/7-tmq/stbTagFilter-multiCtb.py
index 71b7fdef5d6a2fc072b7a21ef4205ea7a651bce2..5ae821ad725842b48ea782acd7292206bc3b92eb 100644
--- a/tests/system-test/7-tmq/stbTagFilter-multiCtb.py
+++ b/tests/system-test/7-tmq/stbTagFilter-multiCtb.py
@@ -111,7 +111,7 @@ class TDTestCase:
         topicFromStb1 = 'topic_UpperCase_stb1'
         queryString = "select ts, c1, c2 from %s.%s where t4 == 'beijing' or t4 == 'changsha'"%(paraDict['dbName'], paraDict['stbName'])
         # queryString = "select ts, c1, c2, t4 from %s.%s where t4 == 'beijing' or t4 == 'changsha'"%(paraDict['dbName'], paraDict['stbName'])
-        sqlString = "create topic %s as %s" %(topicFromStb1, queryString)
+        sqlString = "create topic `%s` as %s" %(topicFromStb1, queryString)
         tdLog.info("create topic sql: %s"%sqlString)
         tdSql.execute(sqlString)
 
@@ -196,7 +196,7 @@ class TDTestCase:
         topicFromStb1 = 'topic_UpperCase_stb1'
         # queryString = "select ts, c1, c2 from %s.%s where t4 == 'beijing' or t4 == 'changsha'"%(paraDict['dbName'], paraDict['stbName'])
         queryString = "select ts, c1, c2, t4 from %s.%s where t4 == 'beijing' or t4 == 'changsha'"%(paraDict['dbName'], paraDict['stbName'])
-        sqlString = "create topic %s as %s" %(topicFromStb1, queryString)
+        sqlString = "create topic `%s` as %s" %(topicFromStb1, queryString)
         tdLog.info("create topic sql: %s"%sqlString)
         tdSql.execute(sqlString)
 
diff --git a/tests/system-test/7-tmq/tmqDropStb.py b/tests/system-test/7-tmq/tmqDropStb.py
index a94747e574cf1dd5b10f875dcf6c6590a3532aca..8680bdf09e1a34ab37b1a3bb08bbee61d9d7da84 100644
--- a/tests/system-test/7-tmq/tmqDropStb.py
+++ b/tests/system-test/7-tmq/tmqDropStb.py
@@ -82,7 +82,7 @@ class TDTestCase:
 
         tdLog.info("create topics from db")
         topicName1 = 'UpperCasetopic_%s'%(self.paraDict['dbName'])
-        tdSql.execute("create topic %s as database %s" %(topicName1, self.paraDict['dbName']))
+        tdSql.execute("create topic `%s` as database %s" %(topicName1, self.paraDict['dbName']))
 
         topicList = topicName1 + ',' +topicName1
         keyList = '%s,%s,%s,%s'%(self.groupId,self.autoCommit,self.autoCommitInterval,self.autoOffset)