diff --git a/tests/develop-test/2-query/function_unique.py b/tests/develop-test/2-query/function_unique.py
index cb6f372ffb48dcd098db0e9f21752d3dd57ba1e9..8a8e0bef2b737e09cea99754dad948b72b12f232 100644
--- a/tests/develop-test/2-query/function_unique.py
+++ b/tests/develop-test/2-query/function_unique.py
@@ -276,7 +276,7 @@ class TDTestCase:
         tdSql.checkData(0, 1, 1)
         tdSql.checkData(3, 1, 1)
 
-        tdSql.execute('create table unique1 (ts timestamp, voltage bigint,num smallint, dbool bool, dtiny tinyint unsigned, dfloat float, ddouble double, dchar nchar(4093), dbinary binary(64), dtime timestamp) tags (jtag json)')
+        tdSql.execute('create table unique1 (ts timestamp, voltage bigint,num smallint, dbool bool, dtiny tinyint unsigned, dfloat float, ddouble double, dchar nchar(64), dbinary binary(64), dtime timestamp) tags (jtag json)')
         tdSql.execute('create table D011 using unique1 tags (\'{"k1":"v1"}\')')
         tdSql.execute('create table D012 using unique1 tags (\'{"k1":"v1","k2":7}\')')
         tdSql.execute('create table D013 using unique1 tags (\'{"k3":"v3"}\')')