diff --git a/ktorm-support-postgresql/src/test/kotlin/org/ktorm/support/postgresql/PostgreSqlTest.kt b/ktorm-support-postgresql/src/test/kotlin/org/ktorm/support/postgresql/PostgreSqlTest.kt
index e87707ec..b2d2fbb2 100644
--- a/ktorm-support-postgresql/src/test/kotlin/org/ktorm/support/postgresql/PostgreSqlTest.kt
+++ b/ktorm-support-postgresql/src/test/kotlin/org/ktorm/support/postgresql/PostgreSqlTest.kt
@@ -859,13 +859,6 @@ class PostgreSqlTest : BaseTest() {
             val arr = json<List<Int>>("arr")
         }
 
-        database.useConnection { conn ->
-            conn.createStatement().use { statement ->
-                val sql = """create table t_json (obj json, arr json)"""
-                statement.executeUpdate(sql)
-            }
-        }
-
         database.insert(t) {
             set(it.obj, Employee { name = "vince"; salary = 100 })
             set(it.arr, listOf(1, 2, 3))
diff --git a/ktorm-support-postgresql/src/test/resources/drop-postgresql-data.sql b/ktorm-support-postgresql/src/test/resources/drop-postgresql-data.sql
index c7e9d9c4..72251b2b 100644
--- a/ktorm-support-postgresql/src/test/resources/drop-postgresql-data.sql
+++ b/ktorm-support-postgresql/src/test/resources/drop-postgresql-data.sql
@@ -3,4 +3,5 @@ drop table if exists t_department;
 drop table if exists t_employee;
 drop table if exists t_metadata;
 drop table if exists t_enum;
-drop type if exists mood;
\ No newline at end of file
+drop type if exists mood;
+drop table if exists t_json;
diff --git a/ktorm-support-postgresql/src/test/resources/init-postgresql-data.sql b/ktorm-support-postgresql/src/test/resources/init-postgresql-data.sql
index a4430ad6..8e8518ce 100644
--- a/ktorm-support-postgresql/src/test/resources/init-postgresql-data.sql
+++ b/ktorm-support-postgresql/src/test/resources/init-postgresql-data.sql
@@ -29,6 +29,8 @@ create table t_enum(
    current_mood mood
 );
 
+create table t_json (obj json, arr json);
+
 insert into t_department(name, location, "mixedCase") values ('tech', 'Guangzhou', 'one');
 insert into t_department(name, location, "mixedCase") values ('finance', 'Beijing', 'two');