diff --git a/flink-table/flink-table-planner/src/test/scala/org/apache/flink/table/planner/runtime/stream/sql/AggregateITCase.scala b/flink-table/flink-table-planner/src/test/scala/org/apache/flink/table/planner/runtime/stream/sql/AggregateITCase.scala
index d3dbd058cd639..53e70a106104a 100644
--- a/flink-table/flink-table-planner/src/test/scala/org/apache/flink/table/planner/runtime/stream/sql/AggregateITCase.scala
+++ b/flink-table/flink-table-planner/src/test/scala/org/apache/flink/table/planner/runtime/stream/sql/AggregateITCase.scala
@@ -1335,16 +1335,17 @@ class AggregateITCase(aggMode: AggMode, miniBatch: MiniBatchMode, backend: State
   def testMinMaxWithChar(): Unit = {
     val data =
       List(
-        rowOf(1, "a"),
-        rowOf(1, "b"),
-        rowOf(2, "d"),
-        rowOf(2, "c")
+        rowOf(1, "a", "gg"),
+        rowOf(1, "b", "hh"),
+        rowOf(2, "d", "j"),
+        rowOf(2, "c", "i")
       )
     val dataId = TestValuesTableFactory.registerData(data)
     tEnv.executeSql(s"""
                        |CREATE TABLE src(
                        |  `id` INT,
-                       |  `char` CHAR(1)
+                       |  `char1` CHAR(1),
+                       |  `char2` CHAR(2)
                        |) WITH (
                        |  'connector' = 'values',
                        |  'data-id' = '$dataId'
@@ -1353,14 +1354,14 @@ class AggregateITCase(aggMode: AggMode, miniBatch: MiniBatchMode, backend: State
 
     val sql =
       """
-        |select `id`, count(*), min(`char`), max(`char`) from src group by `id`
+        |select `id`, count(*), min(`char1`), max(`char1`), min(`char2`), max(`char2`)  from src group by `id`
       """.stripMargin
 
     val sink = new TestingRetractSink()
     tEnv.sqlQuery(sql).toRetractStream[Row].addSink(sink)
     env.execute()
 
-    val expected = List("1,2,a,b", "2,2,c,d")
+    val expected = List("1,2,a,b,gg,hh", "2,2,c,d,i,j")
     assertThat(sink.getRetractResults.sorted).isEqualTo(expected.sorted)
   }
 
@@ -1368,24 +1369,25 @@ class AggregateITCase(aggMode: AggMode, miniBatch: MiniBatchMode, backend: State
   def testRetractMinMaxWithChar(): Unit = {
     val data =
       List(
-        changelogRow("+I", Int.box(1), "a"),
-        changelogRow("+I", Int.box(1), "b"),
-        changelogRow("+I", Int.box(1), "c"),
-        changelogRow("-D", Int.box(1), "c"),
-        changelogRow("-D", Int.box(1), "a"),
-        changelogRow("+I", Int.box(2), "a"),
-        changelogRow("+I", Int.box(2), "b"),
-        changelogRow("+I", Int.box(2), "c"),
-        changelogRow("-U", Int.box(2), "b"),
-        changelogRow("+U", Int.box(2), "d"),
-        changelogRow("-U", Int.box(2), "a"),
-        changelogRow("+U", Int.box(2), "b")
+        changelogRow("+I", Int.box(1), "a", "ee"),
+        changelogRow("+I", Int.box(1), "b", "ff"),
+        changelogRow("+I", Int.box(1), "c", "gg"),
+        changelogRow("-D", Int.box(1), "c", "gg"),
+        changelogRow("-D", Int.box(1), "a", "ee"),
+        changelogRow("+I", Int.box(2), "a", "e"),
+        changelogRow("+I", Int.box(2), "b", "f"),
+        changelogRow("+I", Int.box(2), "c", "g"),
+        changelogRow("-U", Int.box(2), "b", "f"),
+        changelogRow("+U", Int.box(2), "d", "h"),
+        changelogRow("-U", Int.box(2), "a", "e"),
+        changelogRow("+U", Int.box(2), "b", "f")
       )
     val dataId = TestValuesTableFactory.registerData(data)
     tEnv.executeSql(s"""
                        |CREATE TABLE src(
                        |  `id` INT,
-                       |  `char` CHAR(1)
+                       |  `char1` CHAR(1),
+                       |  `char2` CHAR(2)
                        |) WITH (
                        |  'connector' = 'values',
                        |  'data-id' = '$dataId',
@@ -1395,14 +1397,14 @@ class AggregateITCase(aggMode: AggMode, miniBatch: MiniBatchMode, backend: State
 
     val sql =
       """
-        |select `id`, count(*), min(`char`), max(`char`) from src group by `id`
+        |select `id`, count(*), min(`char1`), max(`char1`), min(`char2`), max(`char2`) from src group by `id`
       """.stripMargin
 
     val sink = new TestingRetractSink()
     tEnv.sqlQuery(sql).toRetractStream[Row].addSink(sink)
     env.execute()
 
-    val expected = List("1,1,b,b", "2,3,b,d")
+    val expected = List("1,1,b,b,ff,ff", "2,3,b,d,f,h")
     assertThat(sink.getRetractResults.sorted).isEqualTo(expected.sorted)
   }