diff --git a/scala/src/test/scala/org/apache/fory/serializer/scala/PolymorphicTest.scala b/scala/src/test/scala/org/apache/fory/serializer/scala/PolymorphicTest.scala
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+++ b/scala/src/test/scala/org/apache/fory/serializer/scala/PolymorphicTest.scala
@@ -0,0 +1,68 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.fory.serializer.scala
+
+import org.apache.fory.Fory
+import org.apache.fory.config.Language
+import org.scalatest.matchers.should.Matchers
+import org.scalatest.wordspec.AnyWordSpec
+
+object PolymorphicTest {
+  sealed trait Shape
+  case class Circle(radius: Double) extends Shape
+}
+
+class PolymorphicTest extends AnyWordSpec with Matchers {
+  import PolymorphicTest._
+
+  def fory: Fory = {
+    val fory = Fory.builder()
+      .withLanguage(Language.JAVA)
+      .withRefTracking(true)
+      .withScalaOptimizationEnabled(true)
+      .requireClassRegistration(false)
+      .suppressClassRegistrationWarnings(false).build()
+    ScalaSerializers.registerSerializers(fory)
+    fory
+  }
+
+  "fory scala polymorphic support" should {
+    "serialize/deserialize circle class" in {
+      val c = Circle(5.0)
+      fory.deserialize(fory.serialize(c)) shouldEqual c
+    }
+    "serialize/deserialize circle class (class hint)" in {
+      val c = Circle(5.0)
+      fory.deserialize(fory.serialize(c), classOf[Circle]) shouldEqual c
+    }
+    "serialize/deserialize circle class (shape hint)" in {
+      val c = Circle(5.0)
+      fory.deserialize(fory.serialize(c), classOf[Shape]) shouldEqual c
+    }
+    "serialize/deserialize circle class (Java object format)" in {
+      val c = Circle(5.0)
+      fory.deserializeJavaObject(fory.serializeJavaObject(c), classOf[Circle]) shouldEqual c
+    }
+    "serialize/deserialize circle class (Java object format - shape hint)" ignore {
+      val c = Circle(5.0)
+      fory.deserializeJavaObject(fory.serializeJavaObject(c), classOf[Shape]) shouldEqual c
+    }
+  }
+}