test: custom enum type deserializer fails at root level

src/test/java/org/eclipse/yasson/serializers/TypeDeserializerOnContainersTest.java

diff --git a/src/test/java/org/eclipse/yasson/serializers/TypeDeserializerOnContainersTest.java b/src/test/java/org/eclipse/yasson/serializers/TypeDeserializerOnContainersTest.java
index 929ec7c..bfee90b 100644
--- a/src/test/java/org/eclipse/yasson/serializers/TypeDeserializerOnContainersTest.java
+++ b/src/test/java/org/eclipse/yasson/serializers/TypeDeserializerOnContainersTest.java
@@ -284,4 +284,16 @@
         Assertions.assertTrue(result.optional.isPresent(), "Expected value to be present, but the optional was empty.");
         Assertions.assertEquals(TestEnum.VALUE1, result.optional.get());
     }
+
+    @Test
+    public void testTypeDeserializerOnEnumAtRootLevel() {
+        final TestEnum result = jsonb.fromJson("2", TestEnum.class);
+        Assertions.assertEquals(TestEnum.VALUE2, result);
+    }
+
+    @Test
+    public void testTypeDeserializerOnInterfaceAtRootLevel() {
+        final TestInterface result = jsonb.fromJson("{\"value\":\"value1\"}", TestInterface.class);
+        Assertions.assertEquals("DESERIALIZED:value1", result.getValue());
+    }
 }

src/test/java/org/eclipse/yasson/serializers/TypeSerializerOnContainersTest.java

diff --git a/src/test/java/org/eclipse/yasson/serializers/TypeSerializerOnContainersTest.java b/src/test/java/org/eclipse/yasson/serializers/TypeSerializerOnContainersTest.java
index 00b8285..37bd329 100644
--- a/src/test/java/org/eclipse/yasson/serializers/TypeSerializerOnContainersTest.java
+++ b/src/test/java/org/eclipse/yasson/serializers/TypeSerializerOnContainersTest.java
@@ -272,6 +272,18 @@
         Assertions.assertEquals(1, json.getInt("optional"));
     }
 
+    @Test
+    public void testTypeSerializerOnEnumAtRootLevel() {
+        final String json = jsonb.toJson(TestEnum.VALUE1);
+        Assertions.assertEquals("1", json);
+    }
+
+    @Test
+    public void testTypeSerializerOnInterfaceAtRootLevel() {
+        final String json = jsonb.toJson(new TestImpl("value1"), TestInterface.class);
+        Assertions.assertEquals("\"SERIALIZED:value1\"", json);
+    }
+
     private JsonObject toJsonObject(final Object object) throws JsonbException {
         final String value = jsonb.toJson(object);
         try (