diff --git a/integration-tests/jpa-oracle/src/main/java/io/quarkus/example/jpaoracle/SerializationTestEndpoint.java b/integration-tests/jpa-oracle/src/main/java/io/quarkus/example/jpaoracle/SerializationTestEndpoint.java
index ff7132a9c93c5..4f2198680a28b 100644
--- a/integration-tests/jpa-oracle/src/main/java/io/quarkus/example/jpaoracle/SerializationTestEndpoint.java
+++ b/integration-tests/jpa-oracle/src/main/java/io/quarkus/example/jpaoracle/SerializationTestEndpoint.java
@@ -11,8 +11,11 @@
 import jakarta.ws.rs.Produces;
 import jakarta.ws.rs.core.MediaType;
 
+import io.quarkus.runtime.annotations.RegisterForReflection;
+
 @Path("/jpa-oracle/testserialization")
 @Produces(MediaType.TEXT_PLAIN)
+@RegisterForReflection(targets = { String.class }, serialization = true)
 public class SerializationTestEndpoint {
 
     @GET