diff --git a/examples/integrations/micronaut/data/src/main/java/io/helidon/examples/integrations/micronaut/data/BeanValidationExceptionMapper.java b/examples/integrations/micronaut/data/src/main/java/io/helidon/examples/integrations/micronaut/data/BeanValidationExceptionMapper.java
index 8407cb1c914..ca2f919979a 100644
--- a/examples/integrations/micronaut/data/src/main/java/io/helidon/examples/integrations/micronaut/data/BeanValidationExceptionMapper.java
+++ b/examples/integrations/micronaut/data/src/main/java/io/helidon/examples/integrations/micronaut/data/BeanValidationExceptionMapper.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, 2021 Oracle and/or its affiliates.
+ * Copyright (c) 2020, 2023 Oracle and/or its affiliates.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,8 @@
 
 package io.helidon.examples.integrations.micronaut.data;
 
-import jakarta.validation.ConstraintViolationException;
+import javax.validation.ConstraintViolationException;
+
 import jakarta.ws.rs.core.Response;
 import jakarta.ws.rs.ext.ExceptionMapper;
 import jakarta.ws.rs.ext.Provider;
diff --git a/examples/integrations/micronaut/data/src/main/java/io/helidon/examples/integrations/micronaut/data/PetResource.java b/examples/integrations/micronaut/data/src/main/java/io/helidon/examples/integrations/micronaut/data/PetResource.java
index 6bd15892796..87bc2391b4a 100644
--- a/examples/integrations/micronaut/data/src/main/java/io/helidon/examples/integrations/micronaut/data/PetResource.java
+++ b/examples/integrations/micronaut/data/src/main/java/io/helidon/examples/integrations/micronaut/data/PetResource.java
@@ -16,10 +16,11 @@
 
 package io.helidon.examples.integrations.micronaut.data;
 
+import javax.validation.constraints.Pattern;
+
 import io.helidon.examples.integrations.micronaut.data.model.Pet;
 
 import jakarta.inject.Inject;
-import jakarta.validation.constraints.Pattern;
 import jakarta.ws.rs.GET;
 import jakarta.ws.rs.NotFoundException;
 import jakarta.ws.rs.Path;
diff --git a/examples/integrations/micronaut/data/src/test/java/io/helidon/examples/integrations/micronaut/data/MicronautExampleTest.java b/examples/integrations/micronaut/data/src/test/java/io/helidon/examples/integrations/micronaut/data/MicronautExampleTest.java
index a20730e23e4..40681eae743 100644
--- a/examples/integrations/micronaut/data/src/test/java/io/helidon/examples/integrations/micronaut/data/MicronautExampleTest.java
+++ b/examples/integrations/micronaut/data/src/test/java/io/helidon/examples/integrations/micronaut/data/MicronautExampleTest.java
@@ -24,16 +24,12 @@
 import jakarta.json.JsonObject;
 import jakarta.ws.rs.client.WebTarget;
 import jakarta.ws.rs.core.Response;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
 
 @HelidonTest
-@Disabled("3.0.0-JAKARTA") // Micronaut - validation Error instantiating bean of type
-// [io.helidon.examples.integrations.micronaut.data.DbPopulateData$ApplicationEventListener$init1$Intercepted]:
-// Error loading bean [io.micronaut.validation.ValidatingInterceptor]: javax/validation/Validator
 class MicronautExampleTest {
     @Inject
     private WebTarget webTarget;
diff --git a/examples/microprofile/cors/pom.xml b/examples/microprofile/cors/pom.xml
index d9321957b61..6cb55571a0b 100644
--- a/examples/microprofile/cors/pom.xml
+++ b/examples/microprofile/cors/pom.xml
@@ -70,6 +70,11 @@
             <artifactId>helidon-webclient</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>io.helidon.http.media</groupId>
+            <artifactId>helidon-http-media-jsonb</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/examples/microprofile/cors/src/main/java/io/helidon/microprofile/examples/cors/GreetResource.java b/examples/microprofile/cors/src/main/java/io/helidon/microprofile/examples/cors/GreetResource.java
index 7a8b4bb2dae..3975512f249 100644
--- a/examples/microprofile/cors/src/main/java/io/helidon/microprofile/examples/cors/GreetResource.java
+++ b/examples/microprofile/cors/src/main/java/io/helidon/microprofile/examples/cors/GreetResource.java
@@ -94,10 +94,10 @@ public GreetingMessage getMessage(@PathParam("name") String name) {
     @PUT
     @Consumes(MediaType.APPLICATION_JSON)
     @Produces(MediaType.APPLICATION_JSON)
-    @RequestBody(name = "greeting",
+    @RequestBody(name = "message",
             required = true,
             content = @Content(mediaType = "application/json",
-                    schema = @Schema(type = SchemaType.OBJECT, requiredProperties = { "greeting" })))
+                    schema = @Schema(type = SchemaType.OBJECT, requiredProperties = { "message" })))
     @APIResponses({
             @APIResponse(name = "normal", responseCode = "204", description = "Greeting updated"),
             @APIResponse(name = "missing 'greeting'", responseCode = "400",
diff --git a/examples/microprofile/cors/src/test/java/io/helidon/microprofile/examples/cors/TestCORS.java b/examples/microprofile/cors/src/test/java/io/helidon/microprofile/examples/cors/TestCORS.java
index 3a2d3e3ec04..2673f5b4539 100644
--- a/examples/microprofile/cors/src/test/java/io/helidon/microprofile/examples/cors/TestCORS.java
+++ b/examples/microprofile/cors/src/test/java/io/helidon/microprofile/examples/cors/TestCORS.java
@@ -23,6 +23,7 @@
 import io.helidon.http.HeaderNames;
 import io.helidon.http.Headers;
 import io.helidon.http.Method;
+import io.helidon.http.media.jsonb.JsonbSupport;
 import io.helidon.microprofile.server.Server;
 import io.helidon.webclient.http1.Http1Client;
 import io.helidon.webclient.http1.Http1ClientRequest;
@@ -46,8 +47,6 @@
 import static org.hamcrest.Matchers.not;
 
 @TestMethodOrder(MethodOrderer.OrderAnnotation.class)
-@Disabled("3.0.0-JAKARTA") // OpenAPI: Caused by: java.lang.NoSuchMethodError:
-// 'java.util.List io.smallrye.jandex.ClassInfo.unsortedFields()'
 public class TestCORS {
 
     private static Http1Client client;
@@ -55,7 +54,8 @@ public class TestCORS {
 
     @BeforeAll
     static void init() {
-        Config serverConfig = Config.create().get("server");
+        Config config = Config.create();
+        Config serverConfig = config.get("server");
         Server.Builder serverBuilder = Server.builder();
         serverConfig.ifExists(serverBuilder::config);
         server = serverBuilder
@@ -64,6 +64,7 @@ static void init() {
                 .start();
         client = Http1Client.builder()
                 .baseUri("http://localhost:" + server.port())
+                .addMediaSupport(JsonbSupport.create(config))
                 .build();
     }
 
@@ -184,7 +185,7 @@ void testNamedGreetWithCors() {
     @Test
     void testGreetingChangeWithCorsAndOtherOrigin() {
         Http1ClientRequest req = client.put()
-                .header(HeaderNames.ORIGIN, "http://foo.com")
+                .header(HeaderNames.ORIGIN, "http://other.com")
                 .header(HeaderNames.HOST, "here.com");
 
         try (Http1ClientResponse r = putResponse("/greet/greeting", "Ahoy", req)) {
@@ -213,7 +214,7 @@ private static String fromPayload(Http1ClientResponse response) {
     }
 
     private static GreetingMessage toPayload(String message) {
-        return  new GreetingMessage(message);
+        return new GreetingMessage(message);
     }
 
     private static Http1ClientResponse putResponse(String path, String message) {