migrated the following modules using parent-spring-5 to spring 5.1:

spring-mvc-simple
spring-security-mvc-custom
spring-security-mvc-login
spring-security-rest
spring-security-rest-basic-auth
spring-static-resources
spring-thymeleaf

spring-security-rest/src/test/java/org/baeldung/web/FooLiveTest.java

@@ -29,7 +29,7 @@ public class FooLiveTest {
         // }
         // return RestAssured.given().cookie("JSESSIONID", cookie);
         return RestAssured.given()
-            .auth()
+            .auth().preemptive()
             .basic("user", "userPass");
     }