Spring boot profiles and @Value

Not sure what I'm doing wrong here, but I have the following value that points to the URL of a micro service.

@Value("${url.dispenseRoot}")
private String dispenseRoot;

And I am setting up my dev profile in my application.yml file such:

---
spring:
  datasource:
    url: jdbc:h2:mem:test
    username: sa
    password: sa
    driverClassName: org.h2.Driver
  config:
    activate:
      on-profile: dev

mpesa:
  host: sandbox.safaricom.co.ke
  port: 443

url:
  dispenseRoot: https://localhost:8844/dispense
---

Then, in accordance with my answer here: How do I activate a Spring Boot profile when running from IntelliJ?, I set up the spring boot profile on the run configuration as such:

And then run the following test to test my configuration:

@SpringBootTest
public class PaymentApplicationTests {

    @Test
    public void contextLoads() {
    }

}

And I get:

    ... 111 more
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'url.dispenseRoot' in value "${url.dispenseRoot}"

Now, if I copy and paste the following lines:

url:
  dispenseRoot: https://localhost:8844/dispense

Above my profile where I'm setting up the general settings that are true for everything, it works fine. Therefore, I'm certain it has something to do with profiles, but I can't figure out what it is.

Please advise...