@RunWith(SpringRunner.class)
@SpringBootTest
public class MyTestClass {


    @IfProfileValue(name = "os.name", values = {"Linux"})
    @Test
    public void testMe() {
     // will run only in linux, otherwise
     // won't even try to load an
     // application context
    ....
    }
  }

public class VPNConnectivityProfileValueSource implements ProfileValueSource {

  private String vpnEnabled = "true";
  public VPNConnectivityProfileValueSource () {
     // no spring context is available here
     ClassPathResource resource = new ClassPathResource("vpn-config.properties");

     if (resource.exists()) {
          // read the VPN address,
          //
          //this.testProps = PropertiesLoaderUtils.loadProperties(resource);
          // invoke your utility, check the connectivity, etc.
          this.vpnEnabled = ...
     }

}

  @Override
  public String get(String key) {
    // this is important method,
    if(key.equals("vpn.enabled") {
       return this.vpnEnabled;
    }
    else return System.getProperty(key);
  }
}

@RunWith(SpringRunner.class)
@SpringBootTest
@ProfileValueSourceConfiguration(VPNConnectivityProfileValueSource.class)
@IfProfileValue(name = "vpn.enabled", value = "true")
public class MyTestClass {

   @Test
   public void testMe() {
     ....
   }
}