diff --git a/tests.go b/tests.go
index 1870a8e..4053e53 100644
--- a/tests.go
+++ b/tests.go
@@ -28,7 +28,7 @@ type Test struct {
 	Port int `json:"Port" querystring:"Port"`
 
 	// Contact group ID - will return int of contact group used else 0
-	ContactID int `json:"ContactID"`
+	ContactID int `json:"ContactID" querystring:"ContactGroup"`
 
 	// Current status at last test
 	Status string `json:"Status"`