diff --git a/src/test/kotlin/roomescape/reservation/web/ReservationControllerTest.kt b/src/test/kotlin/roomescape/reservation/web/ReservationControllerTest.kt
index a5fdf245..06d59c98 100644
--- a/src/test/kotlin/roomescape/reservation/web/ReservationControllerTest.kt
+++ b/src/test/kotlin/roomescape/reservation/web/ReservationControllerTest.kt
@@ -465,7 +465,7 @@ class ReservationControllerTest(
                     post("/reservations/waiting")
                 }.Then {
                     statusCode(201)
-                    body("data.member.id", equalTo(member.id!!))
+                    body("data.member.id", equalTo(member.id!!.toString()))
                     body("data.status", equalTo(ReservationStatus.WAITING.name))
                 }
             }