}
			jws, err := signer.Sign([]byte(claimToResponseMap[claim]))
			if err != nil {
				t.Errorf("while signing response token: %v", err)
			}
			token, err := jws.CompactSerialize()
			if err != nil {
				t.Errorf("while serializing response token: %v", err)
			}
			w.Write([]byte(token))
		default:
			w.WriteHeader(http.StatusNotFound)
			fmt.Fprintf(w, "unexpected URL: %v", r.URL)