diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index b0d94bde0..4762285b0 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -9894,7 +9894,7 @@ run_test    "DTLS fragmenting: proxy MTU, ChachaPoly renego" \
              crt_file=data_files/server8_int-ca2.crt \
              key_file=data_files/server8.key \
              exchanges=2 renegotiation=1 renegotiate=1 \
-             force_ciphersuite=TLS-ECDHE-ECDSA-WITH-AES-128-GCM-SHA256 \
+             force_ciphersuite=TLS-ECDHE-ECDSA-WITH-CHACHA20-POLY1305-SHA256 \
              hs_timeout=10000-60000 \
              mtu=512" \
             0 \