diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 0dd40e8..4fda2e4 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -14575,6 +14575,22 @@
             -c "found renegotiation extension" \
             -c "renegotiation requested, but not honored by server"
 
+# Fixing the above mock negative using the new renego_delay parameter
+requires_openssl_3_x
+requires_protocol_version tls12
+requires_certificate_authentication
+requires_config_enabled MBEDTLS_SSL_RENEGOTIATION
+run_test    "Handshake defragmentation mock with server-initiated renegotiation: len=256  renego_delay=32" \
+            "$O_NEXT_SRV -tls1_2 -split_send_frag 256 -legacy_renegotiation -cert $DATA_FILES_PATH/server5.crt -key $DATA_FILES_PATH/server5.key" \
+            "$P_CLI debug_level=3 allow_legacy=1 renegotiation=1 renego_delay=32 request_page=/reneg" \
+            0 \
+            -c "initial handshake fragment: 200, 0..200 of [0-9]\\+" \
+            -c "Prepare: waiting for more handshake fragments 200/[0-9]\\+" \
+            -c "Consume: waiting for more handshake fragments 200/[0-9]\\+" \
+            -c "client hello, adding renegotiation extension" \
+            -c "found renegotiation extension" \
+            -c "=> renegotiate"
+
 # Test heap memory usage after handshake
 requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_2
 requires_config_enabled MBEDTLS_MEMORY_DEBUG