Fix typo in config symbol

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index 419001a..6d6baf4 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -2914,7 +2914,7 @@
             -c "adding FALLBACK_SCSV" \
             -c "is a fatal alert message (msg 86)"
 
-requires_config_enabled MBEDTLS_SSL_PROTO_TLS_1_1
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_1
 requires_openssl_with_fallback_scsv
 run_test    "Fallback SCSV: disabled, openssl client" \
             "$P_SRV debug_level=2" \
@@ -2923,7 +2923,7 @@
             -S "received FALLBACK_SCSV" \
             -S "inapropriate fallback"
 
-requires_config_enabled MBEDTLS_SSL_PROTO_TLS_1_1
+requires_config_enabled MBEDTLS_SSL_PROTO_TLS1_1
 requires_openssl_with_fallback_scsv
 run_test    "Fallback SCSV: enabled, openssl client" \
             "$P_SRV debug_level=2" \