diff --git a/tests/src/test_helpers/ssl_helpers.c b/tests/src/test_helpers/ssl_helpers.c
index 5c305cb..a55d067 100644
--- a/tests/src/test_helpers/ssl_helpers.c
+++ b/tests/src/test_helpers/ssl_helpers.c
@@ -1638,6 +1638,10 @@
     session->resumption_key_len = 32;
     memset(session->resumption_key, 0x99, sizeof(session->resumption_key));
 
+#if defined(MBEDTLS_SSL_EARLY_DATA)
+    session->max_early_data_size = 0x87654321;
+#endif
+
 #if defined(MBEDTLS_HAVE_TIME)
     if (session->endpoint == MBEDTLS_SSL_IS_SERVER) {
         session->start = mbedtls_time(NULL) - 42;