diff --git a/tests/suites/test_suite_ssl.function b/tests/suites/test_suite_ssl.function
index 05571a1dc8..050e525a21 100644
--- a/tests/suites/test_suite_ssl.function
+++ b/tests/suites/test_suite_ssl.function
@@ -1121,6 +1121,8 @@ void ssl_dtls_replay(data_t *prevs, data_t *new, int ret)
     mbedtls_ssl_config_init(&conf);
     MD_OR_USE_PSA_INIT();
 
+    mbedtls_ssl_conf_rng(&conf, rng_get, NULL);
+
     TEST_ASSERT(mbedtls_ssl_config_defaults(&conf,
                                             MBEDTLS_SSL_IS_CLIENT,
                                             MBEDTLS_SSL_TRANSPORT_DATAGRAM,
@@ -2892,6 +2894,7 @@ void conf_version(int endpoint, int transport,
     mbedtls_ssl_conf_transport(&conf, transport);
     mbedtls_ssl_conf_min_tls_version(&conf, min_tls_version);
     mbedtls_ssl_conf_max_tls_version(&conf, max_tls_version);
+    mbedtls_ssl_conf_rng(&conf, rng_get, NULL);
 
     TEST_ASSERT(mbedtls_ssl_setup(&ssl, &conf) == expected_ssl_setup_result);
     TEST_EQUAL(mbedtls_ssl_conf_get_endpoint(
@@ -2933,6 +2936,8 @@ void conf_curve()
     mbedtls_ssl_init(&ssl);
     MD_OR_USE_PSA_INIT();
 
+    mbedtls_ssl_conf_rng(&conf, rng_get, NULL);
+
     TEST_ASSERT(mbedtls_ssl_setup(&ssl, &conf) == 0);
 
     TEST_ASSERT(ssl.handshake != NULL && ssl.handshake->group_list != NULL);
@@ -2964,6 +2969,7 @@ void conf_group()
     mbedtls_ssl_config conf;
     mbedtls_ssl_config_init(&conf);
 
+    mbedtls_ssl_conf_rng(&conf, rng_get, NULL);
     mbedtls_ssl_conf_max_tls_version(&conf, MBEDTLS_SSL_VERSION_TLS1_2);
     mbedtls_ssl_conf_min_tls_version(&conf, MBEDTLS_SSL_VERSION_TLS1_2);
 
@@ -3069,6 +3075,8 @@ void cookie_parsing(data_t *cookie, int exp_ret)
     mbedtls_ssl_config_init(&conf);
     USE_PSA_INIT();
 
+    mbedtls_ssl_conf_rng(&conf, rng_get, NULL);
+
     TEST_EQUAL(mbedtls_ssl_config_defaults(&conf, MBEDTLS_SSL_IS_SERVER,
                                            MBEDTLS_SSL_TRANSPORT_DATAGRAM,
                                            MBEDTLS_SSL_PRESET_DEFAULT),
@@ -3122,6 +3130,8 @@ void cid_sanity()
     mbedtls_ssl_config_init(&conf);
     MD_OR_USE_PSA_INIT();
 
+    mbedtls_ssl_conf_rng(&conf, rng_get, NULL);
+
     TEST_ASSERT(mbedtls_ssl_config_defaults(&conf,
                                             MBEDTLS_SSL_IS_CLIENT,
                                             MBEDTLS_SSL_TRANSPORT_STREAM,
@@ -3380,6 +3390,8 @@ void ssl_ecjpake_set_password(int use_opaque_arg)
 
     mbedtls_ssl_config_init(&conf);
 
+    mbedtls_ssl_conf_rng(&conf, rng_get, NULL);
+
     TEST_EQUAL(mbedtls_ssl_config_defaults(&conf,
                                            MBEDTLS_SSL_IS_CLIENT,
                                            MBEDTLS_SSL_TRANSPORT_STREAM,