diff --git a/tests/suites/test_suite_debug.function b/tests/suites/test_suite_debug.function
index c96e305d4f..fca7ea0615 100644
--- a/tests/suites/test_suite_debug.function
+++ b/tests/suites/test_suite_debug.function
@@ -68,10 +68,11 @@ void debug_print_msg_threshold(int threshold, int level, char *file,
 
     mbedtls_ssl_conf_rng(&conf, rng_get, NULL);
 
-    mbedtls_ssl_config_defaults(&conf,
-                                MBEDTLS_SSL_IS_CLIENT,
-                                MBEDTLS_SSL_TRANSPORT_STREAM,
-                                MBEDTLS_SSL_PRESET_DEFAULT);
+    TEST_EQUAL(mbedtls_ssl_config_defaults(&conf,
+                                           MBEDTLS_SSL_IS_CLIENT,
+                                           MBEDTLS_SSL_TRANSPORT_STREAM,
+                                           MBEDTLS_SSL_PRESET_DEFAULT),
+               0);
 
     mbedtls_ssl_conf_dbg(&conf, string_debug, &buffer);
 
@@ -108,10 +109,11 @@ void mbedtls_debug_print_ret(char *file, int line, char *text, int value,
 
     mbedtls_ssl_conf_rng(&conf, rng_get, NULL);
 
-    mbedtls_ssl_config_defaults(&conf,
-                                MBEDTLS_SSL_IS_CLIENT,
-                                MBEDTLS_SSL_TRANSPORT_STREAM,
-                                MBEDTLS_SSL_PRESET_DEFAULT);
+    TEST_EQUAL(mbedtls_ssl_config_defaults(&conf,
+                                           MBEDTLS_SSL_IS_CLIENT,
+                                           MBEDTLS_SSL_TRANSPORT_STREAM,
+                                           MBEDTLS_SSL_PRESET_DEFAULT),
+               0);
 
     mbedtls_ssl_conf_dbg(&conf, string_debug, &buffer);
 
@@ -145,10 +147,11 @@ void mbedtls_debug_print_buf(char *file, int line, char *text,
 
     mbedtls_ssl_conf_rng(&conf, rng_get, NULL);
 
-    mbedtls_ssl_config_defaults(&conf,
-                                MBEDTLS_SSL_IS_CLIENT,
-                                MBEDTLS_SSL_TRANSPORT_STREAM,
-                                MBEDTLS_SSL_PRESET_DEFAULT);
+    TEST_EQUAL(mbedtls_ssl_config_defaults(&conf,
+                                           MBEDTLS_SSL_IS_CLIENT,
+                                           MBEDTLS_SSL_TRANSPORT_STREAM,
+                                           MBEDTLS_SSL_PRESET_DEFAULT),
+               0);
 
     mbedtls_ssl_conf_dbg(&conf, string_debug, &buffer);
 
@@ -184,10 +187,11 @@ void mbedtls_debug_print_crt(char *crt_file, char *file, int line,
 
     mbedtls_ssl_conf_rng(&conf, rng_get, NULL);
 
-    mbedtls_ssl_config_defaults(&conf,
-                                MBEDTLS_SSL_IS_CLIENT,
-                                MBEDTLS_SSL_TRANSPORT_STREAM,
-                                MBEDTLS_SSL_PRESET_DEFAULT);
+    TEST_EQUAL(mbedtls_ssl_config_defaults(&conf,
+                                           MBEDTLS_SSL_IS_CLIENT,
+                                           MBEDTLS_SSL_TRANSPORT_STREAM,
+                                           MBEDTLS_SSL_PRESET_DEFAULT),
+               0);
 
     mbedtls_ssl_conf_dbg(&conf, string_debug, &buffer);
 
@@ -225,10 +229,11 @@ void mbedtls_debug_print_mpi(char *value, char *file, int line,
 
     mbedtls_ssl_conf_rng(&conf, rng_get, NULL);
 
-    mbedtls_ssl_config_defaults(&conf,
-                                MBEDTLS_SSL_IS_CLIENT,
-                                MBEDTLS_SSL_TRANSPORT_STREAM,
-                                MBEDTLS_SSL_PRESET_DEFAULT);
+    TEST_EQUAL(mbedtls_ssl_config_defaults(&conf,
+                                           MBEDTLS_SSL_IS_CLIENT,
+                                           MBEDTLS_SSL_TRANSPORT_STREAM,
+                                           MBEDTLS_SSL_PRESET_DEFAULT),
+               0);
 
     mbedtls_ssl_conf_dbg(&conf, string_debug, &buffer);