diff --git a/tests/suites/test_suite_ssl.function b/tests/suites/test_suite_ssl.function
index 73f62c39a..20f84e73c 100644
--- a/tests/suites/test_suite_ssl.function
+++ b/tests/suites/test_suite_ssl.function
@@ -807,9 +807,9 @@ int mbedtls_endpoint_certificate_init( mbedtls_endpoint *ep, int pk_alg )
     }
 
     cert = &( ep->cert );
-    ASSERT_ALLOC( cert->ca_cert, sizeof(mbedtls_x509_crt) );
-    ASSERT_ALLOC( cert->cert, sizeof(mbedtls_x509_crt) );
-    ASSERT_ALLOC( cert->pkey, sizeof(mbedtls_pk_context) );
+    ASSERT_ALLOC( cert->ca_cert, 1 );
+    ASSERT_ALLOC( cert->cert, 1 );
+    ASSERT_ALLOC( cert->pkey, 1 );
 
     mbedtls_x509_crt_init( cert->ca_cert );
     mbedtls_x509_crt_init( cert->cert );