diff --git a/tests/suites/test_suite_psa_crypto_op_fail.function b/tests/suites/test_suite_psa_crypto_op_fail.function
index 20942bf81f..9878237211 100644
--- a/tests/suites/test_suite_psa_crypto_op_fail.function
+++ b/tests/suites/test_suite_psa_crypto_op_fail.function
@@ -359,9 +359,9 @@ void key_agreement_fail(int key_type_arg, data_t *key_data,
     psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
     mbedtls_svc_key_id_t key_id = MBEDTLS_SVC_KEY_ID_INIT;
     uint8_t public_key[PSA_EXPORT_PUBLIC_KEY_MAX_SIZE] = { 0 };
-    size_t public_key_length = SIZE_MAX;
+    size_t public_key_length = 0;
     uint8_t output[PSA_RAW_KEY_AGREEMENT_OUTPUT_MAX_SIZE] = { 0 };
-    size_t length = SIZE_MAX;
+    size_t length = 0;
     psa_key_derivation_operation_t operation = PSA_KEY_DERIVATION_OPERATION_INIT;
 
     PSA_INIT();