diff --git a/tests/suites/test_suite_psa_crypto.function b/tests/suites/test_suite_psa_crypto.function
index c5a8cde..12d7a89 100644
--- a/tests/suites/test_suite_psa_crypto.function
+++ b/tests/suites/test_suite_psa_crypto.function
@@ -780,6 +780,14 @@
                 expected_status = PSA_ERROR_DATA_INVALID;
             }
 
+            /*
+             * When injecting errors in inputs, the implementation is
+             * free to detect it right away of with a delay.
+             * This permits delaying the error until the end of the input
+             * sequence, if no error appears then, this will be treated
+             * as an error.
+             */
+
             if( client_input_first == 1 )
             {
                 /* Client first round Input */