Test parameter validation for pk, pkparse and pkwrite
diff --git a/tests/suites/test_suite_pk.data b/tests/suites/test_suite_pk.data
index 478cde7..d029b99 100644
--- a/tests/suites/test_suite_pk.data
+++ b/tests/suites/test_suite_pk.data
@@ -1,3 +1,6 @@
+PK invalid parameters
+invalid_parameters:
+
 PK utils: RSA
 depends_on:MBEDTLS_RSA_C:MBEDTLS_GENPRIME
 pk_utils:MBEDTLS_PK_RSA:512:64:"RSA"