1 files changed, 1 insertions, 0 deletions

diff --git a/src/util/test_crypto_hkdf.c b/src/util/test_crypto_hkdf.c
index 1cbe41b4a..3a00ce679 100644
--- a/src/util/test_crypto_hkdf.c
+++ b/src/util/test_crypto_hkdf.c
@@ -23,6 +23,7 @@
 /**
  * @file src/util/test_crypt_hkdf.c
  * @brief Testcases for HKDF
+ * @todo: test for out_len < hash_len
  * @author Nils Durner
  */