diff --git a/test/default/kdf.c b/test/default/kdf.c
index 0c9c7122..f10f034e 100644
--- a/test/default/kdf.c
+++ b/test/default/kdf.c
@@ -15,7 +15,7 @@ tv_kdf(void)
     context = (char *) sodium_malloc(crypto_kdf_CONTEXTBYTES);
     master_key = (unsigned char *) sodium_malloc(crypto_kdf_KEYBYTES);
 
-    memcpy(context, "KDF test", strlen("KDF test"));
+    memcpy(context, "KDF test", sizeof "KDF test" -1U);
     for (i = 0; i < crypto_kdf_KEYBYTES; i++) {
         master_key[i] = i;
     }
diff --git a/test/default/sign.c b/test/default/sign.c
index 7f25f531..30a2882b 100644
--- a/test/default/sign.c
+++ b/test/default/sign.c
@@ -1259,7 +1259,7 @@ int main(void)
     }
     sodium_hex2bin(sk, crypto_sign_SECRETKEYBYTES,
                    "833fe62409237b9d62ec77587520911e9a759cec1d19755b7da901b96dca3d42",
-                   2 * crypto_sign_SECRETKEYBYTES , NULL, NULL, NULL);
+                   2 * crypto_sign_SECRETKEYBYTES / 2, NULL, NULL, NULL);
     sodium_hex2bin(pk, crypto_sign_PUBLICKEYBYTES,
                    "ec172b93ad5e563bf4932c70e1245034c35467ef2efd4d64ebf819683467e2bf",
                    2 * crypto_sign_PUBLICKEYBYTES, NULL, NULL, NULL);