diff --git a/test/default/ed25519_convert.c b/test/default/ed25519_convert.c
index da0f2666..9266619f 100644
--- a/test/default/ed25519_convert.c
+++ b/test/default/ed25519_convert.c
@@ -14,8 +14,7 @@ static const unsigned char keypair_seed[crypto_sign_ed25519_SEEDBYTES] = {
 int main(void)
 {
     unsigned char      ed25519_pk[crypto_sign_ed25519_PUBLICKEYBYTES];
-    unsigned char      ed25519_skpk[crypto_sign_ed25519_SECRETKEYBYTES +
-                                    crypto_sign_ed25519_PUBLICKEYBYTES];
+    unsigned char      ed25519_skpk[crypto_sign_ed25519_SECRETKEYBYTES];
     unsigned char      curve25519_pk[crypto_scalarmult_curve25519_BYTES];
     unsigned char      curve25519_pk2[crypto_scalarmult_curve25519_BYTES];
     unsigned char      curve25519_sk[crypto_scalarmult_curve25519_BYTES];
diff --git a/test/default/sign.c b/test/default/sign.c
index 2cf108a9..ac4ba23e 100644
--- a/test/default/sign.c
+++ b/test/default/sign.c
@@ -1055,8 +1055,7 @@ int main(void)
     unsigned char      sig[crypto_sign_BYTES];
     unsigned char      sm[1024 + crypto_sign_BYTES];
     unsigned char      m[1024];
-    unsigned char      skpk[crypto_sign_SECRETKEYBYTES +
-                            crypto_sign_PUBLICKEYBYTES];
+    unsigned char      skpk[crypto_sign_SECRETKEYBYTES];
     unsigned char      pk[crypto_sign_PUBLICKEYBYTES];
     unsigned char      sk[crypto_sign_SECRETKEYBYTES];
     char               pk_hex[crypto_sign_PUBLICKEYBYTES * 2 + 1];