diff --git a/test/default/kdf.c b/test/default/kdf.c
index 8716de08..0c9c7122 100644
--- a/test/default/kdf.c
+++ b/test/default/kdf.c
@@ -13,8 +13,9 @@ tv_kdf(void)
     int            ret;
 
     context = (char *) sodium_malloc(crypto_kdf_CONTEXTBYTES);
-    memcpy(context, "KDF test", strlen("KDF test"));
     master_key = (unsigned char *) sodium_malloc(crypto_kdf_KEYBYTES);
+
+    memcpy(context, "KDF test", strlen("KDF test"));
     for (i = 0; i < crypto_kdf_KEYBYTES; i++) {
         master_key[i] = i;
     }
@@ -41,6 +42,9 @@ tv_kdf(void)
         sodium_free(subkey);
     }
 
+    sodium_free(master_key);
+    sodium_free(context);
+
     assert(strcmp(crypto_kdf_primitive(), crypto_kdf_PRIMITIVE) == 0);
     assert(crypto_kdf_BYTES_MAX > 0);
     assert(crypto_kdf_BYTES_MIN <= crypto_kdf_BYTES_MAX);