diff --git a/src/ciphers/camellia.c b/src/ciphers/camellia.c
index 0651012..e7b172f 100644
--- a/src/ciphers/camellia.c
+++ b/src/ciphers/camellia.c
@@ -686,6 +686,21 @@ int camellia_test(void)
       }
       camellia_done(&skey);
       if (XMEMCMP(tests[x].ct, buf[0], 16) || XMEMCMP(tests[x].pt, buf[1], 16)) {
+#if 0
+         int i, j;
+         printf ("\n\nLTC_CAMELLIA failed for x=%d, I got:\n", x);
+         for (i = 0; i < 2; i++) {
+            const unsigned char *expected, *actual;
+            expected = (i ? tests[x].pt : tests[x].ct);
+            actual = buf[i];
+            printf ("expected    actual   (%s)\n", (i ? "plaintext" : "ciphertext"));
+            for (j = 0; j < 16; j++) {
+               const char *eq = (expected[j] == actual[j] ? "==" : "!=");
+               printf ("     %02x  %s  %02x\n", expected[j], eq, actual[j]);
+            }
+            printf ("\n");
+         }
+#endif
          return CRYPT_FAIL_TESTVECTOR;
       }
    }
diff --git a/src/ciphers/kseed.c b/src/ciphers/kseed.c
index a163c95..1065d8c 100644
--- a/src/ciphers/kseed.c
+++ b/src/ciphers/kseed.c
@@ -346,6 +346,21 @@ int kseed_test(void)
        kseed_ecb_encrypt(tests[x].pt, buf[0], &skey);
        kseed_ecb_decrypt(buf[0], buf[1], &skey);
        if (XMEMCMP(buf[0], tests[x].ct, 16) || XMEMCMP(buf[1], tests[x].pt, 16)) {
+#if 0
+          int i, j;
+          printf ("\n\nLTC_KSEED failed for x=%d, I got:\n", x);
+          for (i = 0; i < 2; i++) {
+             const unsigned char *expected, *actual;
+             expected = (i ? tests[x].pt : tests[x].ct);
+             actual = buf[i];
+             printf ("expected    actual   (%s)\n", (i ? "plaintext" : "ciphertext"));
+             for (j = 0; j < 16; j++) {
+                const char *eq = (expected[j] == actual[j] ? "==" : "!=");
+                printf ("     %02x  %s  %02x\n", expected[j], eq, actual[j]);
+             }
+             printf ("\n");
+          }
+#endif
           return CRYPT_FAIL_TESTVECTOR;
        }
    }