diff --git a/tests/test.c b/tests/test.c
index 990404c..b811758 100644
--- a/tests/test.c
+++ b/tests/test.c
@@ -392,7 +392,7 @@ int main(int argc, char **argv)
          nop++;
       }
       else {
-         printf("failed %10.3fms", (double)(delta)/1000);
+         printf("failed (%s) %10.3fms", error_to_string(x), (double)(delta)/1000);
          fail++;
       }
    }
diff --git a/tests/tomcrypt_test.h b/tests/tomcrypt_test.h
index c2e4646..af5a0af 100644
--- a/tests/tomcrypt_test.h
+++ b/tests/tomcrypt_test.h
@@ -29,7 +29,7 @@
  * this and so it's treated as an error and you have to comment out the
  * following statement :)
  */
-#error EXT_MATH_LIB is required to be defined
+#error One of USE_LTM, USE_TFM, USE_GMP and EXT_MATH_LIB is required to be defined
 #endif
 #endif