diff --git a/tests/fortran.cpp b/tests/fortran.cpp
index 5b8c95e..79429bd 100644
--- a/tests/fortran.cpp
+++ b/tests/fortran.cpp
@@ -4,15 +4,14 @@
 #include <cstdlib>
 #include <iostream>
 #include <vector>
-
-#define FASTFLOAT_ALLOWS_LEADING_PLUS
-
 #include "fast_float/fast_float.h"
 
 int main_readme() {
   const std::string input = "1d+4";
   double result;
-  fast_float::parse_options options{fast_float::chars_format::fortran};
+  fast_float::parse_options options{
+      fast_float::chars_format::fortran |
+      fast_float::chars_format::allow_leading_plus};
   auto answer = fast_float::from_chars_advanced(
       input.data(), input.data() + input.size(), result, options);
   if ((answer.ec != std::errc()) || ((result != 10000))) {
@@ -32,7 +31,9 @@ int main() {
                                       "1d-1", "1d-2", "1d-3", "1d-4"};
   const std::vector<std::string> fmt3{"+1+4", "+1+3", "+1+2", "+1+1", "+1+0",
                                       "+1-1", "+1-2", "+1-3", "+1-4"};
-  const fast_float::parse_options options{fast_float::chars_format::fortran};
+  const fast_float::parse_options options{
+      fast_float::chars_format::fortran |
+      fast_float::chars_format::allow_leading_plus};
 
   for (auto const &f : fmt1) {
     auto d{std::distance(&fmt1[0], &f)};
diff --git a/tests/json_fmt.cpp b/tests/json_fmt.cpp
index 53b6078..b7bfa91 100644
--- a/tests/json_fmt.cpp
+++ b/tests/json_fmt.cpp
@@ -2,16 +2,14 @@
 #include <cstdlib>
 #include <iostream>
 #include <vector>
-
-// test that this option is ignored
-#define FASTFLOAT_ALLOWS_LEADING_PLUS
-
 #include "fast_float/fast_float.h"
 
 int main_readme() {
   const std::string input = "+.1"; // not valid
   double result;
-  fast_float::parse_options options{fast_float::chars_format::json};
+  fast_float::parse_options options{
+      fast_float::chars_format::json |
+      fast_float::chars_format::allow_leading_plus}; // should be ignored
   auto answer = fast_float::from_chars_advanced(
       input.data(), input.data() + input.size(), result, options);
   if (answer.ec == std::errc()) {
@@ -24,7 +22,9 @@ int main_readme() {
 int main_readme2() {
   const std::string input = "inf"; // not valid in JSON
   double result;
-  fast_float::parse_options options{fast_float::chars_format::json};
+  fast_float::parse_options options{
+      fast_float::chars_format::json |
+      fast_float::chars_format::allow_leading_plus}; // should be ignored
   auto answer = fast_float::from_chars_advanced(
       input.data(), input.data() + input.size(), result, options);
   if (answer.ec == std::errc()) {
@@ -38,7 +38,9 @@ int main_readme3() {
   const std::string input =
       "inf"; // not valid in JSON but we allow it with json_or_infnan
   double result;
-  fast_float::parse_options options{fast_float::chars_format::json_or_infnan};
+  fast_float::parse_options options{
+      fast_float::chars_format::json_or_infnan |
+      fast_float::chars_format::allow_leading_plus}; // should be ignored
   auto answer = fast_float::from_chars_advanced(
       input.data(), input.data() + input.size(), result, options);
   if (answer.ec != std::errc() || (!std::isinf(result))) {
@@ -129,7 +131,9 @@ int main() {
     const auto &expected_reason = reject[i].reason;
     auto answer = fast_float::parse_number_string(
         f.data(), f.data() + f.size(),
-        fast_float::parse_options(fast_float::chars_format::json));
+        fast_float::parse_options(
+            fast_float::chars_format::json |
+            fast_float::chars_format::allow_leading_plus)); // should be ignored
     if (answer.valid) {
       std::cerr << "json parse accepted invalid json " << f << std::endl;
       return EXIT_FAILURE;
diff --git a/tests/rcppfastfloat_test.cpp b/tests/rcppfastfloat_test.cpp
index 2e6985b..f2cad42 100644
--- a/tests/rcppfastfloat_test.cpp
+++ b/tests/rcppfastfloat_test.cpp
@@ -2,8 +2,6 @@
  * See https://github.com/eddelbuettel/rcppfastfloat/issues/4
  */
 
-#define FASTFLOAT_ALLOWS_LEADING_PLUS 1
-#define FASTFLOAT_SKIP_WHITE_SPACE 1 // important !
 #include "fast_float/fast_float.h"
 #include <iostream>
 #include <string>
@@ -61,7 +59,10 @@ bool eddelbuettel() {
     // answer contains a error code and a pointer to the end of the
     // parsed region (on success).
     auto const answer = fast_float::from_chars(
-        input.data(), input.data() + input.size(), result);
+        input.data(), input.data() + input.size(), result,
+        fast_float::chars_format::general |
+            fast_float::chars_format::allow_leading_plus |
+            fast_float::chars_format::skip_white_space);
     if (answer.ec != std::errc()) {
       std::cout << "could not parse" << std::endl;
       if (expected_success) {