diff --git a/src/test.cpp b/src/test.cpp
index 0195308..45f9a7c 100644
--- a/src/test.cpp
+++ b/src/test.cpp
@@ -905,8 +905,8 @@ TEST_CASE("bench1") {
   ankerl::nanobench::Bench bench;
   bench.batch(json.size());
   bench.unit("byte");
-  auto copy = json;
   bench.run("parser1", [&]() {
+    auto copy = json;
     Parser1 parser(copy.data(), copy.length(), &c, nullptr);
     bench.doNotOptimizeAway(parser.parse());
   });
@@ -917,8 +917,8 @@ TEST_CASE("bench2") {
   ankerl::nanobench::Bench bench;
   bench.batch(json.size());
   bench.unit("byte");
-  auto copy = json;
   bench.run("parser2", [&]() {
+    auto copy = json;
     Parser2 parser(copy.data(), copy.length(), &c, nullptr);
     bench.doNotOptimizeAway(parser.parse());
   });
@@ -929,8 +929,8 @@ TEST_CASE("bench3") {
   ankerl::nanobench::Bench bench;
   bench.batch(json.size());
   bench.unit("byte");
-  simdjson::padded_string my_padded_data(json.data(), json.size());
   bench.run("parser3", [&]() {
+    simdjson::padded_string my_padded_data(json.data(), json.size());
     simdjson::dom::parser parser;
     auto doc = parser.parse(my_padded_data);
     bench.doNotOptimizeAway(doc);
@@ -942,8 +942,8 @@ TEST_CASE("bench4") {
   ankerl::nanobench::Bench bench;
   bench.batch(json.size());
   bench.unit("byte");
-  padded_string my_padded_data(json.data(), json.size());
   bench.run("parser4", [&]() {
+    padded_string my_padded_data(json.data(), json.size());
     ondemand::parser parser;
     auto doc = parser.iterate(my_padded_data);
     bench.doNotOptimizeAway(doc);