diff --git a/src/test.cpp b/src/test.cpp
index c642cc5..4127be2 100644
--- a/src/test.cpp
+++ b/src/test.cpp
@@ -173,17 +173,18 @@ struct MinifyState {
     int64_t index;
     bool isObject;
   };
+  std::string result;
   void on_begin_value() {
     if (!stack.empty()) {
       auto &back = stack.back();
       if (back.isObject && back.index % 2 == 0 && back.index > 0) {
-        printf(",");
+        result.append(",");
       }
       if (back.isObject && back.index % 2 == 1 && back.index > 0) {
-        printf(":");
+        result.append(":");
       }
       if (!back.isObject && back.index > 0) {
-        printf(",");
+        result.append(",");
       }
       ++back.index;
     }
@@ -197,57 +198,85 @@ Callbacks minifyCallbacks() {
     auto *state = (MinifyState *)p;
     state->on_begin_value();
     state->stack.push_back({0, true});
-    printf("{");
+    state->result.append("{");
   };
   result.on_end_object = +[](void *p) {
     auto *state = (MinifyState *)p;
     state->stack.pop_back();
-    printf("}");
+    state->result.append("}");
   };
   result.on_begin_string = +[](void *p) {
     auto *state = (MinifyState *)p;
     state->on_begin_value();
-    printf("\"");
+    state->result.append("\"");
+  };
+  result.on_string_data = +[](void *p, const char *buf, int len) {
+    auto *state = (MinifyState *)p;
+    state->result.append(std::string(buf, len));
+  };
+  result.on_end_string = +[](void *p) {
+    auto *state = (MinifyState *)p;
+    state->result.append("\"");
   };
-  result.on_string_data =
-      +[](void *, const char *buf, int len) { printf("%.*s", len, buf); };
-  result.on_end_string = +[](void *p) { printf("\""); };
   result.on_begin_array = +[](void *p) {
     auto *state = (MinifyState *)p;
     state->on_begin_value();
     state->stack.push_back({0, false});
-    printf("[");
+    state->result.append("[");
   };
   result.on_end_array = +[](void *p) {
     auto *state = (MinifyState *)p;
     state->stack.pop_back();
-    printf("]");
+    state->result.append("]");
   };
   result.on_begin_number = +[](void *p) {
     auto *state = (MinifyState *)p;
     state->on_begin_value();
   };
-  result.on_number_data =
-      +[](void *, const char *buf, int len) { printf("%.*s", len, buf); };
+  result.on_number_data = +[](void *p, const char *buf, int len) {
+    auto *state = (MinifyState *)p;
+    state->result.append(std::string(buf, len));
+  };
   result.on_end_number = +[](void *) {};
   result.on_true_literal = +[](void *p) {
     auto *state = (MinifyState *)p;
     state->on_begin_value();
-    printf("true");
+    state->result.append("true");
   };
   result.on_false_literal = +[](void *p) {
     auto *state = (MinifyState *)p;
     state->on_begin_value();
-    printf("false");
+    state->result.append("false");
   };
   result.on_null_literal = +[](void *p) {
     auto *state = (MinifyState *)p;
     state->on_begin_value();
-    printf("null");
+    state->result.append("null");
   };
   return result;
 }
 
+void testStreaming(std::string const &json) {
+  MinifyState streaming;
+  MinifyState batch;
+  auto c = minifyCallbacks();
+  {
+    auto copy = json;
+    parser3::Parser3 parser(&c, &streaming);
+    for (int i = 0; i < copy.size(); ++i) {
+      REQUIRE(parser.parse(copy.data() + i, 1) == parser3::S_AGAIN);
+    }
+    CHECK(parser.parse(nullptr, 0) == parser3::S_OK);
+  }
+  {
+    auto copy = json;
+    parser3::Parser3 parser(&c, &batch);
+    REQUIRE(parser.parse(copy.data(), copy.size()) == parser3::S_AGAIN);
+    CHECK(parser.parse(nullptr, 0) == parser3::S_OK);
+  }
+  CHECK(streaming.result == batch.result);
+}
+
 Callbacks noopCallbacks() {
   Callbacks result;
   result.on_begin_object = +[](void *) {};
@@ -305,6 +334,8 @@ TEST_CASE("parser3") {
   }
 }
 
+TEST_CASE("streaming") { testStreaming(json); }
+
 TEST_CASE("bench3") {
   auto c = noopCallbacks();
   ankerl::nanobench::Bench bench;