diff --git a/include/ArduinoJson/JsonVariant.hpp b/include/ArduinoJson/JsonVariant.hpp
index 1863c4e7..f4b41a77 100644
--- a/include/ArduinoJson/JsonVariant.hpp
+++ b/include/ArduinoJson/JsonVariant.hpp
@@ -11,17 +11,14 @@
 
 #include "Internals/JsonVariantContent.hpp"
 #include "Internals/JsonVariantType.hpp"
+#include "JsonPrintable.hpp"
 
 namespace ArduinoJson {
 
 class JsonArray;
 class JsonObject;
 
-namespace Internals {
-class JsonWriter;
-}
-
-class JsonVariant {
+class JsonVariant : public JsonPrintable<JsonVariant> {
  public:
   JsonVariant() : _type(Internals::JSON_UNDEFINED) {}
 
diff --git a/test/Printers.cpp b/test/Printers.cpp
index 01e9085e..d45758cc 100644
--- a/test/Printers.cpp
+++ b/test/Printers.cpp
@@ -5,14 +5,31 @@
 // https://github.com/bblanchon/ArduinoJson
 
 #include "Printers.hpp"
+#include <ArduinoJson/JsonArray.hpp>
+
+class StreamPrintAdapter : public Print {
+ public:
+  StreamPrintAdapter(std::ostream& os) : _os(os) {}
+
+  virtual size_t write(uint8_t c) {
+    _os << (char)c;
+    return 1;
+  }
+
+ private:
+  std::ostream& _os;
+};
 
 std::ostream& ArduinoJson::operator<<(std::ostream& os,
                                       const ArduinoJson::JsonVariant& v) {
-  if (v.is<long>())
-    os << v.as<long>();
-  else if (v.is<double>())
-    os << v.as<double>();
-  else
-    os << "JsonVariant";  // TODO
+  StreamPrintAdapter adapter(os);
+  v.printTo(adapter);
+  return os;
+}
+
+std::ostream& ArduinoJson::operator<<(std::ostream& os,
+                                      const ArduinoJson::JsonArray& v) {
+  StreamPrintAdapter adapter(os);
+  v.printTo(adapter);
   return os;
 }
diff --git a/test/Printers.hpp b/test/Printers.hpp
index 2b80ff8e..80f54a6a 100644
--- a/test/Printers.hpp
+++ b/test/Printers.hpp
@@ -11,4 +11,5 @@
 
 namespace ArduinoJson {
 std::ostream& operator<<(std::ostream& os, const ArduinoJson::JsonVariant& v);
+std::ostream& operator<<(std::ostream& os, const ArduinoJson::JsonArray& v);
 }