diff --git a/include/ArduinoJson/Internals/JsonObjectNode.hpp b/include/ArduinoJson/Internals/JsonObjectNode.hpp
index 6ea76f7d..356403a8 100644
--- a/include/ArduinoJson/Internals/JsonObjectNode.hpp
+++ b/include/ArduinoJson/Internals/JsonObjectNode.hpp
@@ -18,6 +18,9 @@ class JsonObjectNode {
 
   JsonPair pair;
   JsonObjectNode* next;
+
+  // warning C4512: assignment operator could not be generated
+  #pragma warning( suppress : 4512 ) 
 };
 }
 }
diff --git a/include/ArduinoJson/JsonArray.hpp b/include/ArduinoJson/JsonArray.hpp
index ec371abc..be60eae4 100644
--- a/include/ArduinoJson/JsonArray.hpp
+++ b/include/ArduinoJson/JsonArray.hpp
@@ -68,7 +68,7 @@ class JsonArray : public JsonPrintable {
   static JsonArray _invalid;
 };
 
-bool operator==(const JsonArray &left, const JsonArray &right) {
+inline bool operator==(const JsonArray &left, const JsonArray &right) {
   // two JsonArray are equal if they are the same instance
   // (we don't compare the content)
   return &left == &right;
diff --git a/include/ArduinoJson/JsonObject.hpp b/include/ArduinoJson/JsonObject.hpp
index 52e39ca3..e2f8b3b8 100644
--- a/include/ArduinoJson/JsonObject.hpp
+++ b/include/ArduinoJson/JsonObject.hpp
@@ -72,7 +72,7 @@ class JsonObject : public JsonPrintable {
   static JsonObject _invalid;
 };
 
-bool operator==(const JsonObject &left, const JsonObject &right) {
+inline bool operator==(const JsonObject &left, const JsonObject &right) {
   // two JsonObject are equal if they are the same instance
   // (we don't compare the content)
   return &left == &right;
diff --git a/include/ArduinoJson/JsonPair.hpp b/include/ArduinoJson/JsonPair.hpp
index d540ad30..33cf9816 100644
--- a/include/ArduinoJson/JsonPair.hpp
+++ b/include/ArduinoJson/JsonPair.hpp
@@ -16,5 +16,8 @@ struct JsonPair {
 
   const char* const key;
   JsonValue value;
+
+  // warning C4512: assignment operator could not be generated
+  #pragma warning( suppress : 4512 ) 
 };
-}
+}
\ No newline at end of file
diff --git a/include/ArduinoJson/JsonValue.hpp b/include/ArduinoJson/JsonValue.hpp
index 594c48ce..2a5c9a2b 100644
--- a/include/ArduinoJson/JsonValue.hpp
+++ b/include/ArduinoJson/JsonValue.hpp
@@ -45,6 +45,7 @@ class JsonValue {
   operator const char *() const;
   operator double() const;
   operator long() const;
+  operator int() const { return operator long(); }
   operator JsonArray &() const;
   operator JsonObject &() const;
 
diff --git a/src/JsonArray.cpp b/src/JsonArray.cpp
index 0233df70..88d1fd49 100644
--- a/src/JsonArray.cpp
+++ b/src/JsonArray.cpp
@@ -39,7 +39,7 @@ JsonValue &JsonArray::add() {
 }
 
 JsonArrayNode *JsonArray::createNode() {
-  if (_buffer) return NULL;
+  if (!_buffer) return NULL;
   void *ptr = _buffer->alloc(sizeof(JsonArrayNode));
   return ptr ? new (ptr) JsonArrayNode() : NULL;
 }
diff --git a/test/JsonObject_Container_Tests.cpp b/test/JsonObject_Container_Tests.cpp
index 62de2d1c..39213455 100644
--- a/test/JsonObject_Container_Tests.cpp
+++ b/test/JsonObject_Container_Tests.cpp
@@ -18,7 +18,7 @@ class JsonObject_Container_Tests : public ::testing::Test {
   JsonObject_Container_Tests() : object(json.createObject()) {}
 
  protected:
-  StaticJsonBuffer<42> json;
+  StaticJsonBuffer<256> json;
   JsonObject& object;
 };