diff --git a/hbmqtt/mqtt/connack.py b/hbmqtt/mqtt/connack.py
index 467170c..2879160 100644
--- a/hbmqtt/mqtt/connack.py
+++ b/hbmqtt/mqtt/connack.py
@@ -43,14 +43,14 @@ class ConnackVariableHeader(MQTTVariableHeader):
         return out
 
     def __repr__(self):
-        return 'ConnackVariableHeader(session_parent={0}, return_code={1})'.format(hex(self.session_parent), hex(self.return_code.value))
+        return type(self).__name__ + '(session_parent={0}, return_code={1})'.format(hex(self.session_parent), hex(self.return_code.value))
 
 
 class ConnackPacket(MQTTPacket):
     VARIABLE_HEADER = ConnackVariableHeader
     PAYLOAD = None
 
-    def __init__(self, fixed: MQTTFixedHeader, variable_header: ConnackVariableHeader=None):
+    def __init__(self, fixed: MQTTFixedHeader=None, variable_header: ConnackVariableHeader=None, payload=None):
         if fixed is None:
             header = MQTTFixedHeader(PacketType.CONNACK, 0x00)
         else:
diff --git a/hbmqtt/mqtt/packet.py b/hbmqtt/mqtt/packet.py
index c6de8a8..ba1ef3e 100644
--- a/hbmqtt/mqtt/packet.py
+++ b/hbmqtt/mqtt/packet.py
@@ -120,7 +120,7 @@ class MQTTFixedHeader:
         return cls(msg_type, flags, remain_length)
 
     def __repr__(self):
-        return 'MQTTFixedHeader(type={0}, length={1}, flags={2})'.format(self.packet_type, self.remaining_length, hex(self.flags))
+        return type(self).__name__ + '(type={0}, length={1}, flags={2})'.format(self.packet_type, self.remaining_length, hex(self.flags))
 
 class MQTTVariableHeader(metaclass=abc.ABCMeta):
     def __init__(self):
@@ -209,7 +209,7 @@ class MQTTPacket:
         return cls(fixed_header, variable_header, payload)
 
     def __repr__(self):
-        return 'MQPacket(fixed={0!r}, variable={1!r}, payload={2!r})'.format(self.fixed_header, self.variable_header, self.payload)
+        return type(self).__name__ + '(fixed={0!r}, variable={1!r}, payload={2!r})'.format(self.fixed_header, self.variable_header, self.payload)
 
 
 class PacketIdVariableHeader(MQTTVariableHeader):
diff --git a/hbmqtt/mqtt/pingreq.py b/hbmqtt/mqtt/pingreq.py
index d51a7e2..f886ec7 100644
--- a/hbmqtt/mqtt/pingreq.py
+++ b/hbmqtt/mqtt/pingreq.py
@@ -8,7 +8,7 @@ class PingReqPacket(MQTTPacket):
     VARIABLE_HEADER = None
     PAYLOAD = None
 
-    def __init__(self, fixed: MQTTFixedHeader=None):
+    def __init__(self, fixed: MQTTFixedHeader=None, variable_header=None, payload=None):
         if fixed is None:
             header = MQTTFixedHeader(PacketType.PINGREQ, 0x00)
         else:
diff --git a/hbmqtt/mqtt/pingresp.py b/hbmqtt/mqtt/pingresp.py
index 2f0a704..9802198 100644
--- a/hbmqtt/mqtt/pingresp.py
+++ b/hbmqtt/mqtt/pingresp.py
@@ -8,7 +8,7 @@ class PingRespPacket(MQTTPacket):
     VARIABLE_HEADER = None
     PAYLOAD = None
 
-    def __init__(self, fixed: MQTTFixedHeader=None):
+    def __init__(self, fixed: MQTTFixedHeader=None, variable_header=None, payload=None):
         if fixed is None:
             header = MQTTFixedHeader(PacketType.PINGREQ, 0x00)
         else: