diff --git a/examples/tcp_discard_service.py b/examples/tcp_discard_service.py
index 6e40fb36..b005099e 100755
--- a/examples/tcp_discard_service.py
+++ b/examples/tcp_discard_service.py
@@ -52,12 +52,7 @@ class TcpDiscardService(TcpService):
     TCP Discard service support class.
     """
 
-    def __init__(
-        self,
-        *,
-        local_ip_address: str,
-        local_port: int,
-    ):
+    def __init__(self, *, local_ip_address: str, local_port: int):
         """
         Class constructor.
         """
diff --git a/examples/tcp_echo_service.py b/examples/tcp_echo_service.py
index a8f45531..7e49556e 100755
--- a/examples/tcp_echo_service.py
+++ b/examples/tcp_echo_service.py
@@ -53,12 +53,7 @@ class TcpEchoService(TcpService):
     TCP Echo service support class.
     """
 
-    def __init__(
-        self,
-        *,
-        local_ip_address: str,
-        local_port: int,
-    ):
+    def __init__(self, *, local_ip_address: str, local_port: int):
         """
         Class constructor.
         """
diff --git a/examples/udp_daytime_service.py b/examples/udp_daytime_service.py
index 0e99d1c0..3fead56c 100755
--- a/examples/udp_daytime_service.py
+++ b/examples/udp_daytime_service.py
@@ -53,12 +53,7 @@ class UdpDaytimeService(UdpService):
     UDP Echo service support class.
     """
 
-    def __init__(
-        self,
-        *,
-        local_ip_address: str,
-        local_port: int,
-    ):
+    def __init__(self, *, local_ip_address: str, local_port: int):
         """
         Class constructor.
         """
diff --git a/examples/udp_discard_service.py b/examples/udp_discard_service.py
index caf0d921..14052b5e 100755
--- a/examples/udp_discard_service.py
+++ b/examples/udp_discard_service.py
@@ -52,12 +52,7 @@ class UdpDiscardService(UdpService):
     UDP Echo service support class.
     """
 
-    def __init__(
-        self,
-        *,
-        local_ip_address: str,
-        local_port: int,
-    ):
+    def __init__(self, *, local_ip_address: str, local_port: int):
         """
         Class constructor.
         """
diff --git a/examples/udp_echo_service.py b/examples/udp_echo_service.py
index 34aeb3b8..ed296fc4 100755
--- a/examples/udp_echo_service.py
+++ b/examples/udp_echo_service.py
@@ -53,7 +53,7 @@ class UdpEchoService(UdpService):
     UDP Echo service support class.
     """
 
-    def __init__(self, *, local_ip_address: str = "::", local_port: int = 7):
+    def __init__(self, *, local_ip_address: str, local_port: int):
         """
         Class constructor.
         """