diff --git a/examples/alt_spec.py b/examples/alt_spec.py
index 074781a3..d5c682f1 100644
--- a/examples/alt_spec.py
+++ b/examples/alt_spec.py
@@ -13,7 +13,7 @@
 
 def load(arg):
     def app(environ, start_response):
-        data = 'Hello, %s!\n' % arg
+        data = b'Hello, %s!\n' % arg
         status = '200 OK'
         response_headers = [
             ('Content-type', 'text/plain'),
diff --git a/examples/echo.py b/examples/echo.py
index 974079a9..5f7d79e2 100644
--- a/examples/echo.py
+++ b/examples/echo.py
@@ -5,20 +5,15 @@
 #
 # Example code from Eventlet sources
 
-import os
-import pprint
 from wsgiref.validate import validator
-import sys
 
 from gunicorn import __version__
-#@validator
+
+
+@validator
 def app(environ, start_response):
     """Simplest possible application object"""
 
-    errors = environ['wsgi.errors']
-#    pprint.pprint(('ENVIRON', environ), stream=errors)
-
-    print(environ)
     if environ['REQUEST_METHOD'].upper() != 'POST':
         data = b'Hello, World!\n'
     else:
diff --git a/examples/multiapp.py b/examples/multiapp.py
index c6a4c90b..c8888586 100644
--- a/examples/multiapp.py
+++ b/examples/multiapp.py
@@ -16,7 +16,7 @@
 
 try:
     from routes import Mapper
-except:
+except ImportError:
     print("This example requires Routes to be installed")
 
 # Obviously you'd import your app callables
diff --git a/examples/sendfile.py b/examples/sendfile.py
index 346d0381..d8489d9b 100644
--- a/examples/sendfile.py
+++ b/examples/sendfile.py
@@ -8,7 +8,8 @@
 import os
 from wsgiref.validate import validator
 
-#@validator
+
+@validator
 def app(environ, start_response):
     """Simplest possible application object"""
     status = '200 OK'
diff --git a/examples/test.py b/examples/test.py
index fc8b8162..84f9102c 100644
--- a/examples/test.py
+++ b/examples/test.py
@@ -5,19 +5,15 @@
 #
 # Example code from Eventlet sources
 
-import os
-import pprint
 from wsgiref.validate import validator
-import sys
 
 from gunicorn import __version__
-#@validator
+
+
+@validator
 def app(environ, start_response):
     """Simplest possible application object"""
 
-    errors = environ['wsgi.errors']
-#    pprint.pprint(('ENVIRON', environ), stream=errors)
-
     data = b'Hello, World!\n'
     status = '200 OK'