diff --git a/doc/documentation.rst b/doc/documentation.rst
index e4b2bac..4568d51 100644
--- a/doc/documentation.rst
+++ b/doc/documentation.rst
@@ -249,7 +249,7 @@ parameters or as constructor argument.
                 return NotModifiedResponse(date=time_to_http())
 
         return FileResponse(req.document_root+"/filename",
-                            headers={'E-Tag': etag})
+                            headers={'ETag': etag})
 
 Partial Content
 ```````````````
diff --git a/examples/simple.py b/examples/simple.py
index 84109c7..6b0830d 100644
--- a/examples/simple.py
+++ b/examples/simple.py
@@ -269,7 +269,7 @@ def style(_):
 @app.route('/test/static')
 def test_dynamic(req, variable=None):
     """Test dynamics values."""
-    if not variable and req.headers.get('E-Tag') == 'W/"0123"':
+    if not variable and req.headers.get('ETag') == 'W/"0123"':
         return not_modified(req)
 
     var_info = {
@@ -299,7 +299,7 @@ def test_dynamic(req, variable=None):
         ("</table>",) + \
         get_footer()
 
-    response = Response(headers={'E-Tag': 'W/"0123"'})
+    response = Response(headers={'ETag': 'W/"0123"'})
     for line in buff:
         response.write(line + '\n')
     return response
@@ -640,7 +640,7 @@ def simple_py(req):
         if last_modified <= if_modified:
             return NotModifiedResponse(date=time_to_http())
 
-    response = FileResponse(__file__, headers={'E-Tag': etag})
+    response = FileResponse(__file__, headers={'ETag': etag})
     ranges = {}
     if 'Range' in req.headers:
         ranges = parse_range(req.headers['Range'])
diff --git a/poorwsgi/response.py b/poorwsgi/response.py
index 1443649..9821696 100644
--- a/poorwsgi/response.py
+++ b/poorwsgi/response.py
@@ -741,7 +741,7 @@ def __init__(self,
 
         super().__init__(status_code=HTTP_NOT_MODIFIED, headers=headers)
         if etag:
-            self.add_header('E-Tag', etag)
+            self.add_header('ETag', etag)
         if content_location:
             self.add_header('Content-Location', content_location)
         if isinstance(date, str) and date:
diff --git a/poorwsgi/results.py b/poorwsgi/results.py
index 974d146..cfecdbc 100644
--- a/poorwsgi/results.py
+++ b/poorwsgi/results.py
@@ -88,11 +88,11 @@ def handlers_view(handlers, sort=True):
 def not_modified(req):
     """Return NotModifiedResponse.
 
-    Headers E-Tag, Content-Location is return from request.
+    Headers ETag, Content-Location is return from request.
     Date header will be set.
     """
     return NotModifiedResponse(
-            etag=req.headers.get('E-Tag'),
+            etag=req.headers.get('ETag'),
             content_location=req.headers.get('Content-Location'),
             date=time_to_http())
 
diff --git a/tests/test_responses.py b/tests/test_responses.py
index ba24ae8..eab32cf 100644
--- a/tests/test_responses.py
+++ b/tests/test_responses.py
@@ -550,7 +550,7 @@ def test_params(self):
                                   content_location="content-location",
                                   date="22 Apr 2022",
                                   vary="yrav")
-        assert res.headers.get('E-Tag') == 'W/"etag"'
+        assert res.headers.get('ETag') == 'W/"etag"'
         assert res.headers.get('Content-Location') == "content-location"
         assert res.headers.get('Date') == "22 Apr 2022"
         assert res.headers.get('Vary') == "yrav"
diff --git a/tests_integrity/support.py b/tests_integrity/support.py
index 8881cf5..b63071a 100644
--- a/tests_integrity/support.py
+++ b/tests_integrity/support.py
@@ -19,7 +19,7 @@ class TestError(RuntimeError):
     """Support exception."""
 
 
-def start_server(request, example, env=None):
+def start_server(request, example, env=None, close=True):
     """Start web server with example."""
 
     process = None
@@ -27,10 +27,12 @@ def start_server(request, example, env=None):
     if request.config.getoption("--with-uwsgi"):
         env = env or {}
         env = [["--env", "=".join(items)] for items in env.items()]
-        env = list(chain.from_iterable(env))
+        params = list(chain.from_iterable(env))
+        if close:
+            params += ["--add-header", "Connection: Close"]
         process = Popen(["uwsgi", "--plugin", "python3",
-                         "--http-socket", "localhost:8080", "--wsgi-file",
-                         example] + env)
+                         "--http-socket", "localhost:8080",
+                         "--wsgi-file", example] + params)
     else:
         # pylint: disable=consider-using-with
         process = Popen([executable, example], env=env)
diff --git a/tests_integrity/test_simple.py b/tests_integrity/test_simple.py
index 4650bcc..ae2ab9a 100644
--- a/tests_integrity/test_simple.py
+++ b/tests_integrity/test_simple.py
@@ -53,7 +53,7 @@ def test_static(self, url):
     def test_static_not_modified(self, url):
         res = check_url(url+"/test/static")
         check_url(url+"/test/static", status_code=304,
-                  headers={'E-Tag': res.headers.get('E-Tag')})
+                  headers={'ETag': res.headers.get('ETag')})
 
     def test_variable_int(self, url):
         check_url(url+"/test/123")
@@ -116,7 +116,7 @@ def test_file_response_304_last_modified(self, url):
 
     def test_file_response_304_etag(self, url):
         res = check_url(url+"/simple.py")
-        etag = res.headers.get('E-Tag')
+        etag = res.headers.get('ETag')
         res = check_url(url+"/simple.py",
                         headers={'If-None-Match': etag},
                         status_code=304)
diff --git a/tests_integrity/test_websocket.py b/tests_integrity/test_websocket.py
index 101afff..99bf8cb 100644
--- a/tests_integrity/test_websocket.py
+++ b/tests_integrity/test_websocket.py
@@ -24,7 +24,8 @@ def server(request):
 
     process = start_server(
         request,
-        join(dirname(__file__), pardir, 'examples/websocket.py'))
+        join(dirname(__file__), pardir, 'examples/websocket.py'),
+        close=False)
 
     yield "localhost:8080"  # server is running
     process.kill()