diff --git a/Makefile b/Makefile
--- a/Makefile
+++ b/Makefile
@@ -48,7 +48,7 @@ build:
 .PHONY: dev-env
 ## make dev-env based on the requirements files and install develop of packages
 dev-env:
-	pip install build virtualenv pipdeptree
+	pip install build virtualenv
 	pip wheel --wheel-dir=/home/rhodecode/.cache/pip/wheels -r requirements.txt -r requirements_test.txt -r requirements_debug.txt
 	pip install --no-index --find-links=/home/rhodecode/.cache/pip/wheels -r requirements.txt -r requirements_test.txt -r requirements_debug.txt
 	pip install -e .
diff --git a/requirements_debug.txt b/requirements_debug.txt
--- a/requirements_debug.txt
+++ b/requirements_debug.txt
@@ -1,12 +1,22 @@
 ## special libraries we could extend the requirements.txt file with to add some
-## custom libraries useful for debug and memory tracing
-
-## uncomment inclusion of this file in requirements.txt run make generate-pkgs and nix-shell
+## custom libraries usefull for debug and memory tracing
 
 objgraph
 memory-profiler
 pympler
+
+## debug
 ipdb
 ipython
+rich
+
+# format
 flake8
-rich
+ruff
+
+pipdeptree==2.7.1
+invoke==2.0.0
+bumpversion==0.6.0
+bump2version==1.0.1
+
+docutils-stubs
diff --git a/vcsserver/tests/test_hooks.py b/vcsserver/tests/test_hooks.py
--- a/vcsserver/tests/test_hooks.py
+++ b/vcsserver/tests/test_hooks.py
@@ -164,7 +164,7 @@ class TestHooksHttpClient(object):
             'method': hook_name,
             'extras': extras,
         })
-        assert hooks_proto == {'rc-hooks-protocol': 'msgpack.v1'}
+        assert hooks_proto == {'rc-hooks-protocol': 'msgpack.v1', 'Connection': 'keep-alive'}
         assert result == expected_result
 
     def test_call_queries_http_server(self, http_mirror):
@@ -259,7 +259,7 @@ def test_hooks_http_client_call():
     extras = {'key': 'value'}
 
     with \
-        mock.patch('vcsserver.hooks.HTTPConnection') as mock_connection,\
+        mock.patch('http.client.HTTPConnection') as mock_connection,\
         mock.patch('msgpack.load') as mock_load:
 
         client = HooksHttpClient(hooks_uri)
@@ -282,5 +282,5 @@ def test_hooks_http_client_serialize():
     extras = {'key': 'value'}
     headers, body = HooksHttpClient._serialize(method, extras)
 
-    assert headers == {'rc-hooks-protocol': HooksHttpClient.proto}
+    assert headers == {'rc-hooks-protocol': HooksHttpClient.proto, 'Connection': 'keep-alive'}
     assert msgpack.unpackb(body) == {'method': method, 'extras': extras}