diff --git a/.gitignore b/.gitignore
index ac56fbb1b9..544c565bb2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,7 +2,6 @@
 .coverage
 .coverage.*
 .idea
-.vscode
 .project
 .pydevproject
 .settings
@@ -14,6 +13,9 @@
 coverage.xml
 proxy.py.iml
 
+.vscode/*
+!.vscode/settings.json
+
 *.pyc
 *.egg-info
 *.csr
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000000..5ea91a6910
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,31 @@
+{
+  "editor.defaultFormatter": "esbenp.prettier-vscode",
+  "editor.formatOnSave": true,
+  "editor.codeActionsOnSave": {
+    "source.fixAll": true
+  },
+  "editor.rulers": [100],
+  "python.testing.unittestEnabled": false,
+  "python.testing.autoTestDiscoverOnSaveEnabled": true,
+  "python.testing.pytestEnabled": true,
+  "python.testing.pytestArgs": ["tests"],
+  "python.linting.enabled": true,
+  "python.linting.lintOnSave": true,
+  "python.linting.ignorePatterns": [
+    ".tox/**/*.py",
+    ".vscode/*.py",
+    ".venv*/**/*.py",
+    "venv*/**/*.py",
+    "docs/**/*.py",
+    "helper/**/*.py",
+    "menubar/**/*.py"
+  ],
+  "python.linting.pylintEnabled": true,
+  "python.linting.pylintArgs": ["--generate-members"],
+  "python.linting.flake8Enabled": true,
+  "python.linting.mypyEnabled": true,
+  "python.formatting.provider": "autopep8",
+  "typescript.format.semicolons": "remove",
+  "typescript.preferences.quoteStyle": "single",
+  "autoDocstring.docstringFormat": "sphinx"
+}
diff --git a/proxy/core/base/tcp_upstream.py b/proxy/core/base/tcp_upstream.py
index 3f94edc2fe..e04ec5e90d 100644
--- a/proxy/core/base/tcp_upstream.py
+++ b/proxy/core/base/tcp_upstream.py
@@ -62,7 +62,7 @@ def __init__(self, *args: Any,  **kwargs: Any) -> None:
 
     @abstractmethod
     def handle_upstream_data(self, raw: memoryview) -> None:
-        pass
+        raise NotImplementedError()     # pragma: no cover
 
     def initialize_upstream(self, addr: str, port: int) -> None:
         self.upstream = TcpServerConnection(addr, port)