diff --git a/pyproject.toml b/pyproject.toml
index cb5199e5d6d..8726a0d40cd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -129,11 +129,7 @@ module = [
   'poetry.mixology.term',
   'poetry.mixology.version_solver',
   'poetry.repositories.installed_repository',
-  'poetry.utils.appdirs',
-  'poetry.utils.authenticator',
   'poetry.utils.env',
-  'poetry.utils.exporter',
-  'poetry.utils.setup_reader',
 ]
 ignore_errors = true
 
diff --git a/src/poetry/utils/appdirs.py b/src/poetry/utils/appdirs.py
index ca6bb9a432d..2d2f3f21985 100644
--- a/src/poetry/utils/appdirs.py
+++ b/src/poetry/utils/appdirs.py
@@ -7,17 +7,11 @@
 import os
 import sys
 
-from typing import TYPE_CHECKING
-
-
-if TYPE_CHECKING:
-    from pathlib import Path
-
 
 WINDOWS = sys.platform.startswith("win") or (sys.platform == "cli" and os.name == "nt")
 
 
-def expanduser(path: str | Path) -> str:
+def expanduser(path: str) -> str:
     """
     Expand ~ and ~user constructions.
 
@@ -214,14 +208,15 @@ def _get_win_folder_with_ctypes(csidl_name: str) -> str:
     }[csidl_name]
 
     buf = ctypes.create_unicode_buffer(1024)
-    ctypes.windll.shell32.SHGetFolderPathW(None, csidl_const, None, 0, buf)
+    windll = ctypes.windll  # type: ignore[attr-defined]
+    windll.shell32.SHGetFolderPathW(None, csidl_const, None, 0, buf)
 
     # Downgrade to short path name if have highbit chars. See
     # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
     has_high_char = any(ord(c) > 255 for c in buf)
     if has_high_char:
         buf2 = ctypes.create_unicode_buffer(1024)
-        if ctypes.windll.kernel32.GetShortPathNameW(buf.value, buf2, 1024):
+        if windll.kernel32.GetShortPathNameW(buf.value, buf2, 1024):
             buf = buf2
 
     return buf.value
diff --git a/src/poetry/utils/authenticator.py b/src/poetry/utils/authenticator.py
index 6c7758a1503..eb25805e855 100644
--- a/src/poetry/utils/authenticator.py
+++ b/src/poetry/utils/authenticator.py
@@ -33,9 +33,9 @@ class Authenticator:
     def __init__(self, config: Config, io: IO | None = None) -> None:
         self._config = config
         self._io = io
-        self._session = None
-        self._credentials = {}
-        self._certs = {}
+        self._session: requests.Session | None = None
+        self._credentials: dict[str, tuple[str, str]] = {}
+        self._certs: dict[str, dict[str, Path | None]] = {}
         self._password_manager = PasswordManager(self._config)
 
     def _log(self, message: str, level: str = "debug") -> None:
@@ -118,7 +118,9 @@ def get_credentials_for_url(self, url: str) -> tuple[str | None, str | None]:
 
         netloc = parsed_url.netloc
 
-        credentials = self._credentials.get(netloc, (None, None))
+        credentials: tuple[str | None, str | None] = self._credentials.get(
+            netloc, (None, None)
+        )
 
         if credentials == (None, None):
             if "@" not in netloc:
@@ -131,25 +133,27 @@ def get_credentials_for_url(self, url: str) -> tuple[str | None, str | None]:
                 # Split from the left because that's how urllib.parse.urlsplit()
                 # behaves if more than one : is present (which again can be checked
                 # using the password attribute of the return value)
-                credentials = auth.split(":", 1) if ":" in auth else (auth, None)
-                credentials = tuple(
-                    None if x is None else urllib.parse.unquote(x) for x in credentials
+                user, password = auth.split(":", 1) if ":" in auth else (auth, "")
+                credentials = (
+                    urllib.parse.unquote(user),
+                    urllib.parse.unquote(password),
                 )
 
-        if credentials[0] is not None or credentials[1] is not None:
+        if any(credential is not None for credential in credentials):
             credentials = (credentials[0] or "", credentials[1] or "")
-
             self._credentials[netloc] = credentials
 
-        return credentials[0], credentials[1]
+        return credentials
 
-    def get_pypi_token(self, name: str) -> str:
+    def get_pypi_token(self, name: str) -> str | None:
         return self._password_manager.get_pypi_token(name)
 
-    def get_http_auth(self, name: str) -> dict[str, str] | None:
+    def get_http_auth(self, name: str) -> dict[str, str | None] | None:
         return self._get_http_auth(name, None)
 
-    def _get_http_auth(self, name: str, netloc: str | None) -> dict[str, str] | None:
+    def _get_http_auth(
+        self, name: str, netloc: str | None
+    ) -> dict[str, str | None] | None:
         if name == "pypi":
             url = "https://upload.pypi.org/legacy/"
         else:
@@ -161,15 +165,18 @@ def _get_http_auth(self, name: str, netloc: str | None) -> dict[str, str] | None
 
         if netloc is None or netloc == parsed_url.netloc:
             auth = self._password_manager.get_http_auth(name)
+            auth = auth or {}
 
-            if auth is None or auth["password"] is None:
-                username = auth["username"] if auth else None
+            if auth.get("password") is None:
+                username = auth.get("username")
                 auth = self._get_credentials_for_netloc_from_keyring(
                     url, parsed_url.netloc, username
                 )
 
             return auth
 
+        return None
+
     def _get_credentials_for_netloc(self, netloc: str) -> tuple[str | None, str | None]:
         for repository_name, _ in self._get_repository_netlocs():
             auth = self._get_http_auth(repository_name, netloc)
@@ -177,7 +184,7 @@ def _get_credentials_for_netloc(self, netloc: str) -> tuple[str | None, str | No
             if auth is None:
                 continue
 
-            return auth["username"], auth["password"]
+            return auth.get("username"), auth.get("password")
 
         return None, None
 
@@ -199,7 +206,7 @@ def _get_repository_netlocs(self) -> Iterator[tuple[str, str]]:
 
     def _get_credentials_for_netloc_from_keyring(
         self, url: str, netloc: str, username: str | None
-    ) -> dict[str, str] | None:
+    ) -> dict[str, str | None] | None:
         import keyring
 
         cred = keyring.get_credential(url, username)
@@ -225,7 +232,7 @@ def _get_credentials_for_netloc_from_keyring(
         return None
 
     def _get_certs_for_netloc_from_config(self, netloc: str) -> dict[str, Path | None]:
-        certs = {"cert": None, "verify": None}
+        certs: dict[str, Path | None] = {"cert": None, "verify": None}
 
         for repository_name, repository_netloc in self._get_repository_netlocs():
             if netloc == repository_netloc:
diff --git a/src/poetry/utils/password_manager.py b/src/poetry/utils/password_manager.py
index 2d45a45b1b9..b525bdbae45 100644
--- a/src/poetry/utils/password_manager.py
+++ b/src/poetry/utils/password_manager.py
@@ -152,7 +152,7 @@ def delete_pypi_token(self, name: str) -> None:
 
         self.keyring.delete_password(name, "__token__")
 
-    def get_http_auth(self, name: str) -> dict[str, str] | None:
+    def get_http_auth(self, name: str) -> dict[str, str | None] | None:
         auth = self._config.get(f"http-basic.{name}")
         if not auth:
             username = self._config.get(f"http-basic.{name}.username")
@@ -181,10 +181,14 @@ def set_http_password(self, name: str, username: str, password: str) -> None:
 
     def delete_http_password(self, name: str) -> None:
         auth = self.get_http_auth(name)
-        if not auth or "username" not in auth:
+        if not auth:
+            return
+
+        username = auth.get("username")
+        if username is None:
             return
 
         with suppress(KeyRingError):
-            self.keyring.delete_password(name, auth["username"])
+            self.keyring.delete_password(name, username)
 
         self._config.auth_config_source.remove_property(f"http-basic.{name}")
diff --git a/src/poetry/utils/setup_reader.py b/src/poetry/utils/setup_reader.py
index baac42c12ff..1bc84450c63 100644
--- a/src/poetry/utils/setup_reader.py
+++ b/src/poetry/utils/setup_reader.py
@@ -5,7 +5,6 @@
 from configparser import ConfigParser
 from pathlib import Path
 from typing import Any
-from typing import Iterable
 
 from poetry.core.semver.version import Version
 
@@ -15,7 +14,7 @@ class SetupReader:
     Class that reads a setup.py file without executing it.
     """
 
-    DEFAULT = {
+    DEFAULT: dict[str, Any] = {
         "name": None,
         "version": None,
         "install_requires": [],
@@ -52,26 +51,27 @@ def read_setup_py(self, filepath: str | Path) -> dict[str, list | dict]:
         with filepath.open(encoding="utf-8") as f:
             content = f.read()
 
-        result = {}
+        result: dict[str, Any] = {}
 
         body = ast.parse(content).body
 
-        setup_call, body = self._find_setup_call(body)
-        if not setup_call:
+        setup_call = self._find_setup_call(body)
+        if setup_call is None:
             return self.DEFAULT
 
         # Inspecting keyword arguments
-        result["name"] = self._find_single_string(setup_call, body, "name")
-        result["version"] = self._find_single_string(setup_call, body, "version")
-        result["install_requires"] = self._find_install_requires(setup_call, body)
-        result["extras_require"] = self._find_extras_require(setup_call, body)
+        call, body = setup_call
+        result["name"] = self._find_single_string(call, body, "name")
+        result["version"] = self._find_single_string(call, body, "version")
+        result["install_requires"] = self._find_install_requires(call, body)
+        result["extras_require"] = self._find_extras_require(call, body)
         result["python_requires"] = self._find_single_string(
-            setup_call, body, "python_requires"
+            call, body, "python_requires"
         )
 
         return result
 
-    def read_setup_cfg(self, filepath: str | Path) -> dict[str, list | dict]:
+    def read_setup_cfg(self, filepath: str | Path) -> dict[str, Any]:
         parser = ConfigParser()
 
         parser.read(str(filepath))
@@ -85,7 +85,7 @@ def read_setup_cfg(self, filepath: str | Path) -> dict[str, list | dict]:
             version = Version.parse(parser.get("metadata", "version")).text
 
         install_requires = []
-        extras_require = {}
+        extras_require: dict[str, list[str]] = {}
         python_requires = None
         if parser.has_section("options"):
             if parser.has_option("options", "install_requires"):
@@ -119,9 +119,9 @@ def read_setup_cfg(self, filepath: str | Path) -> dict[str, list | dict]:
         }
 
     def _find_setup_call(
-        self, elements: list[Any]
-    ) -> tuple[ast.Call | None, list[Any] | None]:
-        funcdefs = []
+        self, elements: list[ast.stmt]
+    ) -> tuple[ast.Call, list[ast.stmt]] | None:
+        funcdefs: list[ast.stmt] = []
         for i, element in enumerate(elements):
             if isinstance(element, ast.If) and i == len(elements) - 1:
                 # Checking if the last element is an if statement
@@ -138,11 +138,13 @@ def _find_setup_call(
                 if left.id != "__name__":
                     continue
 
-                setup_call, body = self._find_sub_setup_call([element])
-                if not setup_call:
+                setup_call = self._find_sub_setup_call([element])
+                if setup_call is None:
                     continue
 
-                return setup_call, body + elements
+                call, body = setup_call
+                return call, body + elements
+
             if not isinstance(element, ast.Expr):
                 if isinstance(element, ast.FunctionDef):
                     funcdefs.append(element)
@@ -156,8 +158,7 @@ def _find_setup_call(
             func = value.func
             if not (isinstance(func, ast.Name) and func.id == "setup") and not (
                 isinstance(func, ast.Attribute)
-                and hasattr(func.value, "id")
-                and func.value.id == "setuptools"
+                and getattr(func.value, "id", None) == "setuptools"
                 and func.attr == "setup"
             ):
                 continue
@@ -168,24 +169,24 @@ def _find_setup_call(
         return self._find_sub_setup_call(funcdefs)
 
     def _find_sub_setup_call(
-        self, elements: list[Any]
-    ) -> tuple[ast.Call | None, list[Any] | None]:
+        self, elements: list[ast.stmt]
+    ) -> tuple[ast.Call, list[ast.stmt]] | None:
         for element in elements:
             if not isinstance(element, (ast.FunctionDef, ast.If)):
                 continue
 
             setup_call = self._find_setup_call(element.body)
-            if setup_call != (None, None):
-                setup_call, body = setup_call
+            if setup_call is not None:
+                sub_call, body = setup_call
 
                 body = elements + body
 
-                return setup_call, body
+                return sub_call, body
 
-        return None, None
+        return None
 
-    def _find_install_requires(self, call: ast.Call, body: Iterable[Any]) -> list[str]:
-        install_requires = []
+    def _find_install_requires(self, call: ast.Call, body: list[ast.stmt]) -> list[str]:
+        install_requires: list[str] = []
         value = self._find_in_call(call, "install_requires")
         if value is None:
             # Trying to find in kwargs
@@ -214,20 +215,22 @@ def _find_install_requires(self, call: ast.Call, body: Iterable[Any]) -> list[st
 
         if isinstance(value, ast.List):
             for el in value.elts:
-                install_requires.append(el.s)
+                if isinstance(el, ast.Str):
+                    install_requires.append(el.s)
         elif isinstance(value, ast.Name):
             variable = self._find_variable_in_body(body, value.id)
 
             if variable is not None and isinstance(variable, ast.List):
                 for el in variable.elts:
-                    install_requires.append(el.s)
+                    if isinstance(el, ast.Str):
+                        install_requires.append(el.s)
 
         return install_requires
 
     def _find_extras_require(
-        self, call: ast.Call, body: Iterable[Any]
-    ) -> dict[str, list]:
-        extras_require = {}
+        self, call: ast.Call, body: list[ast.stmt]
+    ) -> dict[str, list[str]]:
+        extras_require: dict[str, list[str]] = {}
         value = self._find_in_call(call, "extras_require")
         if value is None:
             # Trying to find in kwargs
@@ -255,12 +258,18 @@ def _find_extras_require(
             return extras_require
 
         if isinstance(value, ast.Dict):
+            val: ast.expr | None
             for key, val in zip(value.keys, value.values):
+                if not isinstance(key, ast.Str):
+                    continue
+
                 if isinstance(val, ast.Name):
                     val = self._find_variable_in_body(body, val.id)
 
                 if isinstance(val, ast.List):
-                    extras_require[key.s] = [e.s for e in val.elts]
+                    extras_require[key.s] = [
+                        e.s for e in val.elts if isinstance(e, ast.Str)
+                    ]
         elif isinstance(value, ast.Name):
             variable = self._find_variable_in_body(body, value.id)
 
@@ -268,16 +277,21 @@ def _find_extras_require(
                 return extras_require
 
             for key, val in zip(variable.keys, variable.values):
+                if not isinstance(key, ast.Str):
+                    continue
+
                 if isinstance(val, ast.Name):
                     val = self._find_variable_in_body(body, val.id)
 
                 if isinstance(val, ast.List):
-                    extras_require[key.s] = [e.s for e in val.elts]
+                    extras_require[key.s] = [
+                        e.s for e in val.elts if isinstance(e, ast.Str)
+                    ]
 
         return extras_require
 
     def _find_single_string(
-        self, call: ast.Call, body: list[Any], name: str
+        self, call: ast.Call, body: list[ast.stmt], name: str
     ) -> str | None:
         value = self._find_in_call(call, name)
         if value is None:
@@ -313,6 +327,8 @@ def _find_single_string(
             if variable is not None and isinstance(variable, ast.Str):
                 return variable.s
 
+        return None
+
     def _find_in_call(self, call: ast.Call, name: str) -> Any | None:
         for keyword in call.keywords:
             if keyword.arg == name:
@@ -327,12 +343,10 @@ def _find_call_kwargs(self, call: ast.Call) -> Any | None:
 
         return kwargs
 
-    def _find_variable_in_body(self, body: Iterable[Any], name: str) -> Any | None:
-        found = None
+    def _find_variable_in_body(
+        self, body: list[ast.stmt], name: str
+    ) -> ast.expr | None:
         for elem in body:
-            if found:
-                break
-
             if not isinstance(elem, ast.Assign):
                 continue
 
@@ -343,8 +357,11 @@ def _find_variable_in_body(self, body: Iterable[Any], name: str) -> Any | None:
                 if target.id == name:
                     return elem.value
 
-    def _find_in_dict(self, dict_: ast.Dict | ast.Call, name: str) -> Any | None:
+        return None
+
+    def _find_in_dict(self, dict_: ast.Dict, name: str) -> ast.expr | None:
         for key, val in zip(dict_.keys, dict_.values):
             if isinstance(key, ast.Str) and key.s == name:
                 return val
+
         return None