diff --git a/src/poetry/utils/authenticator.py b/src/poetry/utils/authenticator.py
index 9c01461e9fa..cd6e5cb2101 100644
--- a/src/poetry/utils/authenticator.py
+++ b/src/poetry/utils/authenticator.py
@@ -103,7 +103,7 @@ def request(self, method: str, url: str, **kwargs: Any) -> requests.Response:
     def get_credentials_for_url(self, url: str) -> Tuple[Optional[str], Optional[str]]:
         parsed_url = urllib.parse.urlsplit(url)
 
-        netloc = parsed_url.netloc
+        netloc = parsed_url.netloc + parsed_url.path
 
         credentials = self._credentials.get(netloc, (None, None))
 
@@ -148,7 +148,7 @@ def _get_http_auth(
 
         parsed_url = urllib.parse.urlsplit(url)
 
-        if netloc is None or netloc == parsed_url.netloc:
+        if netloc is None or netloc.startswith(parsed_url.netloc + parsed_url.path):
             auth = self._password_manager.get_http_auth(name)
 
             if auth is None or auth["password"] is None:
diff --git a/tests/utils/test_authenticator.py b/tests/utils/test_authenticator.py
index cf41f4f6a87..63cab167ac1 100644
--- a/tests/utils/test_authenticator.py
+++ b/tests/utils/test_authenticator.py
@@ -69,7 +69,7 @@ def test_authenticator_uses_credentials_from_config_if_not_provided(
     )
 
     authenticator = Authenticator(config, NullIO())
-    authenticator.request("get", "https://foo.bar/files/foo-0.1.0.tar.gz")
+    authenticator.request("get", "https://foo.bar/simple/files/foo-0.1.0.tar.gz")
 
     request = http.last_request()
 
@@ -90,7 +90,7 @@ def test_authenticator_uses_username_only_credentials(
     )
 
     authenticator = Authenticator(config, NullIO())
-    authenticator.request("get", "https://foo001@foo.bar/files/foo-0.1.0.tar.gz")
+    authenticator.request("get", "https://foo001@foo.bar/simple/files/foo-0.1.0.tar.gz")
 
     request = http.last_request()
 
@@ -108,7 +108,9 @@ def test_authenticator_uses_password_only_credentials(
     )
 
     authenticator = Authenticator(config, NullIO())
-    authenticator.request("get", "https://:bar002@foo.bar/files/foo-0.1.0.tar.gz")
+    authenticator.request(
+        "get", "https://:bar002@foo.bar/simple/files/foo-0.1.0.tar.gz"
+    )
 
     request = http.last_request()
 
@@ -129,7 +131,7 @@ def test_authenticator_uses_empty_strings_as_default_password(
     )
 
     authenticator = Authenticator(config, NullIO())
-    authenticator.request("get", "https://foo.bar/files/foo-0.1.0.tar.gz")
+    authenticator.request("get", "https://foo.bar/simple/files/foo-0.1.0.tar.gz")
 
     request = http.last_request()
 
@@ -147,7 +149,7 @@ def test_authenticator_uses_empty_strings_as_default_username(
     )
 
     authenticator = Authenticator(config, NullIO())
-    authenticator.request("get", "https://foo.bar/files/foo-0.1.0.tar.gz")
+    authenticator.request("get", "https://foo.bar/simple/files/foo-0.1.0.tar.gz")
 
     request = http.last_request()
 
@@ -172,7 +174,7 @@ def test_authenticator_falls_back_to_keyring_url(
     )
 
     authenticator = Authenticator(config, NullIO())
-    authenticator.request("get", "https://foo.bar/files/foo-0.1.0.tar.gz")
+    authenticator.request("get", "https://foo.bar/simple/files/foo-0.1.0.tar.gz")
 
     request = http.last_request()
 
@@ -195,7 +197,7 @@ def test_authenticator_falls_back_to_keyring_netloc(
     dummy_keyring.set_password("foo.bar", None, SimpleCredential(None, "bar"))
 
     authenticator = Authenticator(config, NullIO())
-    authenticator.request("get", "https://foo.bar/files/foo-0.1.0.tar.gz")
+    authenticator.request("get", "https://foo.bar/simple/files/foo-0.1.0.tar.gz")
 
     request = http.last_request()
 
@@ -303,7 +305,7 @@ def test_authenticator_uses_env_provided_credentials(
     config.merge({"repositories": {"foo": {"url": "https://foo.bar/simple/"}}})
 
     authenticator = Authenticator(config, NullIO())
-    authenticator.request("get", "https://foo.bar/files/foo-0.1.0.tar.gz")
+    authenticator.request("get", "https://foo.bar/simple/files/foo-0.1.0.tar.gz")
 
     request = http.last_request()