diff --git a/httpx/_urlparse.py b/httpx/_urlparse.py
index bf190fd560..34244d0124 100644
--- a/httpx/_urlparse.py
+++ b/httpx/_urlparse.py
@@ -166,9 +166,9 @@ class ParseResult(typing.NamedTuple):
 
     @property
     def authority(self) -> str:
+        # Do not include the userinfo here, to avoid leaking credentials
         return "".join(
             [
-                f"{self.userinfo}@" if self.userinfo else "",
                 f"[{self.host}]" if ":" in self.host else self.host,
                 f":{self.port}" if self.port is not None else "",
             ]
diff --git a/httpx/_urls.py b/httpx/_urls.py
index 147a8fa333..e7e488101e 100644
--- a/httpx/_urls.py
+++ b/httpx/_urls.py
@@ -375,30 +375,7 @@ def __str__(self) -> str:
         return str(self._uri_reference)
 
     def __repr__(self) -> str:
-        scheme, userinfo, host, port, path, query, fragment = self._uri_reference
-
-        if ":" in userinfo:
-            # Mask any password component.
-            userinfo = f'{userinfo.split(":")[0]}:[secure]'
-
-        authority = "".join(
-            [
-                f"{userinfo}@" if userinfo else "",
-                f"[{host}]" if ":" in host else host,
-                f":{port}" if port is not None else "",
-            ]
-        )
-        url = "".join(
-            [
-                f"{self.scheme}:" if scheme else "",
-                f"//{authority}" if authority else "",
-                path,
-                f"?{query}" if query is not None else "",
-                f"#{fragment}" if fragment is not None else "",
-            ]
-        )
-
-        return f"{self.__class__.__name__}({url!r})"
+        return f"{self.__class__.__name__}({str(self._uri_reference)!r})"
 
     @property
     def raw(self) -> tuple[bytes, bytes, int, bytes]:  # pragma: nocover
diff --git a/tests/client/test_auth.py b/tests/client/test_auth.py
index 7638b8bd68..166629dc42 100644
--- a/tests/client/test_auth.py
+++ b/tests/client/test_auth.py
@@ -302,7 +302,7 @@ async def test_auth_disable_per_request() -> None:
 
 def test_auth_hidden_url() -> None:
     url = "http://example-username:example-password@example.org/"
-    expected = "URL('http://example-username:[secure]@example.org/')"
+    expected = "URL('http://example.org/')"
     assert url == httpx.URL(url)
     assert expected == repr(httpx.URL(url))
 
diff --git a/tests/models/test_responses.py b/tests/models/test_responses.py
index 06c28e1e30..f470319ad8 100644
--- a/tests/models/test_responses.py
+++ b/tests/models/test_responses.py
@@ -89,7 +89,8 @@ def test_response_json():
 
 
 def test_raise_for_status():
-    request = httpx.Request("GET", "https://example.org")
+    # The credentials here should be removed from all exception strings below
+    request = httpx.Request("GET", "https://user:password@example.org")
 
     # 2xx status codes are not an error.
     response = httpx.Response(200, request=request)
diff --git a/tests/models/test_url.py b/tests/models/test_url.py
index 03072e8f5c..4c2119907f 100644
--- a/tests/models/test_url.py
+++ b/tests/models/test_url.py
@@ -591,7 +591,10 @@ def test_url_copywith_authority_subcomponents():
     }
     url = httpx.URL("https://example.org")
     new = url.copy_with(**copy_with_kwargs)
-    assert str(new) == "https://username:password@example.net:444"
+    assert str(new) == "https://example.net:444"
+    assert new.username == "username"
+    assert new.password == "password"
+    assert new.userinfo == b"username:password"
 
 
 def test_url_copywith_netloc():
@@ -610,7 +613,7 @@ def test_url_copywith_userinfo_subcomponents():
     }
     url = httpx.URL("https://example.org")
     new = url.copy_with(**copy_with_kwargs)
-    assert str(new) == "https://tom%40example.org:abc123%40%20%@example.org"
+    assert str(new) == "https://example.org"
     assert new.username == "tom@example.org"
     assert new.password == "abc123@ %"
     assert new.userinfo == b"tom%40example.org:abc123%40%20%"
diff --git a/tests/test_utils.py b/tests/test_utils.py
index f9c215f65a..2bd47e0810 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -65,6 +65,26 @@ def test_logging_request(server, caplog):
     ]
 
 
+def test_logging_request_with_auth(server, caplog):
+    caplog.set_level(logging.INFO)
+    with httpx.Client() as client:
+        credentials = {
+            "username": "user",
+            "password": "abc123%",
+        }
+        url = server.url.copy_with(**credentials)
+        response = client.get(url)
+        assert response.status_code == 200
+
+    assert caplog.record_tuples == [
+        (
+            "httpx",
+            logging.INFO,
+            'HTTP Request: GET http://127.0.0.1:8000/ "HTTP/1.1 200 OK"',
+        )
+    ]
+
+
 def test_logging_redirect_chain(server, caplog):
     caplog.set_level(logging.INFO)
     with httpx.Client(follow_redirects=True) as client: