fix test failures

src/pip/_internal/index/package_finder.py

@@ -903,6 +903,11 @@ class PackageFinder:
     def _process_project_url_uncached(
         self, project_url: Link, link_evaluator: LinkEvaluator
     ) -> List[InstallationCandidate]:
+        logger.debug(
+            "Fetching project page and analyzing links: %s",
+            project_url,
+        )
+
         index_response = self._link_collector.fetch_response(project_url)
         if index_response is None:
             return []

tests/unit/test_collector.py

@@ -90,7 +90,7 @@ def test_get_simple_response_archive_to_http_scheme(
 
     session.assert_has_calls(
         [
-            mock.call.head(url, allow_redirects=True),
+            mock.call.head(url, allow_redirects=True, headers=None),
         ]
     )
     mock_raise_for_status.assert_called_once_with(session.head.return_value)
@@ -152,7 +152,7 @@ def test_get_simple_response_archive_to_http_scheme_is_html(
 
     assert resp is not None
     assert session.mock_calls == [
-        mock.call.head(url, allow_redirects=True),
+        mock.call.head(url, allow_redirects=True, headers=None),
         mock.call.get(
             url,
             headers={
@@ -240,7 +240,7 @@ def test_get_simple_response_dont_log_clear_text_password(
     assert resp is not None
     mock_raise_for_status.assert_called_once_with(resp)
 
-    assert len(caplog.records) == 2
+    assert len(caplog.records) == 3
     record = caplog.records[0]
     assert record.levelname == "DEBUG"
     assert record.message.splitlines() == [
@@ -248,6 +248,9 @@ def test_get_simple_response_dont_log_clear_text_password(
     ]
     record = caplog.records[1]
     assert record.levelname == "DEBUG"
+    assert record.message.splitlines() == ["headers: None"]
+    record = caplog.records[2]
+    assert record.levelname == "DEBUG"
     assert record.message.splitlines() == [
         "Fetched page https://user:****@example.com/simple/ as text/html",
     ]
@@ -838,7 +841,7 @@ def test_get_index_content_directory_append_index(tmpdir: Path) -> None:
         mock_func.return_value = fake_response
         actual = _get_index_content(Link(dir_url), session=session)
         assert mock_func.mock_calls == [
-            mock.call(expected_url, session=session),
+            mock.call(expected_url, headers=None, session=session),
         ], f"actual calls: {mock_func.mock_calls}"
 
         assert actual is not None
@@ -957,6 +960,7 @@ class TestLinkCollector:
         # _get_simple_response().
         mock_get_simple_response.assert_called_once_with(
             url,
+            headers=None,
             session=link_collector.session,
         )