diff --git a/yardang/tests/test_all.py b/yardang/tests/test_all.py
index 0b89b6f..ce9a8a0 100644
--- a/yardang/tests/test_all.py
+++ b/yardang/tests/test_all.py
@@ -1,6 +1,9 @@
 import os
 from pathlib import Path
 
+import pytest
+from typer import Exit
+
 from yardang.build import generate_docs_configuration
 from yardang.cli import build, debug
 from yardang.utils import get_config_flex
@@ -16,6 +19,24 @@ def test_cli():
     debug()
 
 
+def test_cli_pdb_on_failure(monkeypatch):
+    class FailedProcess:
+        returncode = 1
+
+        @staticmethod
+        def poll():
+            return 1
+
+    traced = []
+    monkeypatch.setattr("yardang.cli.Popen", lambda *_args, **_kwargs: FailedProcess())
+    monkeypatch.setattr("pdb.set_trace", lambda: traced.append(True))
+
+    with pytest.raises(Exit):
+        build(pdb=True)
+
+    assert traced == [True]
+
+
 class TestUseAutoapi:
     """Tests for use_autoapi parameter handling."""
 
diff --git a/yardang/tests/test_breathe.py b/yardang/tests/test_breathe.py
index 4efc820..afaaaa6 100644
--- a/yardang/tests/test_breathe.py
+++ b/yardang/tests/test_breathe.py
@@ -431,7 +431,7 @@ class MockResult:
 
         monkeypatch.setattr(subprocess, "run", mock_run)
 
-        result = run_doxygen_if_needed({"mylib": str(xml_dir)}, quiet=True)
+        result = run_doxygen_if_needed({"mylib": str(xml_dir)})
         assert result == {"mylib": True}
         assert len(run_called) == 1
         assert run_called[0][1] == tmp_path  # cwd should be Doxyfile's parent
diff --git a/yardang/tests/test_wiki.py b/yardang/tests/test_wiki.py
index fd97eed..0fd41d6 100644
--- a/yardang/tests/test_wiki.py
+++ b/yardang/tests/test_wiki.py
@@ -167,6 +167,23 @@ def test_get_page_title_index_becomes_home(self, tmp_path):
         title = get_page_title(md_file)
         assert title == "Home"
 
+    def test_get_page_title_missing_file_falls_back_to_filename(self, tmp_path):
+        from yardang.wiki import get_page_title
+
+        title = get_page_title(tmp_path / "missing-page.md")
+
+        assert title == "Missing Page"
+
+    def test_extract_toctree_entries(self):
+        from yardang.wiki import extract_toctree_entries
+
+        content = """```{toctree}
+---
+overview
+```"""
+
+        assert extract_toctree_entries(content) == [(None, "overview")]
+
     def test_convert_filename_to_wiki_format(self):
         """Test filename conversion for wiki format."""
         from yardang.wiki import convert_filename_to_wiki_format