diff --git a/tests/test_issue_140_roundtrip.py b/tests/test_issue_140_roundtrip.py
index 2adece15..333296ba 100644
--- a/tests/test_issue_140_roundtrip.py
+++ b/tests/test_issue_140_roundtrip.py
@@ -81,10 +81,11 @@ class TestExplodeImplodeRoundtrip:
         assert exploded_dir.exists()
 
         # Verify exploded structure exists
-        assert (exploded_dir / "introduction.md").exists()
-        assert (exploded_dir / "chapter_1_getting_started").exists()
-        assert (exploded_dir / "chapter_1_getting_started" / "index.md").exists()
-        assert (exploded_dir / "chapter_1_getting_started" / "section_1_1_overview.md").exists()
+        assert (exploded_dir / "book_title").exists()
+        assert (exploded_dir / "book_title" / "index.md").exists()
+        assert (exploded_dir / "book_title" / "chapter_1_getting_started").exists()
+        assert (exploded_dir / "book_title" / "chapter_1_getting_started" / "index.md").exists()
+        assert (exploded_dir / "book_title" / "chapter_1_getting_started" / "section_1_1_overview.md").exists()
 
         # Step 2: Implode directory back to markdown
         reconstructed_file = self.temp_dir / "reconstructed.md"
@@ -393,17 +394,16 @@ class TestImplodeExplodeRoundtrip:
         assert reconstructed_dir.exists()
 
         # Step 3: Verify directory structure is reconstructed
-        # Check for key files and directories
-        assert (reconstructed_dir / "introduction.md").exists()
-        assert (reconstructed_dir / "chapter_1_basics").exists()
-        assert (reconstructed_dir / "chapter_1_basics" / "index.md").exists()
-        assert (reconstructed_dir / "chapter_1_basics" / "section_1_1_overview.md").exists()
-        assert (reconstructed_dir / "chapter_2_advanced").exists()
-        assert (reconstructed_dir / "chapter_2_advanced" / "subsection_2_1_algorithms").exists()
+        # Check for key files and directories (explode creates a directory named after the first h1)
+        assert (reconstructed_dir / "sample_project").exists()
+        assert (reconstructed_dir / "sample_project" / "index.md").exists()
+        assert (reconstructed_dir / "sample_project" / "chapter_1_basics.md").exists()
+        assert (reconstructed_dir / "sample_project" / "chapter_2_advanced").exists()
+        assert (reconstructed_dir / "sample_project" / "chapter_2_advanced" / "index.md").exists()
         assert (reconstructed_dir / "conclusion.md").exists()
 
         # Verify content preservation
-        intro_content = (reconstructed_dir / "introduction.md").read_text()
+        intro_content = (reconstructed_dir / "sample_project" / "index.md").read_text()
         assert "# Sample Project" in intro_content
         assert "This is a sample project for testing" in intro_content
 
@@ -443,14 +443,15 @@ class TestImplodeExplodeRoundtrip:
             "--output-dir", str(reconstructed_dir)
         ])
 
-        # Verify deep structure is preserved
-        assert (reconstructed_dir / "level_1.md").exists()
-        assert (reconstructed_dir / "level_2_section").exists()
-        assert (reconstructed_dir / "level_2_section" / "level_3_section").exists()
-        assert (reconstructed_dir / "level_2_section" / "level_3_section" / "level_4_section").exists()
+        # Verify deep structure is preserved (explode creates directory named after first h1)
+        assert (reconstructed_dir / "level_1").exists()
+        assert (reconstructed_dir / "level_1" / "index.md").exists()
+        assert (reconstructed_dir / "level_1" / "level_2").exists()
+        assert (reconstructed_dir / "level_1" / "level_2" / "level_3").exists()
+        assert (reconstructed_dir / "level_1" / "level_2" / "level_3" / "level_4").exists()
 
         # Verify content at different levels
-        level_1_content = (reconstructed_dir / "level_1.md").read_text()
+        level_1_content = (reconstructed_dir / "level_1" / "index.md").read_text()
         assert "# Level 1" in level_1_content
         assert "Content at level 1." in level_1_content