diff --git a/tests/test_table_utils.py b/tests/test_table_utils.py
new file mode 100644
index 0000000..f3d273f
--- /dev/null
+++ b/tests/test_table_utils.py
@@ -0,0 +1,80 @@
+from auditui import table_utils
+
+
+class StubLibrary:
+    def extract_title(self, item: dict) -> str:
+        return item.get("title", "")
+
+    def extract_authors(self, item: dict) -> str:
+        return item.get("authors", "")
+
+    def extract_runtime_minutes(self, item: dict) -> int | None:
+        return item.get("minutes")
+
+    def format_duration(
+        self, value: int | None, unit: str = "minutes", default_none: str | None = None
+    ) -> str | None:
+        if value is None:
+            return default_none
+        return f"{value}m"
+
+    def extract_progress_info(self, item: dict) -> float | None:
+        return item.get("percent")
+
+    def extract_asin(self, item: dict) -> str | None:
+        return item.get("asin")
+
+
+class StubDownloads:
+    def __init__(self, cached: set[str]) -> None:
+        self._cached = cached
+
+    def is_cached(self, asin: str) -> bool:
+        return asin in self._cached
+
+
+def test_create_title_sort_key_normalizes_accents() -> None:
+    key_fn, _ = table_utils.create_title_sort_key()
+    assert key_fn(["École"]) == "ecole"
+    assert key_fn(["Zoo"]) == "zoo"
+
+
+def test_create_progress_sort_key_parses_percent() -> None:
+    key_fn, _ = table_utils.create_progress_sort_key()
+    assert key_fn(["0", "0", "0", "42.5%"]) == 42.5
+    assert key_fn(["0", "0", "0", "bad"]) == 0.0
+
+
+def test_truncate_author_name() -> None:
+    long_name = "A" * (table_utils.AUTHOR_NAME_MAX_LENGTH + 5)
+    truncated = table_utils.truncate_author_name(long_name)
+    assert truncated.endswith("...")
+    assert len(truncated) <= table_utils.AUTHOR_NAME_MAX_LENGTH
+
+
+def test_format_item_as_row_with_downloaded() -> None:
+    library = StubLibrary()
+    downloads = StubDownloads({"ASIN123"})
+    item = {
+        "title": "Title",
+        "authors": "Author One",
+        "minutes": 90,
+        "percent": 12.34,
+        "asin": "ASIN123",
+    }
+    title, author, runtime, progress, downloaded = table_utils.format_item_as_row(
+        item, library, downloads
+    )
+    assert title == "Title"
+    assert author == "Author One"
+    assert runtime == "90m"
+    assert progress == "12.3%"
+    assert downloaded == "✓"
+
+
+def test_format_item_as_row_zero_progress() -> None:
+    library = StubLibrary()
+    item = {"title": "Title", "authors": "Author",
+            "minutes": 30, "percent": 0.0}
+    _, _, _, progress, _ = table_utils.format_item_as_row(item, library, None)
+    assert progress == "0%"