diff --git a/mypy-baseline.txt b/mypy-baseline.txt
index 6aed090c2..bf132120b 100644
--- a/mypy-baseline.txt
+++ b/mypy-baseline.txt
@@ -903,7 +903,6 @@ scripts/sect233r1.py:0: error: Incompatible types in assignment (expression has
 scripts/site_insights.py:0: error: Item "list[Any]" of "Union[dict[Any, Any], list[Any]]" has no attribute "get"  [union-attr]
 scripts/site_insights.py:0: error: Item "list[Any]" of "Union[dict[Any, Any], list[Any]]" has no attribute "get"  [union-attr]
 scripts/site_insights.py:0: error: Item "list[Any]" of "Union[dict[Any, Any], list[Any]]" has no attribute "get"  [union-attr]
-scripts/site_insights.py:0: error: Item "list[Any]" of "Union[dict[Any, Any], list[Any]]" has no attribute "get"  [union-attr]
 scripts/sitediagrams.py:0: error: "AST" has no attribute "value"  [attr-defined]
 scripts/sitediagrams.py:0: error: Argument 1 to "lstrip" of "bytes" has incompatible type "str"; expected "Optional[Buffer]"  [arg-type]
 scripts/sitediagrams.py:0: error: If x = b'abc' then f"{x}" or "{}".format(x) produces "b'abc'", not "abc". If this is desired behavior, use f"{x!r}" or "{!r}".format(x). Otherwise, decode the bytes  [str-bytes-safe]
diff --git a/scripts/make_demo.py b/scripts/make_demo.py
index 570b1b1cf..2bc1dd289 100644
--- a/scripts/make_demo.py
+++ b/scripts/make_demo.py
@@ -89,7 +89,8 @@ VIDEO_FPS = 25
 def game_bytes(name: str) -> bytes:
     """Bytes of a game no catalog names, the same on every run."""
     seed = hashlib.sha256(name.encode("utf-8")).digest()
-    blocks, counter = [], 0
+    blocks: list[bytes] = []
+    counter = 0
     while len(blocks) * 32 < GAME_BYTES:
         blocks.append(hashlib.sha256(seed + counter.to_bytes(4, "big")).digest())
         counter += 1
diff --git a/scripts/profile_sync.py b/scripts/profile_sync.py
index 16e47ffba..b72787608 100644
--- a/scripts/profile_sync.py
+++ b/scripts/profile_sync.py
@@ -5018,7 +5018,7 @@ def _print_triage(
 ) -> bool:
     """Profiles ranked by drift, worst first. False when Ctrl-C cut the
     scoring short: the ranking then covers the profiles scored."""
-    ranked = []
+    ranked: list[tuple[int, ProfileReport, str]] = []
     sampled = 0
     progress = _Progress(len(reports), "scored", args.offline or len(reports) < 2)
     complete = True
@@ -5299,7 +5299,7 @@ def main() -> None:
             raise SystemExit(1)
         return
 
-    reports = []
+    reports: list[ProfileReport] = []
     quiet = args.offline or len(selected) < 2
     if not quiet:
         print(
@@ -5474,18 +5474,18 @@ def _emit(
     triage was cut short."""
     if args.as_json:
         print(json.dumps([report_to_dict(r) for r in shown], indent=2))
-        return
+        return None
     if args.markdown:
         target = Path(args.report_dir) / f"profile-sync-{date.today().isoformat()}.md"
         target.parent.mkdir(parents=True, exist_ok=True)
         target.write_text(format_markdown(shown), encoding="utf-8")
         print(f"written: {target}")
-        return
+        return None
     if args.fetch_plan:
         for report in shown:
             for url in fetch_plan(report):
                 print(url)
-        return
+        return None
     if args.triage:
         return _print_triage(args, selected, shown)
     for report in shown:
@@ -5494,6 +5494,7 @@ def _emit(
         print()
     if args.changed_only:
         _print_elided(reports, len(shown), frozenset(report.name for report in shown))
+    return None
 
 
 def _print_elided(
diff --git a/scripts/site_insights.py b/scripts/site_insights.py
index f9edc0bfa..d55a8312f 100644
--- a/scripts/site_insights.py
+++ b/scripts/site_insights.py
@@ -123,7 +123,7 @@ def fetch_queries(start: dt.date, end: dt.date) -> list[Query]:
             return rows
 
 
-def fetch_goatcounter(start: dt.date, end: dt.date) -> dict[str, list[tuple[str, int]]]:
+def fetch_goatcounter(start: dt.date, end: dt.date) -> dict:
     """Paths and events with their visit counts, and the referring domains."""
     token = (CONFIG / "goatcounter-api-token.txt").read_text(encoding="utf-8").strip()
     auth = {"Authorization": f"Bearer {token}"}
@@ -140,6 +140,8 @@ def fetch_goatcounter(start: dt.date, end: dt.date) -> dict[str, list[tuple[str,
             break
     refs = _get_json(f"{GOATCOUNTER}/stats/toprefs?{urllib.parse.urlencode({**span, 'limit': 50})}", auth)
     total = _get_json(f"{GOATCOUNTER}/stats/total?{urllib.parse.urlencode(span)}", auth)
+    if not isinstance(refs, dict) or not isinstance(total, dict):
+        raise SystemExit("GoatCounter answered with something other than an object")
     # An action carries no referrer, and GoatCounter files it as a direct
     # visit: 592 of the first day's 1,145 "direct" were clicks.
     events = int(total.get("total_events", 0))
diff --git a/tests/test_refresh_data_dirs.py b/tests/test_refresh_data_dirs.py
index 604eba7ba..963a7e1fb 100644
--- a/tests/test_refresh_data_dirs.py
+++ b/tests/test_refresh_data_dirs.py
@@ -318,11 +318,12 @@ class TheManifestCarriesTheArchiveSize(unittest.TestCase):
             registry = {ref: {"source_type": "zip", "source_url": f"https://x/{ref}.zip",
                               "local_cache": str(data / ref)} for ref in ("pak", "old")}
             members = [(str(data / ref / "a.bin"), f"{ref}/a.bin") for ref in ("pak", "old")]
-            refs = {f"{ref}/a.bin": (ref, ("s",), ref) for ref in ("pak", "old")}
+            refs = {f"{ref}/a.bin": (ref, ("s",), ref, True) for ref in ("pak", "old")}
             listed = {entry["ref"]: entry for entry in
                       _manifest_data_directories(members, refs, registry, "")}
         self.assertEqual(listed["pak"]["archive_size"], 21_360_579)
         self.assertNotIn("archive_size", listed["old"])
+        self.assertNotIn("optional", listed["pak"])
 
 
 if __name__ == "__main__":