diff --git a/continuous_integration/scripts/test_report.py b/continuous_integration/scripts/test_report.py
index 1f339ed7ef..1f749a78fd 100644
--- a/continuous_integration/scripts/test_report.py
+++ b/continuous_integration/scripts/test_report.py
@@ -489,7 +489,7 @@ def main(argv: list[str] | None = None) -> None:
         total.groupby([total.file, total.test])
         .filter(lambda g: (g.status == "x").sum() >= args.nfails)
         .reset_index()
-        .assign(test=lambda df: df.file + "." + df.test)
+        .assign(test=lambda df: df.file + "." + df.test)  # type: ignore
         .groupby("test")
     )
     overall = {name: grouped.get_group(name) for name in grouped.groups}
diff --git a/distributed/worker_memory.py b/distributed/worker_memory.py
index e0ac5dde12..4f0c75d499 100644
--- a/distributed/worker_memory.py
+++ b/distributed/worker_memory.py
@@ -417,6 +417,7 @@ def memory_monitor(self, nanny: Nanny) -> None:
         except (ProcessLookupError, psutil.NoSuchProcess, psutil.AccessDenied):
             return  # pragma: nocover
 
+        assert self.memory_limit
         if memory / self.memory_limit <= self.memory_terminate_fraction:
             return