diff --git a/xarray_beam/_src/combiners.py b/xarray_beam/_src/combiners.py
index 1cf3e89..0e1adc7 100644
--- a/xarray_beam/_src/combiners.py
+++ b/xarray_beam/_src/combiners.py
@@ -288,7 +288,7 @@ def _optimal_fanout_bins(
   )
   # The dict of candidates is empty if chunks_count=1, in which can there's no
   # need to use a combiner.
-  return min(candidates, key=candidates.get) if candidates else ()
+  return min(candidates, key=candidates.get) if candidates else ()  # pyrefly: ignore[no-matching-overload]
 
 
 @dataclasses.dataclass
diff --git a/xarray_beam/_src/dataset.py b/xarray_beam/_src/dataset.py
index 396819e..c43d246 100644
--- a/xarray_beam/_src/dataset.py
+++ b/xarray_beam/_src/dataset.py
@@ -159,7 +159,7 @@ def normalize_chunks(
 
   if ... in chunks:  # pyrefly: ignore[not-iterable, unsupported-operation]
     default_chunks = chunks[...]  # pyrefly: ignore[bad-index]
-    chunks = {k: chunks.get(k, default_chunks) for k in template.dims}  # pyrefly: ignore[bad-assignment]
+    chunks = {k: chunks.get(k, default_chunks) for k in template.dims}  # pyrefly: ignore[bad-assignment, missing-attribute]
 
   defaults = previous_chunks if previous_chunks else template.sizes
   chunks: dict[str, int | str] = {**defaults, **chunks}  # pytype: disable=annotation-type-mismatch
diff --git a/xarray_beam/_src/zarr.py b/xarray_beam/_src/zarr.py
index 61713f4..1758192 100644
--- a/xarray_beam/_src/zarr.py
+++ b/xarray_beam/_src/zarr.py
@@ -125,7 +125,7 @@ def make_template(
   """
   if lazy_vars is None:
     lazy_vars = set(dataset.keys())  # pyrefly: ignore[bad-assignment]
-    lazy_vars.update(k for k in dataset.coords if k not in dataset.indexes)
+    lazy_vars.update(k for k in dataset.coords if k not in dataset.indexes)  # pyrefly: ignore[missing-attribute]
 
   result = dataset.copy()