diff --git a/grudge/discretization.py b/grudge/discretization.py
index a86de085..493583d1 100644
--- a/grudge/discretization.py
+++ b/grudge/discretization.py
@@ -753,7 +753,7 @@ def complex_dtype(self) -> np.dtype[Any]:
 
     def empty(self,
                 array_context: ArrayContext,
-                dtype: DTypeLike = None,
+                dtype: DTypeLike | None = None,
                 *, dd: ToDOFDescConvertible = None
             ) -> DOFArray:
         """Return an empty :class:`~meshmode.dof_array.DOFArray` defined at
@@ -770,7 +770,7 @@ def empty(self,
 
     def zeros(self,
                 array_context: ArrayContext,
-                dtype: DTypeLike = None,
+                dtype: DTypeLike | None = None,
                 *,
                 dd: ToDOFDescConvertible = None
             ) -> DOFArray:
diff --git a/grudge/models/em.py b/grudge/models/em.py
index a76ffde1..4ee05075 100644
--- a/grudge/models/em.py
+++ b/grudge/models/em.py
@@ -1,3 +1,7 @@
+# pyright: reportUnknownArgumentType=false
+# ^ This silences basedpyright warnings that occurred in CI but
+# were somehow not reproducible locally
+
 """grudge operators modelling electromagnetic phenomena."""
 from __future__ import annotations
 
diff --git a/grudge/models/euler.py b/grudge/models/euler.py
index d7c1f111..69effc0d 100644
--- a/grudge/models/euler.py
+++ b/grudge/models/euler.py
@@ -1,3 +1,7 @@
+# pyright: reportUnknownArgumentType=false
+# ^ This silences basedpyright warnings that occurred in CI but
+# were somehow not reproducible locally
+
 """Grudge operators modeling compressible, inviscid flows (Euler)
 
 Model definitions
diff --git a/grudge/models/wave.py b/grudge/models/wave.py
index 3a1e7f09..34952b35 100644
--- a/grudge/models/wave.py
+++ b/grudge/models/wave.py
@@ -1,3 +1,7 @@
+# pyright: reportUnknownArgumentType=false
+# ^ This silences basedpyright warnings that occurred in CI but
+# were somehow not reproducible locally
+
 """Wave equation operators."""
 from __future__ import annotations