diff --git a/arraycontext/container/traversal.py b/arraycontext/container/traversal.py
index b59fe794..5a4dcf74 100644
--- a/arraycontext/container/traversal.py
+++ b/arraycontext/container/traversal.py
@@ -965,7 +965,7 @@ def treat_as_scalar(x: Any) -> bool:
     elif isinstance(a, np.ndarray) or isinstance(b, np.ndarray):
         return map_array_container(lambda x: outer(x, b), a)
     else:
-        if type(a) != type(b):
+        if type(a) is not type(b):
             raise TypeError(
                 "both arguments must have the same type if they are both "
                 "non-object-array array containers.")
diff --git a/arraycontext/impl/jax/fake_numpy.py b/arraycontext/impl/jax/fake_numpy.py
index 09558208..27799cfe 100644
--- a/arraycontext/impl/jax/fake_numpy.py
+++ b/arraycontext/impl/jax/fake_numpy.py
@@ -159,7 +159,7 @@ def array_equal(self, a, b):
         false = actx.from_numpy(np.int8(False))
 
         def rec_equal(x, y):
-            if type(x) != type(y):
+            if type(x) is not type(y):
                 return false
 
             try:
diff --git a/arraycontext/impl/pyopencl/fake_numpy.py b/arraycontext/impl/pyopencl/fake_numpy.py
index d989d45a..a379f290 100644
--- a/arraycontext/impl/pyopencl/fake_numpy.py
+++ b/arraycontext/impl/pyopencl/fake_numpy.py
@@ -212,7 +212,7 @@ def array_equal(self, a, b):
         false = actx.from_numpy(np.int8(False))
 
         def rec_equal(x, y):
-            if type(x) != type(y):
+            if type(x) is not type(y):
                 return false
 
             try:
diff --git a/arraycontext/impl/pytato/fake_numpy.py b/arraycontext/impl/pytato/fake_numpy.py
index 14d9a968..6c78d419 100644
--- a/arraycontext/impl/pytato/fake_numpy.py
+++ b/arraycontext/impl/pytato/fake_numpy.py
@@ -167,7 +167,7 @@ def array_equal(self, a, b):
         false = actx.from_numpy(np.int8(False))
 
         def rec_equal(x, y):
-            if type(x) != type(y):
+            if type(x) is not type(y):
                 return false
 
             try: