diff --git a/src/array_api_extra/_delegation.py b/src/array_api_extra/_delegation.py
index d95e9fd3..01a57f63 100644
--- a/src/array_api_extra/_delegation.py
+++ b/src/array_api_extra/_delegation.py
@@ -24,6 +24,7 @@
 from ._lib._utils._typing import Array, Device, DType
 
 __all__ = [
+    "argpartition",
     "atleast_nd",
     "broadcast_shapes",
     "cov",
@@ -31,14 +32,18 @@
     "diag_indices",
     "expand_dims",
     "isclose",
+    "isin",
     "kron",
     "nan_to_num",
     "one_hot",
     "pad",
+    "partition",
     "searchsorted",
+    "setdiff1d",
     "sinc",
     "tril_indices",
     "triu_indices",
+    "union1d",
     "unravel_index",
 ]
 
diff --git a/src/array_api_extra/_lib/_funcs.py b/src/array_api_extra/_lib/_funcs.py
index f2e27a43..4b8a7ce7 100644
--- a/src/array_api_extra/_lib/_funcs.py
+++ b/src/array_api_extra/_lib/_funcs.py
@@ -26,20 +26,29 @@
 __all__ = [
     "angle",
     "apply_where",
+    "argpartition",
     "atleast_nd",
     "broadcast_shapes",
     "cov",
     "create_diagonal",
+    "default_dtype",
     "diag_indices",
     "expand_dims",
+    "isclose",
+    "isin",
     "kron",
+    "nan_to_num",
     "nunique",
+    "one_hot",
     "pad",
+    "partition",
     "searchsorted",
     "setdiff1d",
     "sinc",
     "tril_indices",
     "triu_indices",
+    "union1d",
+    "unravel_index",
 ]
 
 
diff --git a/tests/test_funcs.py b/tests/test_funcs.py
index 498269b5..5e3af6e6 100644
--- a/tests/test_funcs.py
+++ b/tests/test_funcs.py
@@ -1,3 +1,4 @@
+import inspect
 import math
 import warnings
 from collections.abc import Callable
@@ -12,6 +13,7 @@
 from hypothesis import strategies as st
 from typing_extensions import override
 
+import array_api_extra._delegation as delegated_func
 from array_api_extra import (
     angle,
     apply_where,
@@ -42,6 +44,7 @@
 from array_api_extra import (
     searchsorted as xpx_searchsorted,
 )
+from array_api_extra._lib import _funcs as functions
 from array_api_extra._lib._backends import NUMPY_VERSION, Backend
 from array_api_extra._lib._funcs import searchsorted as _funcs_searchsorted
 from array_api_extra._lib._utils._compat import (
@@ -80,6 +83,29 @@
 lazy_xp_function(_funcs_searchsorted)
 
 
+def test_all_contains_all_public_functions():
+    public_functions = {
+        name
+        for name, obj in inspect.getmembers(functions, inspect.isfunction)
+        if not name.startswith("_") and obj.__module__ == functions.__name__
+    }
+    missing = sorted(public_functions - set(functions.__all__))
+    extra = sorted(set(functions.__all__) - public_functions)
+    assert public_functions == set(functions.__all__), (
+        f"Missing from __all__: {missing}\tExtra in __all__: {extra}"
+    )
+    public_functions = {
+        name
+        for name, obj in inspect.getmembers(delegated_func, inspect.isfunction)
+        if not name.startswith("_") and obj.__module__ == delegated_func.__name__
+    }
+    missing = sorted(public_functions - set(delegated_func.__all__))
+    extra = sorted(set(delegated_func.__all__) - public_functions)
+    assert public_functions == set(delegated_func.__all__), (
+        f"Missing from __all__: {missing}\tExtra in __all__: {extra}"
+    )
+
+
 class TestApplyWhere:
     @staticmethod
     def f1(x: Array, y: Array | int = 10) -> Array: