diff --git a/array_api_tests/meta/test_signatures.py b/array_api_tests/meta/test_signatures.py
index 1e34d176..f6f40a4c 100644
--- a/array_api_tests/meta/test_signatures.py
+++ b/array_api_tests/meta/test_signatures.py
@@ -1,20 +1,70 @@
-from inspect import signature
+from inspect import Parameter, Signature, signature
 
 import pytest
 
 from ..test_signatures import _test_inspectable_func
 
 
-@pytest.mark.xfail("not implemented")
-def test_kwonly():
-    def func(*, foo=None, bar=None):
-        pass
+def stub(foo, /, bar=None, *, baz=None):
+    pass
 
-    sig = signature(func)
-    _test_inspectable_func(sig, sig)
 
-    def reversed_func(*, bar=None, foo=None):
-        pass
+stub_sig = signature(stub)
 
-    reversed_sig = signature(reversed_func)
-    _test_inspectable_func(sig, reversed_sig)
+
+@pytest.mark.parametrize(
+    "sig",
+    [
+        Signature(
+            [
+                Parameter("foo", Parameter.POSITIONAL_ONLY),
+                Parameter("bar", Parameter.POSITIONAL_OR_KEYWORD),
+                Parameter("baz", Parameter.KEYWORD_ONLY),
+            ]
+        ),
+        Signature(
+            [
+                Parameter("foo", Parameter.POSITIONAL_ONLY),
+                Parameter("bar", Parameter.POSITIONAL_OR_KEYWORD),
+                Parameter("baz", Parameter.POSITIONAL_OR_KEYWORD),
+            ]
+        ),
+        pytest.param(
+            Signature(
+                [
+                    Parameter("foo", Parameter.POSITIONAL_ONLY),
+                    Parameter("bar", Parameter.POSITIONAL_OR_KEYWORD),
+                    Parameter("qux", Parameter.KEYWORD_ONLY),
+                    Parameter("baz", Parameter.KEYWORD_ONLY),
+                ]
+            ),
+            marks=pytest.mark.xfail(reason="out-of-order kwonly args not supported"),
+        ),
+    ],
+)
+def test_good_sig_passes(sig):
+    _test_inspectable_func(sig, stub_sig)
+
+
+@pytest.mark.parametrize(
+    "sig",
+    [
+        Signature(
+            [
+                Parameter("foo", Parameter.POSITIONAL_ONLY),
+                Parameter("bar", Parameter.POSITIONAL_ONLY),
+                Parameter("baz", Parameter.KEYWORD_ONLY),
+            ]
+        ),
+        Signature(
+            [
+                Parameter("foo", Parameter.POSITIONAL_ONLY),
+                Parameter("bar", Parameter.KEYWORD_ONLY),
+                Parameter("baz", Parameter.KEYWORD_ONLY),
+            ]
+        ),
+    ],
+)
+def test_raises_on_bad_sig(sig):
+    with pytest.raises(AssertionError):
+        _test_inspectable_func(sig, stub_sig)