diff --git a/Lib/test/test_capi/test_abstract.py b/Lib/test/test_capi/test_abstract.py
index eeaef60a8b4..687ce1e6376 100644
--- a/Lib/test/test_capi/test_abstract.py
+++ b/Lib/test/test_capi/test_abstract.py
@@ -817,6 +817,13 @@ class CAPITest(unittest.TestCase):
         self.assertRaises(TypeError, xtuple, 42)
         self.assertRaises(SystemError, xtuple, NULL)
 
+    def test_number_check(self):
+        number_check = _testcapi.number_check
+        self.assertTrue(number_check(1 + 1j))
+        self.assertTrue(number_check(1))
+        self.assertTrue(number_check(0.5))
+        self.assertFalse(number_check("1 + 1j"))
+
 
 if __name__ == "__main__":
     unittest.main()
diff --git a/Modules/_testcapi/abstract.c b/Modules/_testcapi/abstract.c
index a93477a7090..4a9144e66f0 100644
--- a/Modules/_testcapi/abstract.c
+++ b/Modules/_testcapi/abstract.c
@@ -180,6 +180,12 @@ object_delattrstring(PyObject *self, PyObject *args)
     RETURN_INT(PyObject_DelAttrString(obj, attr_name));
 }
 
+static PyObject *
+number_check(PyObject *self, PyObject *obj)
+{
+    NULLABLE(obj);
+    return PyBool_FromLong(PyNumber_Check(obj));
+}
 
 static PyObject *
 mapping_check(PyObject *self, PyObject *obj)
@@ -623,6 +629,7 @@ static PyMethodDef test_methods[] = {
     {"object_delattr", object_delattr, METH_VARARGS},
     {"object_delattrstring", object_delattrstring, METH_VARARGS},
 
+    {"number_check", number_check, METH_O},
     {"mapping_check", mapping_check, METH_O},
     {"mapping_size", mapping_size, METH_O},
     {"mapping_length", mapping_length, METH_O},