--- a
+++ b/tests/utils/test_bindings.py
@@ -0,0 +1,40 @@
+import pytest
+from confit import validate_arguments
+from confit.errors import ConfitValidationError
+
+from edsnlp.utils.bindings import BINDING_GETTERS, BINDING_SETTERS, AttributesArg
+
+
+def test_qualifier_validation():
+    @validate_arguments
+    def fn(arg: AttributesArg):
+        return arg
+
+    assert fn("_.negated") == {"_.negated": True}
+    assert fn(["_.negated", "_.event"]) == {"_.negated": True, "_.event": True}
+    assert fn({"_.negated": True, "_.event": "DATE"}) == {
+        "_.negated": True,
+        "_.event": ["DATE"],
+    }
+
+    callback = lambda x: x  # noqa: E731
+
+    assert fn(callback) is callback
+
+    with pytest.raises(ConfitValidationError):
+        fn(1)
+
+    with pytest.raises(ConfitValidationError):
+        fn({"_.negated": 1})
+
+
+def test_bindings():
+    class custom:
+        def __init__(self, value):
+            self.value = value
+
+    obj = custom([custom(1), custom(2)])
+    assert BINDING_GETTERS["value[0].value"](obj) == 1
+    assert BINDING_GETTERS[("value[0].value", 1)](obj) is True
+    BINDING_SETTERS[("value[1].value", 3)](obj)
+    assert obj.value[1].value == 3