diff --git a/pyproject.toml b/pyproject.toml
index b1aacfe..65c53ee 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "literal-dict"
-version = "1.0.1.1"
+version = "1.1.0"
 description = "Use JavaScript-like object definition syntax in Python"
 authors = [{ name = "Muspi Merol", email = "me@muspimerol.site" }]
 dependencies = []
diff --git a/src/literal_dict.py b/src/literal_dict.py
index 359abba..de38d77 100644
--- a/src/literal_dict.py
+++ b/src/literal_dict.py
@@ -8,6 +8,7 @@
 class DictBuilder(Generic[D]):
     def __init__(self, constructor: Callable[[dict], D] = dict):
         self.constructor = constructor
+        assert callable(self.constructor), "Constructor must be callable"
 
     def __getitem__(self, args: Union[slice, T, Sequence[Union[slice, T]]]) -> D:
         if not isinstance(args, tuple):
@@ -26,18 +27,21 @@ def __getitem__(self, args: Union[slice, T, Sequence[Union[slice, T]]]) -> D:
                 obj[arg.start] = arg.stop
             else:
                 for name, var in caller_frame.f_locals.items():
-                    if var is arg:
+                    if var is arg and name not in obj:
                         obj[name] = arg
                         break
                 else:
                     for name, var in caller_frame.f_globals.items():
-                        if var is arg:
+                        if var is arg and name not in obj:
                             obj[name] = arg
                             break
                     else:
                         for name, var in caller_frame.f_builtins.items():
-                            if var is arg:
+                            if var is arg and name not in obj:
                                 obj[name] = arg
                                 break
 
         return self.constructor(obj) if self.constructor is not dict else obj  # type: ignore
+
+    def __repr__(self):
+        return f"{self.__class__.__qualname__}({self.constructor.__qualname__})"
diff --git a/test.py b/test.py
index 5a7ff61..88df951 100644
--- a/test.py
+++ b/test.py
@@ -43,3 +43,9 @@ def f():
         assert d[print] == {"print": print}
 
     f()
+
+
+def test_same_value_different_name():
+    d = DictBuilder()
+    a = b = 1
+    assert d[a, b] == {"a": 1, "b": 1}