diff --git a/tests/core/contracts/test_contract_constructor_encoding.py b/tests/core/contracts/test_contract_constructor_encoding.py
index edd7383992..10e9861e23 100644
--- a/tests/core/contracts/test_contract_constructor_encoding.py
+++ b/tests/core/contracts/test_contract_constructor_encoding.py
@@ -20,6 +20,19 @@ def test_contract_constructor_abi_encoding_with_constructor_with_no_args(SimpleC
     assert deploy_data == SIMPLE_CONSTRUCTOR_CODE
 
 
+@pytest.mark.parametrize(
+    'args,kwargs',
+    (
+        (None, 'kwarg-is-ignored'),
+        ('arg-is-ignored', None),
+    ),
+)
+def test_contract_error_if_additional_args_are_supplied_with_no_constructor_fn(MathContract,
+                                                                               args, kwargs):
+    with pytest.raises(TypeError, match="Constructor args"):
+        MathContract._encode_constructor_data(args, kwargs)
+
+
 @pytest.mark.parametrize(
     'arguments',
     (
diff --git a/web3/contract.py b/web3/contract.py
index 6138bb7c17..a3c23dba9b 100644
--- a/web3/contract.py
+++ b/web3/contract.py
@@ -474,6 +474,10 @@ def _encode_constructor_data(cls, args=None, kwargs=None):
                 encode_abi(cls.web3, constructor_abi, arguments, data=cls.bytecode)
             )
         else:
+            if args is not None or kwargs is not None:
+                msg = "Constructor args were provided, but no constructor function was provided."
+                raise TypeError(msg)
+
             deploy_data = to_hex(cls.bytecode)
 
         return deploy_data