diff --git a/jedi/evaluate/param.py b/jedi/evaluate/param.py
index 8913b88c..14cb0bad 100644
--- a/jedi/evaluate/param.py
+++ b/jedi/evaluate/param.py
@@ -72,7 +72,7 @@ def get_params(evaluator, func, var_args):
         result.append(self_name)
 
     param_dict = {}
-    for param in func.params:
+    for param in func.params[start_offset:]:
         param_dict[str(param.get_name())] = param
     # There may be calls, which don't fit all the params, this just ignores it.
     va = _unpack_var_args(evaluator, var_args, func)
@@ -127,14 +127,12 @@ def get_params(evaluator, func, var_args):
                     break
                 lst_values.append(va_values)
             if lst_values[0]:
-#print('args', lst_values[0][0].parent.start_pos)
                 values = [helpers.stmts_to_stmt(v) for v in lst_values]
         elif param.stars == 2:
             # **kwargs param
             array_type = pr.Array.DICT
             if non_matching_keys:
                 keys, values = zip(*non_matching_keys)
-# print('kw', values[0][0].parent.start_pos)
                 values = [helpers.stmts_to_stmt(list(v)) for v in values]
             non_matching_keys = []
         else:
diff --git a/test/static_analysis/arguments.py b/test/static_analysis/arguments.py
index 59c9c06a..d2d6784c 100644
--- a/test/static_analysis/arguments.py
+++ b/test/static_analysis/arguments.py
@@ -55,3 +55,19 @@ default(1, 2, 3)
 default(1, 2, 3, 4)
 
 default(x=1)
+
+# -----------------
+# class arguments
+# -----------------
+
+class Instance():
+    def __init__(self, foo):
+        self.foo = foo
+
+Instance(1).foo
+Instance(foo=1).foo
+
+#! 12 type-error-too-many-arguments
+Instance(1, 2).foo
+#! 8 type-error-too-few-arguments
+Instance().foo