How to disable autocompletion of function signatures in spyder

When typing a function in the Spyder editor, such as fcn(, I find that Spyder often automatically barfs the entire function signature into the editor. This is especially unhelpful when instantiating a dataclass object--Spyder evidently still cannot read the dataclass fields--and even less helpful when using annotations, which I do frequently. How do I disable this feature? I'm using Spyder 4.1.1.