My project has decent code, source control with history from the beginning (ten years in a few months) and unit tests that were abandoned for years. I've spent

My project has decent code, source control with history from the beginning (ten years in a few months) and unit tests that were abandoned for years. I've spent at least a couple of weeks, over a year or so, just to remove tests that didn't test current functionality and get the others to work/be green. They ain't fast and only semi stable but they regularly find bugs we've introduced.