A test of the lows early on would have likely been part of the "decline pattern". Now such a test would NOT be part of the decline pattern. That is, if we test the March low, likely to be part of a genuine bear market. (Unless the market is truly bearish, it should NOT test the March low.) If so the low will not hold and market will go much lower.
The March low is significant in that if it contains declines, there is no bear market. If the March low is broken and maintained, bears will be in control. As for now, it's anybody's guess.
(As a general rule... a bull market doesn't end until a decline takes out the "prior significant low". In some cases, the notion of "last significant low" may be subjective as to which one is the "significant" one. In this case, it seems clear.... the March low.)
The March low should be any "swing player's" line in the sand. Above that price, play for "trading range or bullish". Below that price, bearish.