I ALWAYS test my fabrics for bleeding, particularly reds, blacks, deep blues, etc. Everything that I use in a quilt is tested for bleeding. Fortunately, I have discovered the "bleeding" BEFORE I cut the pattern pieces. Perhaps I'm being overly cautious, but I cannot afford to ignore caution. It's a whole lot easier to test the fabrics than it is to clean up a problem later. It matters little what brand your fabrics are -- whether they're $25/yard or whatever. Dyes today are NOT organic -- they're chemical and some will bleed and when they do, it's a disaster as far as that particular quilt is concerned.