This segment ran through the standard soap and water testing for leaks in inner tubes. The primary trick to making a patch last is to completely dry the surface, rough it up well before applying the adhesive and then when the adhesive is tacky, press the patch in firmly, even rolling the edge of the patch can over the patch to push it hard into place.
The photo shows the special "tire keys" that help you to remove the tire from the rim without poking holes in the inner-tube below.