When shape-outside is modified dynamically, content affected by the shape's contour should relayout. For each test, you should see green blocks separated by white space, wrapping around a blue square in the upper left. This test requires the Ahem font.

Setting shape-outside with no prior entry

x x x x x x x x x x

Setting shape-outside with a prior entry

x x x x x x x x x x

Removing shape-outside with a prior entry

x x x x x x x x x x