Fix tests for invalid builds (#67)
Fix tests for invalid builds (#67)

`assert true` is a creative way to fail a test, but let's not do that.
quiltdata/quilt-compiler,quiltdata/quilt-compiler,quiltdata/quilt,quiltdata/quilt-compiler,quiltdata/quilt,quiltdata/quilt,quiltdata/quilt,quiltdata/quilt,quiltdata/quilt-compiler