Showcase of the consistency tests possible with the OneCovariance code. This is a cosmic shear setting as in KiDS-1000 (Asgari et al. 2021b) (i.e. five tomographic bins, eight band power bins, five modes for COSEBIs, and nine bins for ξ_±. The code was used to create the full covariance matrix for any pair of those three statistics. Since these are all summary statistics for the same tracer and almost over the same physical scales, the matrix is close to being singular. The full matrix shown here has a single negative eigenvalue originating from numerical noise. However, the subcovariance matrices between each pair of summary statistics are still positive-definite. We do not show the B modes for COSEBIs and bandpowers since they mainly consist of shape noise (although they are still highly correlated with the shape noise of the other statistics).