Amorphous silicon triple-junction solar cells were tested in tension and compression. The production cells had the structure: stainless steel (125 mum)/Al/ZnO/n(1)i(1)p(1)n(2)i(2)p(2)n(3)i(3)p(3)/ITO/grid, where i(1) and i(2) are a-SiGe:H and i(3) is a-Si:H [2,3]. We bent the solar cells to strains as high as 2%. The I-V characteristics of the cells were tested before, during and after bending. We found that there was little deterioration in cell performance under compression up to 1.7% strain, which is the physical limit of our experiment. In tension, some cell characteristics began to degrade at strains of 0.75%. Plastic deformation was observed at strains of 0.2% and higher.