Fix picture plugin tests
Fix picture plugin tests

jtiki/djangocms-cascade,haricot/djangocms-bs4forcascade,jtiki/djangocms-cascade,schacki/djangocms-cascade,rfleschenberg/djangocms-cascade,jrief/djangocms-cascade,jrief/djangocms-cascade,jrief/djangocms-cascade,haricot/djangocms-bs4forcascade,jtiki/djangocms-cascade,schacki/djangocms-cascade,rfleschenberg/djangocms-cascade,rfleschenberg/djangocms-cascade,schacki/djangocms-cascade