also use signed labels in test
also use signed labels in test

xiwei-zhang/vigra,funkey/vigra,mmuellner/vigra,kod3r/vigra,dstoe/vigra,timoMa/vigra,kod3r/vigra,stuarteberg/vigra,cha007/vigra,capturePointer/vigra,cha007/vigra,ThomasWalter/vigra,stuarteberg/vigra,capturePointer/vigra,stuarteberg/vigra,hmeine/vigra,dstoe/vigra,timoMa/vigra,dagophil/vigra,dstoe/vigra,stuarteberg/vigra,funkey/vigra,dagophil/vigra,mmuellner/vigra,kod3r/vigra,capturePointer/vigra,timoMa/vigra,stuarteberg/vigra,funkey/vigra,ThomasWalter/vigra,capturePointer/vigra,dagophil/vigra,dstoe/vigra,cha007/vigra,xiwei-zhang/vigra,kod3r/vigra,capturePointer/vigra,xiwei-zhang/vigra,capturePointer/vigra,mmuellner/vigra,stuarteberg/vigra,dstoe/vigra,cha007/vigra,hmeine/vigra,mmuellner/vigra,timoMa/vigra,xiwei-zhang/vigra,dagophil/vigra,kod3r/vigra,hmeine/vigra,mmuellner/vigra,kod3r/vigra,hmeine/vigra,timoMa/vigra,ThomasWalter/vigra,cha007/vigra,xiwei-zhang/vigra,mmuellner/vigra,ThomasWalter/vigra,ThomasWalter/vigra,ThomasWalter/vigra,stuarteberg/vigra,dagophil/vigra,kod3r/vigra,ThomasWalter/vigra,xiwei-zhang/vigra,hmeine/vigra,funkey/vigra,xiwei-zhang/vigra,hmeine/vigra,cha007/vigra,mmuellner/vigra,dstoe/vigra,cha007/vigra,dagophil/vigra,dstoe/vigra,hmeine/vigra,timoMa/vigra,funkey/vigra,dagophil/vigra,funkey/vigra,funkey/vigra,timoMa/vigra,capturePointer/vigra