Tests fail without any changes

[kasbah]

Just using the latest development branch (76e906e1e980050613123c29094f2ebcd30825f4).

sutest test/unittest/jsmodelertest.js

fails with

[ FAILED ] Visual.CubeTest (4 ms)
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:83:7

Full failures reported:

[ FAILED ] Visual.CubeTest (4 ms)
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:83:7
[ FAILED ] Visual.DrawingTest (4 ms)
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:100:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:101:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:102:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:103:7
[ FAILED ] Visual.CutBodyByPlaneTest (45 ms)
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:111:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:116:7
[ FAILED ] Visual.CatmullClarkSubdivisionTestCube (5 ms)
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:122:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:124:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:126:7
[ FAILED ] Visual.CatmullClarkSubdivisionTestCubeHole (5 ms)
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:132:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:134:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:136:7
[ FAILED ] Visual.CatmullClarkSubdivisionTestPrism (7 ms)
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:152:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:154:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:156:7
[ FAILED ] Visual.BooleanOperationTest (45 ms)
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:165:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:167:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:169:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:173:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:175:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:177:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:183:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:185:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:187:7
[ FAILED ] Visual.GeneratorFunctionTest (47 ms)
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:224:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:225:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:226:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:227:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:228:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:229:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:230:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:231:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:232:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:233:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:234:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:235:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:236:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:237:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:238:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:239:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:240:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:241:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:242:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:243:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:244:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:245:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:246:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:247:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:248:7
  Assert failed
   -> /home/kaspar/projects/bath/JSModeler/test/unittest/tests/visual.js:249:7
[ ------ ] Visual (162 ms)

[ FAILED ] (1033 ms)

I am on Ubuntu 16.04, maybe it's a file-system or other system issue?

Edit: sutest is version 0.1.5, in case it's that.