fix unit tests

Author: kain88-de

testsuite/MDAnalysisTests/coordinates/test_dcd.py

@@ -169,7 +169,7 @@ def _slice_generation_test(self, start, stop, step):
         self.u = mda.Universe(PSF, DCD)
         ts = self.u.trajectory.timeseries(self.u.atoms)
         ts_skip = self.u.trajectory.timeseries(self.u.atoms, start, stop, step)
-        assert_array_almost_equal(ts[start:stop:step], ts_skip, 5)
+        assert_array_almost_equal(ts[:,start:stop:step], ts_skip, 5)
 
     # @knownfailure
     # def _failed_slices_test(self, start, stop, step):