diff --git a/contact_map/contact_map.py b/contact_map/contact_map.py
index f765e0c..7c145f1 100644
--- a/contact_map/contact_map.py
+++ b/contact_map/contact_map.py
@@ -70,6 +70,7 @@ def _atom_slice(traj, indices):
                          unitcell_lengths=unitcell_lengths,
                          unitcell_angles=unitcell_angles)
 
+
 def _residue_for_atom(topology, atom_list):
     return set([topology.atom(a).residue for a in atom_list])
 
@@ -197,7 +198,7 @@ def _set_atom_idx_to_residue_idx(self):
     def s_idx_to_idx(self, idx):
         """function to convert a sliced atom index back to real index"""
         if self._use_atom_slice:
-            return(self._all_atoms[idx])
+            return self._all_atoms[idx]
         else:
             return idx
 
@@ -740,8 +741,7 @@ def __init__(self, trajectory, query=None, haystack=None, cutoff=0.45,
                                                query, haystack, cutoff,
                                                n_neighbors_ignored)
         contacts = self._build_contact_map(trajectory)
-        (atom_contacts, self._residue_contacts) = contacts
-        self._atom_contacts = self.convert_atom_contacts(atom_contacts)
+        (self._atom_contacts, self._residue_contacts) = contacts
 
     def __hash__(self):
         return hash((super(ContactFrequency, self).__hash__(),
@@ -777,7 +777,6 @@ def _build_contact_map(self, trajectory):
         residue_query_atom_idxs = self.residue_query_atom_idxs
 
         used_trajectory = self.slice_trajectory(trajectory)
-
         for frame_num in self.frames:
             frame_contacts = self.contact_map(used_trajectory, frame_num,
                                               residue_query_atom_idxs,
@@ -787,7 +786,7 @@ def _build_contact_map(self, trajectory):
             # self._atom_contacts_count += frame_atom_contacts
             atom_contacts_count.update(frame_atom_contacts)
             residue_contacts_count += frame_residue_contacts
-
+        atom_contacts_count = self.convert_atom_contacts(atom_contacts_count)
         return (atom_contacts_count, residue_contacts_count)
 
     @property
diff --git a/contact_map/tests/test_dask_runner.py b/contact_map/tests/test_dask_runner.py
index f630c13..3776812 100644
--- a/contact_map/tests/test_dask_runner.py
+++ b/contact_map/tests/test_dask_runner.py
@@ -1,10 +1,10 @@
-
 # pylint: disable=wildcard-import, missing-docstring, protected-access
 # pylint: disable=attribute-defined-outside-init, invalid-name, no-self-use
 # pylint: disable=wrong-import-order, unused-wildcard-import
 
 from .utils import *
 from contact_map.dask_runner import *
+from contact_map import ContactFrequency
 
 def dask_setup_test_cluster(distributed, n_workers=4, n_attempts=3):
     """Set up a test cluster using dask.distributed. Try up to n_attempts
@@ -40,3 +40,30 @@ def test_dask_integration(self):
                                          n_neighbors_ignored=0)
         client.close()
         assert dask_freq.n_frames == 5
+
+    def test_dask_atom_slice(self):
+        # This is an integration test to check that dask works with atom_slice
+        dask = pytest.importorskip('dask')  # pylint: disable=W0612
+        distributed = pytest.importorskip('dask.distributed')
+        # Explicitly set only 4 workers on Travis instead of 31
+        # Fix copied from https://github.com/spencerahill/aospy/pull/220/files
+        cluster = dask_setup_test_cluster(distributed, n_workers=4)
+        client = distributed.Client(cluster)
+        filename = find_testfile("trajectory.pdb")
+
+        dask_freq0 = DaskContactFrequency(client, filename, query=[3, 4],
+                                          haystack=[6, 7], cutoff=0.075,
+                                          n_neighbors_ignored=0)
+        client.close()
+        assert dask_freq0.n_frames == 5
+        client = distributed.Client(cluster)
+        # Set the slicing of contact frequency (used in the frqeuency task)
+        # to False
+        ContactFrequency._class_use_atom_slice = False
+        dask_freq1 = DaskContactFrequency(client, filename, query=[3, 4],
+                                          haystack=[6, 7], cutoff=0.075,
+                                          n_neighbors_ignored=0)
+        client.close()
+        assert dask_freq0._use_atom_slice is True
+        assert dask_freq1._use_atom_slice is False
+        assert dask_freq0 == dask_freq1