fix restapi compute list  unit test
diff --git a/src/emuvim/api/rest/compute.py b/src/emuvim/api/rest/compute.py
index 1082a4d..030055e 100755
--- a/src/emuvim/api/rest/compute.py
+++ b/src/emuvim/api/rest/compute.py
@@ -109,7 +109,7 @@
     def get(self, dc_label=None):
         logging.debug("API CALL: compute list")
         try:
-            if dc_label is None:
+            if dc_label is None or dc_label == 'None':
                 # return list with all compute nodes in all DCs
                 all_containers = []
                 for dc in dcs.itervalues():