diff --git a/neat/locals/collector.py b/neat/locals/collector.py
index be7f90e..dbd4fa0 100644
--- a/neat/locals/collector.py
+++ b/neat/locals/collector.py
@@ -279,7 +279,8 @@ def execute(config, state):
                              host_cpu_mhz)
         if log.isEnabledFor(logging.DEBUG):
             log.debug('Collected VM data: %s', str(cpu_mhz))
-            log.debug('Overall host utilization: %s', str(host_cpu_mhz / state['physical_cpu_mhz']))
+            log.debug('Overall host utilization: %s', 
+                      str(float(host_cpu_mhz) / state['physical_cpu_mhz']))
             log.debug('Collected host CPU MHz: %s', str(host_cpu_mhz))
             log.debug('Collected VM CPU MHz: %s', str(sum(cpu_mhz.values())))
             log.debug('Collected host - VMs CPU MHz: %s', str(host_cpu_mhz - sum(cpu_mhz.values())))
diff --git a/tests/locals/test_collector.py b/tests/locals/test_collector.py
index fe624d2..54d0b38 100644
--- a/tests/locals/test_collector.py
+++ b/tests/locals/test_collector.py
@@ -485,7 +485,7 @@ class Collector(TestCase):
             context = mock('context')
             f = mock('file')
             when(context).__enter__().and_return(f)#.once()
-            when(context).__exit__()
+            when(context).__exit__.and_return(True)
             when(collector).open('/proc/stat', 'r').and_return(context)#.once()
             when(f).readline().and_return(
                 '1 ' + ' '.join([str(v) for v in x]) + ' 2 3')#.once()