diff --git a/openmc/settings.py b/openmc/settings.py
index 0ad42f175e..80f679a010 100644
--- a/openmc/settings.py
+++ b/openmc/settings.py
@@ -387,8 +387,8 @@ class Settings(object):
         return self._dagmc
     
     @property
-    def event(self):
-        return self._event
+    def event_based(self):
+        return self._event_based
     
     @property
     def max_in_flight_particles(self):
diff --git a/tests/testing_harness.py b/tests/testing_harness.py
index a44b0683a0..5bd030a816 100644
--- a/tests/testing_harness.py
+++ b/tests/testing_harness.py
@@ -66,9 +66,14 @@ class TestHarness(object):
             self._cleanup()
 
     def _run_openmc(self):
-        if config['mpi']:
+        if config['mpi'] and not config['event']:
             mpi_args = [config['mpiexec'], '-n', config['mpi_np']]
             openmc.run(openmc_exec=config['exe'], mpi_args=mpi_args)
+        elif config['mpi'] and config['event']:
+            mpi_args = [config['mpiexec'], '-n', config['mpi_np']]
+            openmc.run(openmc_exec=config['exe'], mpi_args=mpi_args, event_based=True)
+        elif config['event']:
+            openmc.run(openmc_exec=config['exe'], event_based=True)
         else:
             openmc.run(openmc_exec=config['exe'])
 
diff --git a/tools/ci/travis-script.sh b/tools/ci/travis-script.sh
index 94384d5fb3..ae9b6caecb 100755
--- a/tools/ci/travis-script.sh
+++ b/tools/ci/travis-script.sh
@@ -1,17 +1,16 @@
 #!/bin/bash
 set -ex
 
-# Run regression and unit tests
+# Compile argument list
+args=" "
+
 if [[ $MPI == 'y' ]]; then
-  if [[ $EVENT == 'y' ]]; then
-    pytest --cov=openmc -v --mpi --event tests
-  else
-    pytest --cov=openmc -v --mpi tests
-  fi
-else
-  if [[ $EVENT == 'y' ]]; then
-    pytest --cov=openmc -v --event tests
-  else
-    pytest --cov=openmc -v tests
-  fi
+  args="${args} --mpi "
 fi
+  
+if [[ $EVENT == 'y' ]]; then
+  args="${args} --event "
+fi
+
+# Run regression and unit tests
+pytest --cov=openmc -v $args tests