diff --git a/luigi/interface.py b/luigi/interface.py
index fe51e8649a..c01487fa66 100644
--- a/luigi/interface.py
+++ b/luigi/interface.py
@@ -143,6 +143,8 @@ def run(tasks, worker_scheduler_factory=None, override_defaults=None):
 
         if worker_scheduler_factory is None:
             worker_scheduler_factory = WorkerSchedulerFactory()
+        if override_defaults is None:
+            override_defaults = {}
         env_params = core(**override_defaults)
         # search for logging configuration path first on the command line, then
         # in the application config file
diff --git a/test/interface_test.py b/test/interface_test.py
index 918c52f842..398ed4ed3c 100644
--- a/test/interface_test.py
+++ b/test/interface_test.py
@@ -49,6 +49,12 @@ def test_interface_run_positive_path(self):
 
         self.assertTrue(self._run_interface())
 
+    def test_interface_default_override_defaults(self):
+        self.worker.add = Mock(side_effect=[True, True])
+        self.worker.run = Mock(return_value=True)
+
+        self.assertTrue(Interface.run([self.task_a, self.task_b], self.worker_scheduler_factory))
+
     def test_interface_run_with_add_failure(self):
         self.worker.add = Mock(side_effect=[True, False])
         self.worker.run = Mock(return_value=True)