diff --git a/octoprint/cura/__init__.py b/octoprint/cura/__init__.py
index a9df95b7..54c7685d 100644
--- a/octoprint/cura/__init__.py
+++ b/octoprint/cura/__init__.py
@@ -29,7 +29,9 @@ class CuraEngine(object):
 		logging.info('CuraEngine Created')
 
 
-	def process_file(self, config, gcode, file_path, call_back, call_back_args):
+	def process_file(
+			self, config, gcode, file_path, call_back=None, 
+			call_back_args=None):
 		"""Wraps around the main.cpp processFile method.
 		:param config: :class: `string` :path to a cura config file:
 		:param gcode: :class: `string :path to write out the gcode generated:
diff --git a/octoprint/cura/tests/test_cura.py b/octoprint/cura/tests/test_cura.py
index a75f507f..791d4e7d 100644
--- a/octoprint/cura/tests/test_cura.py
+++ b/octoprint/cura/tests/test_cura.py
@@ -9,12 +9,12 @@ from octoprint.cura import CuraEngine
 class CuraFactoryTestCase(unittest.TestCase):
 
 
-    def test_cura_factory(self):
+	def test_cura_factory(self):
 
-        fake_path = 'my/temp/path'
-        result = CuraFactory.create_slicer(fake_path)
+		fake_path = 'my/temp/path'
+		result = CuraFactory.create_slicer(fake_path)
 
-        self.assertEqual(fake_path, result.cura_path)
+		self.assertEqual(fake_path, result.cura_path)
 
 
 	@patch('threading.Thread')
@@ -29,6 +29,5 @@ class CuraFactoryTestCase(unittest.TestCase):
 		args = [path, '-s', config_path, '-o', file_path]
 		
 		cura_engine.process_file(config_path, gcode_filename, file_path)
-
 		self.assertTrue(thread.called)
 
diff --git a/octoprint/gcodefiles.py b/octoprint/gcodefiles.py
index 930e88aa..1275f470 100644
--- a/octoprint/gcodefiles.py
+++ b/octoprint/gcodefiles.py
@@ -128,7 +128,6 @@ class GcodeManager:
 		file.save(absolutePath)
 		filename = file.filename
 
-
 		if isGcodeFileName(filename):
 			return self.processGcode(absolutePath)
 
@@ -143,7 +142,6 @@ class GcodeManager:
 				filename, absolutePath, callBack, callBackArgs)
 
 	def processSTL(self, filename, absolutePath, callBack, callBackArgs):
-
 		from octoprint.cura import CuraFactory
 
 		curaEngine = CuraFactory.create_slicer()
@@ -157,7 +155,6 @@ class GcodeManager:
 			config, gcodePath, absolutePath, callBack, callBackArgs)
 
 	def processGcode(self, absolutePath):
-
 		filename = self._getBasicFilename(absolutePath)
 
 		if filename in self._metadata.keys():
diff --git a/octoprint/printer.py b/octoprint/printer.py
index d027d38b..55c9b2d1 100644
--- a/octoprint/printer.py
+++ b/octoprint/printer.py
@@ -487,7 +487,6 @@ class Printer():
 				filename, absolutePath, callBack, callBackArgs)
 
 	def streamSdFile(filename, absolutePath):
-
 		self._sdStreamer = SdFileStreamer(self._comm, filename, absolutePath, self._onSdFileStreamProgress, self._onSdFileStreamFinish)
 		self._sdStreamer.start()
 		logging.info("Stream file to SD started")
diff --git a/octoprint/server.py b/octoprint/server.py
index 58d085c0..661cd8fd 100644
--- a/octoprint/server.py
+++ b/octoprint/server.py
@@ -509,7 +509,6 @@ def setSettings():
 		curaEngine = data.get("curaEngine", None)
 
 		if curaEngine:
-			
 			path = curaEngine.get("path")
 			if path:
 				s.set(["curaEngine", "path"], path)
diff --git a/octoprint/tests/test_server.py b/octoprint/tests/test_server.py
deleted file mode 100644
index 22589b4c..00000000
--- a/octoprint/tests/test_server.py
+++ /dev/null
@@ -1,9 +0,0 @@
-import unittest
-
-
-class FileManipulationTestCase(unittest.TestCase):
-
-
-	def test_simple(self):
-
-		self.assertTrue(True)