diff --git a/gradio/inputs.py b/gradio/inputs.py
index 6a9a6c766e..5df840e527 100644
--- a/gradio/inputs.py
+++ b/gradio/inputs.py
@@ -16,7 +16,7 @@ class AbstractInput(ABC):
         if preprocessing_fn is not None:
             if not callable(preprocessing_fn):
                 raise ValueError('`preprocessing_fn` must be a callable function')
-            self._pre_process = preprocessing_fn
+            self._preprocess = preprocessing_fn
         super().__init__()
 
     @abstractmethod
@@ -27,9 +27,9 @@ class AbstractInput(ABC):
         pass
 
     @abstractmethod
-    def _pre_process(self, inp):
+    def _preprocess(self, inp):
         """
-        All interfaces should define a method that returns the path to its template.
+        All interfaces should define a default preprocessing method
         """
         pass
 
@@ -39,7 +39,7 @@ class Sketchpad(AbstractInput):
     def _get_template_path(self):
         return 'templates/sketchpad_input.html'
 
-    def _pre_process(self, inp):
+    def _preprocess(self, inp):
         """
         Default preprocessing method for the SketchPad is to convert the sketch to black and white and resize 28x28
         """
@@ -56,7 +56,7 @@ class Webcam(AbstractInput):
     def _get_template_path(self):
         return 'templates/webcam_input.html'
 
-    def _pre_process(self, inp):
+    def _preprocess(self, inp):
         """
         Default preprocessing method for is to convert the picture to black and white and resize to be 48x48
         """
@@ -73,7 +73,7 @@ class Textbox(AbstractInput):
     def _get_template_path(self):
         return 'templates/textbox_input.html'
 
-    def _pre_process(self, inp):
+    def _preprocess(self, inp):
         """
         By default, no pre-processing is applied to text.
         """
@@ -85,7 +85,7 @@ class ImageUpload(AbstractInput):
     def _get_template_path(self):
         return 'templates/image_upload_input.html'
 
-    def _pre_process(self, inp):
+    def _preprocess(self, inp):
         """
         Default preprocessing method for is to convert the picture to black and white and resize to be 48x48
         """
diff --git a/gradio/outputs.py b/gradio/outputs.py
index 6d239b3d56..37819a1537 100644
--- a/gradio/outputs.py
+++ b/gradio/outputs.py
@@ -12,7 +12,7 @@ class AbstractOutput(ABC):
         """
         """
         if postprocessing_fn is not None:
-            self._post_process = postprocessing_fn
+            self._postprocess = postprocessing_fn
         super().__init__()
 
     @abstractmethod
@@ -23,9 +23,9 @@ class AbstractOutput(ABC):
         pass
 
     @abstractmethod
-    def _post_process(self):
+    def _postprocess(self, prediction):
         """
-        All interfaces should define a method that returns the path to its template.
+        All interfaces should define a default postprocessing method
         """
         pass
 
@@ -35,7 +35,7 @@ class Label(AbstractOutput):
     def _get_template_path(self):
         return 'templates/label_output.html'
 
-    def _post_process(self, prediction):
+    def _postprocess(self, prediction):
         """
         """
         if isinstance(prediction, np.ndarray):
@@ -55,7 +55,7 @@ class Textbox(AbstractOutput):
     def _get_template_path(self):
         return 'templates/textbox_output.html'
 
-    def _post_process(self, prediction):
+    def _postprocess(self, prediction):
         """
         """
         return prediction
diff --git a/test/test_inputs.py b/test/test_inputs.py
index e9f4cf1291..e8ef2a6fe4 100644
--- a/test/test_inputs.py
+++ b/test/test_inputs.py
@@ -15,7 +15,7 @@ class TestSketchpad(unittest.TestCase):
 
     def test_preprocessing(self):
         inp = inputs.Sketchpad()
-        array = inp._pre_process(BASE64_IMG)
+        array = inp._preprocess(BASE64_IMG)
         self.assertEqual(array.shape, (1, 28, 28, 1))
 
 
@@ -27,7 +27,7 @@ class TestWebcam(unittest.TestCase):
 
     def test_preprocessing(self):
         inp = inputs.Webcam()
-        array = inp._pre_process(BASE64_IMG)
+        array = inp._preprocess(BASE64_IMG)
         self.assertEqual(array.shape, (1, 48, 48, 1))
 
 
@@ -39,7 +39,7 @@ class TestTextbox(unittest.TestCase):
 
     def test_preprocessing(self):
         inp = inputs.Textbox()
-        string = inp._pre_process(RAND_STRING)
+        string = inp._preprocess(RAND_STRING)
         self.assertEqual(string, RAND_STRING)
 
 
@@ -51,7 +51,7 @@ class TestImageUpload(unittest.TestCase):
 
     def test_preprocessing(self):
         inp = inputs.ImageUpload()
-        array = inp._pre_process(BASE64_IMG)
+        array = inp._preprocess(BASE64_IMG)
         self.assertEqual(array.shape, (1, 48, 48, 1))
 
 
diff --git a/test/test_outputs.py b/test/test_outputs.py
index e69de29bb2..1a97cd237b 100644
--- a/test/test_outputs.py
+++ b/test/test_outputs.py
@@ -0,0 +1,50 @@
+import numpy as np
+import unittest
+import os
+from gradio import outputs
+
+PACKAGE_NAME = 'gradio'
+
+
+class TestLabel(unittest.TestCase):
+    def test_path_exists(self):
+        out = outputs.Label()
+        path = out._get_template_path()
+        self.assertTrue(os.path.exists(os.path.join(PACKAGE_NAME, path)))
+
+    def test_postprocessing_string(self):
+        string = 'happy'
+        out = outputs.Label()
+        label = out._postprocess(string)
+        self.assertEqual(label, string)
+
+    def test_postprocessing_one_hot(self):
+        one_hot = np.array([0, 0, 0, 1, 0])
+        true_label = 3
+        out = outputs.Label()
+        label = out._postprocess(one_hot)
+        self.assertEqual(label, true_label)
+
+    def test_postprocessing_int(self):
+        true_label_array = np.array([[[3]]])
+        true_label = 3
+        out = outputs.Label()
+        label = out._postprocess(true_label_array)
+        self.assertEqual(label, true_label)
+
+
+class TestTextbox(unittest.TestCase):
+    def test_path_exists(self):
+        out = outputs.Textbox()
+        path = out._get_template_path()
+        self.assertTrue(os.path.exists(os.path.join(PACKAGE_NAME, path)))
+
+    def test_postprocessing(self):
+        string = 'happy'
+        out = outputs.Textbox()
+        string = out._postprocess(string)
+        self.assertEqual(string, string)
+
+
+if __name__ == '__main__':
+    unittest.main()