diff --git a/gradio/components.py b/gradio/components.py
index ee204663c9..a42d8d66c2 100644
--- a/gradio/components.py
+++ b/gradio/components.py
@@ -2097,6 +2097,8 @@ class Dataframe(Component):
                 dtype = "numpy"
             elif isinstance(y, list):
                 dtype = "array"
+            else:
+                raise ValueError("Cannot determine the type of DataFrame output.")
         else:
             dtype = self.output_type
         if dtype == "pandas":
diff --git a/gradio/interface.py b/gradio/interface.py
index 18688a42e3..a698bdb335 100644
--- a/gradio/interface.py
+++ b/gradio/interface.py
@@ -18,8 +18,8 @@ from markdown_it import MarkdownIt
 from mdit_py_plugins.footnote import footnote_plugin
 
 from gradio import interpretation, utils
-from gradio.blocks import BlockContext, Column, Row
-from gradio.components import Button, Component, Markdown, get_component_instance
+from gradio.components import Component, get_component_instance, Markdown, Button
+from gradio.blocks import BlockContext, Row, Column
 from gradio.external import load_from_pipeline, load_interface  # type: ignore
 from gradio.flagging import CSVLogger, FlaggingCallback  # type: ignore
 from gradio.inputs import State as i_State  # type: ignore
diff --git a/test/test_outputs.py b/test/test_outputs.py
index e84801728e..b17bee7c18 100644
--- a/test/test_outputs.py
+++ b/test/test_outputs.py
@@ -2,6 +2,7 @@ import os
 import tempfile
 import unittest
 
+import json
 import matplotlib.pyplot as plt
 import numpy as np
 import pandas as pd
@@ -12,18 +13,13 @@ os.environ["GRADIO_ANALYTICS_ENABLED"] = "False"
 
 
 class TestTextbox(unittest.TestCase):
-    def test_as_component(self):
-        with self.assertRaises(ValueError):
-            wrong_type = gr.outputs.Textbox(type="unknown")
-            wrong_type.postprocess(0)
-
     def test_in_interface(self):
         iface = gr.Interface(lambda x: x[-1], "textbox", gr.outputs.Textbox())
         self.assertEqual(iface.process(["Hello"])[0], ["o"])
         iface = gr.Interface(
-            lambda x: x / 2, "number", gr.outputs.Textbox(type="number")
+            lambda x: x / 2, "number", gr.outputs.Textbox()
         )
-        self.assertEqual(iface.process([10])[0], [5])
+        self.assertEqual(iface.process([10])[0], ['5.0'])
 
 
 class TestLabel(unittest.TestCase):
@@ -79,9 +75,6 @@ class TestLabel(unittest.TestCase):
                     ],
                 },
             )
-        with self.assertRaises(ValueError):
-            label_output = gr.outputs.Label(type="unknown")
-            label_output.deserialize([1, 2, 3])
 
     def test_in_interface(self):
         x_img = gr.test_data.BASE64_IMAGE
@@ -239,21 +232,21 @@ class TestAudio(unittest.TestCase):
             )
         )
         self.assertEqual(
-            audio_output.get_template_context(), {"name": "audio", "label": None}
+            audio_output.get_template_context(), {"name": "audio", 
+                                                  "label": None,
+                                                  "source": "upload",
+                                                  "css": {}}
         )
-        with self.assertRaises(ValueError):
-            wrong_type = gr.outputs.Audio(type="unknown")
-            wrong_type.postprocess(y_audio.name)
         self.assertTrue(
             audio_output.deserialize(gr.test_data.BASE64_AUDIO["data"]).endswith(".wav")
         )
         with tempfile.TemporaryDirectory() as tmpdirname:
             to_save = audio_output.save_flagged(
-                tmpdirname, "audio_output", gr.test_data.BASE64_AUDIO["data"], None
+                tmpdirname, "audio_output", gr.test_data.BASE64_AUDIO, None
             )
             self.assertEqual("audio_output/0.wav", to_save)
             to_save = audio_output.save_flagged(
-                tmpdirname, "audio_output", gr.test_data.BASE64_AUDIO["data"], None
+                tmpdirname, "audio_output", gr.test_data.BASE64_AUDIO, None
             )
             self.assertEqual("audio_output/1.wav", to_save)
 
@@ -331,11 +324,11 @@ class TestFile(unittest.TestCase):
         file_output = gr.outputs.File()
         with tempfile.TemporaryDirectory() as tmpdirname:
             to_save = file_output.save_flagged(
-                tmpdirname, "file_output", gr.test_data.BASE64_FILE, None
+                tmpdirname, "file_output", [gr.test_data.BASE64_FILE], None
             )
             self.assertEqual("file_output/0", to_save)
             to_save = file_output.save_flagged(
-                tmpdirname, "file_output", gr.test_data.BASE64_FILE, None
+                tmpdirname, "file_output", [gr.test_data.BASE64_FILE], None
             )
             self.assertEqual("file_output/1", to_save)
 
@@ -363,7 +356,14 @@ class TestDataframe(unittest.TestCase):
                 "overflow_row_behaviour": "paginate",
                 "name": "dataframe",
                 "label": None,
-                "css": {}
+                "css": {},
+                "datatype": "str",
+                "row_count": 3,
+                "col_count": 3,
+                "col_width": None,
+                "default": [[None, None, None], [None, None, None], [None, None, None]],
+                "name": "dataframe",
+                
             },
         )
         with self.assertRaises(ValueError):
@@ -373,11 +373,14 @@ class TestDataframe(unittest.TestCase):
             to_save = dataframe_output.save_flagged(
                 tmpdirname, "dataframe_output", output, None
             )
-            self.assertEqual(to_save, "[[2, true], [3, true], [4, false]]")
+            self.assertEqual(to_save, json.dumps({
+                "headers": ["num", "prime"],
+                "data": [[2, True], [3, True], [4, False]]
+                }))
             self.assertEqual(
                 dataframe_output.restore_flagged(tmpdirname, to_save, None),
-                {"data": [[2, True], [3, True], [4, False]]},
-            )
+                {"headers": ["num", "prime"],
+                "data": [[2, True], [3, True], [4, False]]})
 
     def test_in_interface(self):
         def check_odd(array):
@@ -413,7 +416,10 @@ class TestCarousel(unittest.TestCase):
         self.assertEqual(
             carousel_output.get_template_context(),
             {
-                "components": [{"name": "textbox", "label": None}],
+                "components": [
+                    {"name": "textbox", "label": None, "default": "", "lines": 1,
+                     "css": {}, 'placeholder': None}
+                ],
                 "name": "carousel",
                 "label": "Disease",
                 "css": {}