diff --git a/homeassistant/components/vizio/config_flow.py b/homeassistant/components/vizio/config_flow.py
index c62222f2d91..cde84a6a9e2 100644
--- a/homeassistant/components/vizio/config_flow.py
+++ b/homeassistant/components/vizio/config_flow.py
@@ -180,8 +180,11 @@ class VizioConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
                 if entry.data[CONF_NAME] != import_config[CONF_NAME]:
                     updated_name[CONF_NAME] = import_config[CONF_NAME]
 
-                if entry.data[CONF_VOLUME_STEP] != import_config[CONF_VOLUME_STEP]:
-                    updated_options[CONF_VOLUME_STEP] = import_config[CONF_VOLUME_STEP]
+                import_volume_step = import_config.get(
+                    CONF_VOLUME_STEP, DEFAULT_VOLUME_STEP
+                )
+                if entry.data.get(CONF_VOLUME_STEP) != import_volume_step:
+                    updated_options[CONF_VOLUME_STEP] = import_volume_step
 
                 if updated_options or updated_name:
                     new_data = entry.data.copy()
diff --git a/tests/components/vizio/test_config_flow.py b/tests/components/vizio/test_config_flow.py
index 416617d4b9b..2dd32800c2d 100644
--- a/tests/components/vizio/test_config_flow.py
+++ b/tests/components/vizio/test_config_flow.py
@@ -300,15 +300,15 @@ async def test_import_flow_update_options(
     result = await hass.config_entries.flow.async_init(
         DOMAIN,
         context={"source": SOURCE_IMPORT},
-        data=vol.Schema(VIZIO_SCHEMA)(MOCK_IMPORT_VALID_TV_CONFIG),
+        data=vol.Schema(VIZIO_SCHEMA)(MOCK_SPEAKER_CONFIG),
     )
     await hass.async_block_till_done()
 
-    assert result["result"].options == {CONF_VOLUME_STEP: VOLUME_STEP}
+    assert result["result"].options == {CONF_VOLUME_STEP: DEFAULT_VOLUME_STEP}
     assert result["type"] == data_entry_flow.RESULT_TYPE_CREATE_ENTRY
     entry_id = result["result"].entry_id
 
-    updated_config = MOCK_IMPORT_VALID_TV_CONFIG.copy()
+    updated_config = MOCK_SPEAKER_CONFIG.copy()
     updated_config[CONF_VOLUME_STEP] = VOLUME_STEP + 1
     result = await hass.config_entries.flow.async_init(
         DOMAIN,