diff --git a/gradio/components/gallery.py b/gradio/components/gallery.py
index 965f4fb099ae..a963276f9cf8 100644
--- a/gradio/components/gallery.py
+++ b/gradio/components/gallery.py
@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 from pathlib import Path
-from typing import Any, Callable, List, Literal, Optional
+from typing import Any, Callable, List, Literal, Optional, Tuple, Union
 from urllib.parse import urlparse
 
 import numpy as np
@@ -28,6 +28,10 @@ class GalleryData(GradioRootModel):
     root: List[GalleryImage]
 
 
+GalleryImageType = Union[np.ndarray, _Image.Image, Path, str]
+CaptionedGalleryImageType = Tuple[GalleryImageType, str]
+
+
 @document()
 class Gallery(Component):
     """
@@ -126,9 +130,7 @@ def __init__(
 
     def postprocess(
         self,
-        value: list[np.ndarray | _Image.Image | str]
-        | list[tuple[np.ndarray | _Image.Image | str, str]]
-        | None,
+        value: list[GalleryImageType | CaptionedGalleryImageType] | None,
     ) -> GalleryData:
         """
         Parameters:
diff --git a/js/app/test/gallery_component_events.spec.ts b/js/app/test/gallery_component_events.spec.ts
index bc675f12b30a..d848e576fc49 100644
--- a/js/app/test/gallery_component_events.spec.ts
+++ b/js/app/test/gallery_component_events.spec.ts
@@ -1,24 +1,27 @@
 import { test, expect } from "@gradio/tootils";
 
+const regexLocalHostFileURL = (basename: string) =>
+	new RegExp(`^http://localhost:7860/(\\w+/)*file=(.*\\/)?${basename}$`);
+
 test("Gallery preview mode displays all images correctly.", async ({
 	page
 }) => {
 	await page.getByRole("button", { name: "Run" }).click();
 	await page.getByLabel("Thumbnail 2 of 3").click();
 
-	await expect(
-		await page.getByTestId("detailed-image").getAttribute("src")
-	).toEqual("https://gradio-builds.s3.amazonaws.com/assets/lite-logo.png");
+	expect(await page.getByTestId("detailed-image").getAttribute("src")).toMatch(
+		regexLocalHostFileURL("lite-logo.png")
+	);
 
-	await expect(
-		await page.getByTestId("thumbnail 1").getAttribute("src")
-	).toEqual("https://gradio-builds.s3.amazonaws.com/assets/cheetah-003.jpg");
+	expect(await page.getByTestId("thumbnail 1").getAttribute("src")).toMatch(
+		regexLocalHostFileURL("cheetah-003.jpg")
+	);
 });
 
 test("Gallery select event returns the right value", async ({ page }) => {
 	await page.getByRole("button", { name: "Run" }).click();
 	await page.getByLabel("Thumbnail 2 of 3").click();
 	await expect(page.getByLabel("Select Data")).toHaveValue(
-		"https://gradio-builds.s3.amazonaws.com/assets/lite-logo.png"
+		regexLocalHostFileURL("lite-logo.png")
 	);
 });