diff --git a/package-lock.json b/package-lock.json
index 34929af007..2d99e33b29 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16682,9 +16682,9 @@
             }
         },
         "node_modules/svelte-sonner": {
-            "version": "1.1.1",
-            "resolved": "https://registry.npmjs.org/svelte-sonner/-/svelte-sonner-1.1.1.tgz",
-            "integrity": "sha512-5cd3p7wa4cq0NsqslMwdlPb7x1JglEZ/GKrLePWNr5bCxR1nagAVrY01FRFrXfUGs41miLt3C327+8XJo5BzZw==",
+            "version": "1.2.1",
+            "resolved": "https://registry.npmjs.org/svelte-sonner/-/svelte-sonner-1.2.1.tgz",
+            "integrity": "sha512-N00LOWb60fjKXULbpngku+7E9Krb16KpNq4/Eax5Vu7o1Dpbca55QpaLPsB+yp82JIEdFhfJuv5cVXLoe0ZtVA==",
             "license": "MIT",
             "dependencies": {
                 "runed": "^0.28.0"
@@ -18674,7 +18674,7 @@
                 "@stackoverflow/stacks-utils": "^1.0.0",
                 "clsx": "^2.1.1",
                 "svelte-floating-ui": "^1.6.2",
-                "svelte-sonner": "^1.1.1"
+                "svelte-sonner": "^1.2.1"
             },
             "peerDependencies": {
                 "@stackoverflow/stacks": "^3.0.0",
diff --git a/packages/stacks-svelte/package.json b/packages/stacks-svelte/package.json
index 20871b6409..e5e76fceb2 100644
--- a/packages/stacks-svelte/package.json
+++ b/packages/stacks-svelte/package.json
@@ -40,7 +40,7 @@
         "@stackoverflow/stacks-icons-legacy": "npm:@stackoverflow/stacks-icons@^6.9.0",
         "@stackoverflow/stacks-utils": "^1.0.0",
         "svelte-floating-ui": "^1.6.2",
-        "svelte-sonner": "^1.1.1"
+        "svelte-sonner": "^1.2.1"
     },
     "files": [
         "lib",
diff --git a/packages/stacks-svelte/src/components/Toast/Toast.test.ts b/packages/stacks-svelte/src/components/Toast/Toast.test.ts
index ead25580e0..9158fcdc59 100644
--- a/packages/stacks-svelte/src/components/Toast/Toast.test.ts
+++ b/packages/stacks-svelte/src/components/Toast/Toast.test.ts
@@ -2,12 +2,29 @@ import { expect } from "@open-wc/testing";
 import { render, screen, waitFor } from "@testing-library/svelte";
 import userEvent from "@testing-library/user-event";
 import sinon from "sinon";
+import { toast } from "svelte-sonner";
 import { createRawSnippet, mount, unmount } from "svelte";
 import NoticeAction from "../Notice/NoticeAction.svelte";
 
 import Toaster, { showToast, hideToast } from "./Toast.svelte";
 
+async function dismissToasts() {
+    try {
+        // Dismiss while the Toaster is mounted, before automatic DOM cleanup.
+        toast.dismiss();
+        await waitFor(
+            () =>
+                expect(document.querySelector("[data-sonner-toast]")).to.not
+                    .exist
+        );
+    } finally {
+        sinon.restore();
+    }
+}
+
 describe("showToast", () => {
+    afterEach(dismissToasts);
+
     it("should render a default toast component", async () => {
         render(Toaster);
         showToast("Test Toast");
@@ -65,7 +82,6 @@ describe("showToast", () => {
         await waitFor(
             () => expect(screen.queryByText("Test Toast")).to.not.exist
         );
-        clock.restore();
     });
 
     it("should never close automatically when transient is false", async () => {
@@ -78,7 +94,6 @@ describe("showToast", () => {
         await waitFor(() => expect(screen.getByText("Test Toast")).to.exist);
         await clock.tickAsync(15000);
         expect(screen.getByText("Test Toast")).to.exist;
-        clock.restore();
     });
 
     it("should close the toast based on the duration option when provided", async () => {
@@ -93,7 +108,6 @@ describe("showToast", () => {
         await waitFor(
             () => expect(screen.queryByText("Test Toast")).to.not.exist
         );
-        clock.restore();
     });
 
     it("should render other actions in the toast when provided", async () => {
@@ -148,7 +162,6 @@ describe("showToast", () => {
         expect(onCloseSpy).to.have.been.called;
         expect(onAutoCloseSpy).to.have.been.called;
         expect(onUserCloseSpy).to.not.have.been.called;
-        clock.restore();
     });
 
     it("should call onClose and onUserClose callbacks when the toast is closed by the user", async () => {
@@ -192,6 +205,8 @@ describe("showToast", () => {
 });
 
 describe("hideToast", () => {
+    afterEach(dismissToasts);
+
     it("should close a toast programmatically", async () => {
         render(Toaster);
         const toastId = showToast("Test Toast", { transient: false });