diff --git a/cypress.config.ts b/cypress.config.ts
index dfa17ab32c..f9bc521bdd 100644
--- a/cypress.config.ts
+++ b/cypress.config.ts
@@ -30,8 +30,8 @@ export default defineConfig({
         specPattern: "cypress/e2e/**/*.{js,jsx,ts,tsx}",
     },
     env: {
-        // Docker tag to use for `ghcr.io/matrix-org/sliding-sync-proxy` image.
-        SLIDING_SYNC_PROXY_TAG: "v0.6.0",
+        // Docker tag to use for `ghcr.io/matrix-org/sliding-sync` image.
+        SLIDING_SYNC_PROXY_TAG: "v0.99.0-rc1",
         HOMESERVER: "synapse",
     },
     retries: {
diff --git a/cypress/plugins/sliding-sync/index.ts b/cypress/plugins/sliding-sync/index.ts
index 8204fb578d..ab39c7a42b 100644
--- a/cypress/plugins/sliding-sync/index.ts
+++ b/cypress/plugins/sliding-sync/index.ts
@@ -23,7 +23,7 @@ import { getFreePort } from "../utils/port";
 import { HomeserverInstance } from "../utils/homeserver";
 
 // A cypress plugin to add command to start & stop https://github.com/matrix-org/sliding-sync
-// SLIDING_SYNC_PROXY_TAG env used as the docker tag to use for `ghcr.io/matrix-org/sliding-sync-proxy` image.
+// SLIDING_SYNC_PROXY_TAG env used as the docker tag to use for `ghcr.io/matrix-org/sliding-sync` image.
 
 export interface ProxyInstance {
     containerId: string;
@@ -72,7 +72,7 @@ async function proxyStart(dockerTag: string, homeserver: HomeserverInstance): Pr
     const port = await getFreePort();
     console.log(new Date(), "starting proxy container...", dockerTag);
     const containerId = await dockerRun({
-        image: "ghcr.io/matrix-org/sliding-sync-proxy:" + dockerTag,
+        image: "ghcr.io/matrix-org/sliding-sync:" + dockerTag,
         containerName: "react-sdk-cypress-sliding-sync-proxy",
         params: [
             "--rm",