diff --git a/backend/README.md b/backend/README.md
index 0267517b4..7aca0e488 100644
--- a/backend/README.md
+++ b/backend/README.md
@@ -31,7 +31,7 @@ Names and regions should match above.
 
 ### Deploy
 
-1.  Update `bucket` in `backend/server.js`
+1.  Update `GCS_BUCKET` in `backend/app.yaml`
 2.  Create the files to deploy: `VITE_ON_GCP="true" VITE_RESOURCE_BASE="https://atip-test-2.ew.r.appspot.com/data" npm run build && cd backend && rm -rf dist && cp -R ../dist .`
 	- Note we could make Cloud Build do this, but we'd have to get `wasm-pack` and other things set up there first
 	- GH Actions will eventually trigger CI deployments for our test environment, and we've already done the work of configuring that build environment
diff --git a/backend/app.yaml b/backend/app.yaml
index 28b5cb8ee..0a595f31f 100644
--- a/backend/app.yaml
+++ b/backend/app.yaml
@@ -1 +1,3 @@
 runtime: nodejs18
+env_variables:
+  GCS_BUCKET: "atip-test-2"
diff --git a/backend/server.js b/backend/server.js
index 879d067ad..de6be3566 100644
--- a/backend/server.js
+++ b/backend/server.js
@@ -7,7 +7,9 @@ import express from "express";
 // This automatically finds gcloud credentials when running locally or the
 // service account on GAE 
 let storage = new Storage();
-let bucket = "atip-test-2";
+// TODO Upfront check the bucket is accessible and has some expected files, so
+// we could failfail for a bad deployment
+let bucket = process.env.GCS_BUCKET;
 
 let app = express();
 
diff --git a/src/pages/BrowseSchemes.svelte b/src/pages/BrowseSchemes.svelte
index 74697575f..7ed688d6f 100644
--- a/src/pages/BrowseSchemes.svelte
+++ b/src/pages/BrowseSchemes.svelte
@@ -93,7 +93,7 @@
       <h1>Browse schemes</h1>
       <ZoomOutMap boundaryGeojson={$gjScheme} />
     </div>
-    {#if import.meta.env.VITE_ON_GCP == "true"}
+    {#if import.meta.env.VITE_ON_GCP === "true"}
       <LoadRemoteSchemeData {loadFile} />
     {/if}
     <FileInput label="Load schemes from GeoJSON" id="load-geojson" {loadFile} />