diff --git a/.github/workflows/test-build.yml b/.github/workflows/test-build.yml
index 1dea765308..8bcd240011 100644
--- a/.github/workflows/test-build.yml
+++ b/.github/workflows/test-build.yml
@@ -109,6 +109,9 @@ jobs:
       - name: Verify realtime prune graph
         run: bun run check:realtime-prune
 
+      - name: Type-check realtime server
+        run: bunx turbo run type-check --filter=@sim/realtime
+
       - name: Run tests with coverage
         env:
           NODE_OPTIONS: '--no-warnings --max-old-space-size=8192'
diff --git a/apps/realtime/src/index.ts b/apps/realtime/src/index.ts
index aae6dfed3f..6ea031163b 100644
--- a/apps/realtime/src/index.ts
+++ b/apps/realtime/src/index.ts
@@ -29,7 +29,7 @@ async function createRoomManager(io: SocketIOServer): Promise<IRoomManager> {
 
 async function main() {
   const httpServer = createServer()
-  const PORT = Number(env.PORT || env.SOCKET_PORT || 3002)
+  const PORT = Number(env.SOCKET_PORT ?? env.PORT ?? 3002)
 
   logger.info('Starting Socket.IO server...', {
     port: PORT,
diff --git a/docker/realtime.Dockerfile b/docker/realtime.Dockerfile
index 36891f49b6..8092709267 100644
--- a/docker/realtime.Dockerfile
+++ b/docker/realtime.Dockerfile
@@ -37,7 +37,6 @@ WORKDIR /app
 
 ENV NODE_ENV=production \
     PORT=3002 \
-    SOCKET_PORT=3002 \
     HOSTNAME="0.0.0.0"
 
 RUN addgroup -g 1001 -S nodejs && \