diff --git a/.github/workflows/integration.yaml b/.github/workflows/integration.yaml
index 76a1d066..a2cb0594 100644
--- a/.github/workflows/integration.yaml
+++ b/.github/workflows/integration.yaml
@@ -40,7 +40,7 @@ jobs:
     name: "Features integration test (sdk-test-suite version ${{ matrix.sdk-test-suite }})"
     strategy:
       matrix:
-        sdk-test-suite: ["1.5"]
+        sdk-test-suite: ["2.1"]
     permissions:
       contents: read
       issues: read
diff --git a/packages/restate-e2e-services/exclusions.yaml b/packages/restate-e2e-services/exclusions.yaml
index 7831c238..76f5164e 100644
--- a/packages/restate-e2e-services/exclusions.yaml
+++ b/packages/restate-e2e-services/exclusions.yaml
@@ -1 +1,7 @@
-exclusions: {}
+exclusions:
+  "alwaysSuspending":
+    - "dev.restate.sdktesting.tests.RunRetry"
+  "default":
+    - "dev.restate.sdktesting.tests.RunRetry"
+  "singleThreadSinglePartition":
+    - "dev.restate.sdktesting.tests.RunRetry"
diff --git a/packages/restate-e2e-services/src/list.ts b/packages/restate-e2e-services/src/list.ts
index ac10ca1d..75d1a14d 100644
--- a/packages/restate-e2e-services/src/list.ts
+++ b/packages/restate-e2e-services/src/list.ts
@@ -35,3 +35,5 @@ const o = restate.object({
 });
 
 REGISTRY.addObject(o);
+
+export type ListObject = typeof o;
diff --git a/packages/restate-e2e-services/src/proxy.ts b/packages/restate-e2e-services/src/proxy.ts
index b08374cd..808f883e 100644
--- a/packages/restate-e2e-services/src/proxy.ts
+++ b/packages/restate-e2e-services/src/proxy.ts
@@ -17,6 +17,7 @@ type ProxyRequest = {
   virtualObjectKey?: string;
   handlerName: string;
   message: Array<number>;
+  delayMillis?: number;
 };
 
 type ManyCallRequest = {
@@ -46,6 +47,7 @@ function rawSend(ctx: restate.Context, request: ProxyRequest) {
     key: request.virtualObjectKey,
     inputSerde: restate.serde.binary,
     parameter: new Uint8Array(request.message),
+    delay: request.delayMillis,
   });
 }
 
diff --git a/packages/restate-e2e-services/src/test_utils.ts b/packages/restate-e2e-services/src/test_utils.ts
index 747f7779..517a2227 100644
--- a/packages/restate-e2e-services/src/test_utils.ts
+++ b/packages/restate-e2e-services/src/test_utils.ts
@@ -11,8 +11,20 @@ import * as restate from "@restatedev/restate-sdk";
 import { REGISTRY } from "./services.js";
 
 import type { AwakeableHolder } from "./awakeable_holder.js";
+import * as process from "node:process";
+import { ListObject } from "./list.js";
 
 const AwakeableHolder: AwakeableHolder = { name: "AwakeableHolder" };
+const ListObject: ListObject = { name: "ListObject" };
+
+type Command =
+  | { type: "createAwakeableAndAwaitIt"; awakeableKey: string }
+  | { type: "getEnvVariable"; envName: string };
+
+interface InterpretRequest {
+  listName: string;
+  commands: Command[];
+}
 
 const o = restate.service({
   name: "TestUtilsService",
@@ -32,6 +44,13 @@ const o = restate.service({
       );
     },
 
+    rawEcho: restate.handlers.handler(
+      { input: restate.serde.binary, output: restate.serde.binary },
+      (ctx: restate.Context, input: Uint8Array) => {
+        return Promise.resolve(input);
+      }
+    ),
+
     async createAwakeableAndAwaitIt(
       ctx: restate.Context,
       req: { awakeableKey: string; awaitTimeout?: number }
@@ -82,6 +101,42 @@ const o = restate.service({
 
       return invokedSideEffects;
     },
+
+    async getEnvVariable(ctx: restate.Context, env: string): Promise<string> {
+      return ctx.run(() => process.env[env] ?? "");
+    },
+
+    async interpretCommands(
+      ctx: restate.Context,
+      req: InterpretRequest
+    ): Promise<void> {
+      const listClient = ctx.objectSendClient(ListObject, req.listName);
+
+      async function createAwakeableAndAwaitIt(
+        awakeableKey: string
+      ): Promise<string> {
+        const { id, promise } = ctx.awakeable<string>();
+        await ctx.objectClient(AwakeableHolder, awakeableKey).hold(id);
+        return promise;
+      }
+
+      async function getEnvVariable(envName: string): Promise<string> {
+        return ctx.run(() => process.env[envName] ?? "");
+      }
+
+      for (const command of req.commands) {
+        switch (command.type) {
+          case "createAwakeableAndAwaitIt":
+            listClient.append(
+              await createAwakeableAndAwaitIt(command.awakeableKey)
+            );
+            break;
+          case "getEnvVariable":
+            listClient.append(await getEnvVariable(command.envName));
+            break;
+        }
+      }
+    },
   },
 });