diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d04a47d..f3f6994 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -93,17 +93,15 @@ jobs:
           --health-interval 10s
           --health-timeout 10s
           --health-retries 10
-      localstack:
-        # Pinned to the last community release. Newer images quit with
-        # "License activation failed" unless LOCALSTACK_AUTH_TOKEN is set.
-        image: localstack/localstack:4.14.0
+      elasticmq:
+        image: softwaremill/elasticmq-native:1.7.1
         ports:
-          - 4566:4566
-        env:
-          SERVICES: sqs
-          DEBUG: 0
+          - 9324:9324
+        # The image is Alpine plus the server binary, so wget is the only HTTP
+        # client in it. A bare GET answers 400 because SQS wants an Action, so
+        # ask for one: ListQueues needs no credentials and answers 200.
         options: >-
-          --health-cmd "curl -f http://localhost:4566/_localstack/health || exit 1"
+          --health-cmd "wget -q -O /dev/null 'http://localhost:9324/?Action=ListQueues' || exit 1"
           --health-interval 5s
           --health-timeout 5s
           --health-retries 10
@@ -214,17 +212,15 @@ jobs:
           --health-interval 10s
           --health-timeout 10s
           --health-retries 10
-      localstack:
-        # Pinned to the last community release. Newer images quit with
-        # "License activation failed" unless LOCALSTACK_AUTH_TOKEN is set.
-        image: localstack/localstack:4.14.0
+      elasticmq:
+        image: softwaremill/elasticmq-native:1.7.1
         ports:
-          - 4566:4566
-        env:
-          SERVICES: sqs
-          DEBUG: 0
+          - 9324:9324
+        # The image is Alpine plus the server binary, so wget is the only HTTP
+        # client in it. A bare GET answers 400 because SQS wants an Action, so
+        # ask for one: ListQueues needs no credentials and answers 200.
         options: >-
-          --health-cmd "curl -f http://localhost:4566/_localstack/health || exit 1"
+          --health-cmd "wget -q -O /dev/null 'http://localhost:9324/?Action=ListQueues' || exit 1"
           --health-interval 5s
           --health-timeout 5s
           --health-retries 10
@@ -324,17 +320,15 @@ jobs:
           --health-interval 10s
           --health-timeout 10s
           --health-retries 10
-      localstack:
-        # Pinned to the last community release. Newer images quit with
-        # "License activation failed" unless LOCALSTACK_AUTH_TOKEN is set.
-        image: localstack/localstack:4.14.0
+      elasticmq:
+        image: softwaremill/elasticmq-native:1.7.1
         ports:
-          - 4566:4566
-        env:
-          SERVICES: sqs
-          DEBUG: 0
+          - 9324:9324
+        # The image is Alpine plus the server binary, so wget is the only HTTP
+        # client in it. A bare GET answers 400 because SQS wants an Action, so
+        # ask for one: ListQueues needs no credentials and answers 200.
         options: >-
-          --health-cmd "curl -f http://localhost:4566/_localstack/health || exit 1"
+          --health-cmd "wget -q -O /dev/null 'http://localhost:9324/?Action=ListQueues' || exit 1"
           --health-interval 5s
           --health-timeout 5s
           --health-retries 10
diff --git a/compose.yaml b/compose.yaml
index 5dba621..883d0a0 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -118,17 +118,23 @@ services:
       timeout: 5s
       retries: 10
 
-  localstack:
-    # Pinned to the last community release. Newer images quit with
-    # "License activation failed" unless LOCALSTACK_AUTH_TOKEN is set.
-    image: localstack/localstack:4.14.0
+  elasticmq:
+    image: softwaremill/elasticmq-native:1.7.1
     ports:
-      - "4566:4566"
-    environment:
-      SERVICES: sqs
-      DEBUG: 0
+      - "9324:9324"
     healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:4566/_localstack/health"]
+      # The image is Alpine plus the server binary, so wget is the only HTTP
+      # client in it. A bare GET answers 400 because SQS wants an Action, so
+      # ask for one: ListQueues needs no credentials and answers 200.
+      test:
+        [
+          "CMD",
+          "wget",
+          "-q",
+          "-O",
+          "/dev/null",
+          "http://localhost:9324/?Action=ListQueues",
+        ]
       interval: 5s
       timeout: 5s
       retries: 10
diff --git a/probitas/13-client-sqs.probitas.ts b/probitas/13-client-sqs.probitas.ts
index 07ba1c6..ae9703f 100644
--- a/probitas/13-client-sqs.probitas.ts
+++ b/probitas/13-client-sqs.probitas.ts
@@ -1,24 +1,33 @@
 /**
  * SQS Client Scenario Example
  *
- * Target: localstack service on port 4566 (compose.yaml)
- * Uses LocalStack for AWS SQS emulation
+ * Target: elasticmq service on port 9324 (compose.yaml)
+ * Uses ElasticMQ for AWS SQS emulation
  */
 import { client, expect, scenario, Skip } from "jsr:@probitas/probitas@^0";
 import type { SqsMessage } from "jsr:@probitas/client-sqs@^0";
 
-const BASE_URL = "http://localhost:4566";
+const BASE_URL = "http://localhost:9324";
 
 export default scenario("SQS Client Example", {
   tags: ["integration", "sqs", "aws"],
 })
-  .setup("Check LocalStack availability", async () => {
+  .setup("Check ElasticMQ availability", async () => {
+    let response: Response;
     try {
-      await fetch(`${BASE_URL}/_localstack/health`, {
+      // ListQueues rather than a bare GET: SQS answers 400 without an Action,
+      // so a plain request would look like a failure. It needs no credentials.
+      response = await fetch(`${BASE_URL}/?Action=ListQueues`, {
         signal: AbortSignal.timeout(1000),
       });
     } catch {
-      throw new Skip(`LocalStack not available at ${BASE_URL}`);
+      throw new Skip(`ElasticMQ not available at ${BASE_URL}`);
+    }
+    await response.body?.cancel();
+    if (!response.ok) {
+      throw new Skip(
+        `ElasticMQ at ${BASE_URL} answered ${response.status}`,
+      );
     }
   })
   .resource("sqs", () =>