diff --git a/packages/sns/lib/utils/stsUtils.spec.ts b/packages/sns/lib/utils/stsUtils.spec.ts
index a1dba067..69eb6615 100644
--- a/packages/sns/lib/utils/stsUtils.spec.ts
+++ b/packages/sns/lib/utils/stsUtils.spec.ts
@@ -1,22 +1,35 @@
+import type { SNSClient } from '@aws-sdk/client-sns'
 import type { STSClient } from '@aws-sdk/client-sts'
-import { beforeAll, describe, expect, it } from 'vitest'
+import { beforeAll, beforeEach, describe, expect, it } from 'vitest'
 import { registerDependencies } from '../../test/utils/testContext'
-import { buildTopicArn } from './stsUtils'
+import { assertTopic, deleteTopic } from './snsUtils'
 
 describe('stsUtils', () => {
   let stsClient: STSClient
+  let snsClient: SNSClient
 
   beforeAll(async () => {
     const diContainer = await registerDependencies({}, false)
     stsClient = diContainer.cradle.stsClient
+    snsClient = diContainer.cradle.snsClient
   })
 
   describe('buildTopicArn', () => {
+    const topicName = 'my-test-topic'
+
+    beforeEach(async () => {
+      await deleteTopic(snsClient, stsClient, topicName)
+    })
+
     it('build ARN for topic', async () => {
-      const topicName = 'my-test-topic'
-      await expect(buildTopicArn(stsClient, topicName)).resolves.toMatchInlineSnapshot(
+      const expectedTopicArn = `arn:aws:sns:eu-west-1:000000000000:${topicName}`
+      expect(expectedTopicArn).toMatchInlineSnapshot(
         `"arn:aws:sns:eu-west-1:000000000000:my-test-topic"`,
       )
+
+      // creating real topic to make sure arn is correct
+      const topicArn = await assertTopic(snsClient, stsClient, { Name: topicName })
+      expect(topicArn).toBe(expectedTopicArn)
     })
   })
 })