diff --git a/api-tests/tests/helpers.ts b/api-tests/tests/helpers.ts
index 40bf1c18..50b63ab0 100644
--- a/api-tests/tests/helpers.ts
+++ b/api-tests/tests/helpers.ts
@@ -2,10 +2,10 @@ import { expect, test } from '@playwright/test'
 
 // testPrefix is used to differentiate between several workers
 // running this test to avoid conflicts in instance names
-export const testPrefix = () => `t${(Math.random() + 1).toString(36).substring(10)}`
+export const testPrefix = `t${(Math.random() + 1).toString(36).substring(10)}`
 
 export const suffixedName = (name) => {
-  return `${name}-${testPrefix()}`
+  return `${name}-${testPrefix}`
 }
 
 export const checkError = async response => {
diff --git a/api-tests/tests/kubernetes.spec.ts b/api-tests/tests/kubernetes.spec.ts
index bdb2dfb6..3cc217c8 100644
--- a/api-tests/tests/kubernetes.spec.ts
+++ b/api-tests/tests/kubernetes.spec.ts
@@ -31,38 +31,6 @@ test('get resource usage', async ({ request }) => {
   expect(resources?.available).toBeTruthy()
 })
 
-test('enable/disable cluster-monitoring', async ({ request }) => {
-  const data = {
-    type: 'pmm',
-    name: `${testPrefix}-monit`,
-    url: 'http://monitoring',
-    targetNamespaces: [testsNs],
-    pmm: {
-      apiKey: '123',
-    },
-  }
-
-  const response = await request.post('/v1/monitoring-instances', { data })
-
-  await checkError(response)
-  const created = await response.json()
-
-  const rEnable = await request.post(`/v1/cluster-monitoring`, {
-    data: {
-      enable: true,
-      monitoringInstanceName: created.name,
-    },
-  })
-
-  await checkError(rEnable)
-
-  const rDisable = await request.post(`/v1/cluster-monitoring`, {
-    data: { enable: false },
-  })
-
-  await checkError(rDisable)
-})
-
 test('get cluster info', async ({ request }) => {
   const r = await request.get(`/v1/cluster-info`)
   const info = await r.json()
diff --git a/api-tests/tests/monitoring-instances.spec.ts b/api-tests/tests/monitoring-instances.spec.ts
index 16c471d3..00adde3a 100644
--- a/api-tests/tests/monitoring-instances.spec.ts
+++ b/api-tests/tests/monitoring-instances.spec.ts
@@ -131,7 +131,7 @@ test('get monitoring instance', async ({ request }) => {
 })
 
 test('delete monitoring instance', async ({ request }) => {
-  const namePrefix = 'delete-'
+  const namePrefix = 'del-'
   const names = await createInstances(request, namePrefix)
   const name = names[1]