diff --git a/.changeset/new-ladybugs-nail.md b/.changeset/new-ladybugs-nail.md
new file mode 100644
index 0000000000..5351b6dff3
--- /dev/null
+++ b/.changeset/new-ladybugs-nail.md
@@ -0,0 +1,5 @@
+---
+'@backstage/cli': patch
+---
+
+New lint rule to disallow <type> assertions and promote `as` assertions. - @typescript-eslint/consistent-type-assertions
diff --git a/packages/cli/config/eslint.js b/packages/cli/config/eslint.js
index 9b1880c1db..e2a807e42e 100644
--- a/packages/cli/config/eslint.js
+++ b/packages/cli/config/eslint.js
@@ -58,6 +58,7 @@ module.exports = {
     ],
     'no-unused-expressions': 'off',
     '@typescript-eslint/no-unused-expressions': 'error',
+    '@typescript-eslint/consistent-type-assertions': 'error',
     '@typescript-eslint/no-unused-vars': [
       'warn',
       {
diff --git a/plugins/kubernetes-backend/src/service/getKubernetesObjectsForServiceHandler.ts b/plugins/kubernetes-backend/src/service/getKubernetesObjectsForServiceHandler.ts
index 1b0cf4f783..82220f5d6c 100644
--- a/plugins/kubernetes-backend/src/service/getKubernetesObjectsForServiceHandler.ts
+++ b/plugins/kubernetes-backend/src/service/getKubernetesObjectsForServiceHandler.ts
@@ -97,12 +97,12 @@ export const handleGetKubernetesObjectsForService: GetKubernetesObjectsForServic
   return Promise.all(
     clusterDetailsDecoratedForAuth.map(clusterDetails => {
       return fetcher
-        .fetchObjectsForService(<ObjectFetchParams>{
+        .fetchObjectsForService({
           serviceId,
           clusterDetails,
           objectTypesToFetch,
           labelSelector,
-        })
+        } as ObjectFetchParams)
         .then(result => {
           return {
             cluster: {