diff --git a/ui/app/components/mfa/mfa-login-enforcement-form.js b/ui/app/components/mfa/mfa-login-enforcement-form.js
index 868ea1d942..f12f9d279c 100644
--- a/ui/app/components/mfa/mfa-login-enforcement-form.js
+++ b/ui/app/components/mfa/mfa-login-enforcement-form.js
@@ -74,7 +74,7 @@ export default class MfaLoginEnforcementForm extends Component {
       const types = ['identity/group', 'identity/entity'];
       for (const type of types) {
         try {
-          options[type] = (await this.store.query(type, {})).slice();
+          options[type] = await this.store.query(type, {});
         } catch (error) {
           options[type] = [];
         }
@@ -89,7 +89,7 @@ export default class MfaLoginEnforcementForm extends Component {
     }
   }
   async fetchAuthMethods() {
-    const mounts = (await this.store.findAll('auth-method')).slice();
+    const mounts = await this.store.findAll('auth-method');
     this.authMethods = mounts.map((auth) => auth.type);
   }
 
diff --git a/ui/app/components/mfa/mfa-login-enforcement-header.js b/ui/app/components/mfa/mfa-login-enforcement-header.js
index 17ea852e06..03c424213c 100644
--- a/ui/app/components/mfa/mfa-login-enforcement-header.js
+++ b/ui/app/components/mfa/mfa-login-enforcement-header.js
@@ -41,7 +41,7 @@ export default class MfaLoginEnforcementHeaderComponent extends Component {
   async fetchEnforcements() {
     try {
       // cache initial values for lookup in select handler
-      this._enforcements = (await this.store.query('mfa-login-enforcement', {})).slice();
+      this._enforcements = await this.store.query('mfa-login-enforcement', {});
       this.enforcements = [...this._enforcements];
     } catch (error) {
       this.enforcements = [];
diff --git a/ui/app/services/wizard.js b/ui/app/services/wizard.js
index 89f32ad7a1..b38b3af713 100644
--- a/ui/app/services/wizard.js
+++ b/ui/app/services/wizard.js
@@ -324,7 +324,7 @@ export default Service.extend(DEFAULTS, {
 
   getCompletedFeatures() {
     if (this.storageHasKey(COMPLETED_FEATURES)) {
-      return this.getExtState(COMPLETED_FEATURES).slice();
+      return this.getExtState(COMPLETED_FEATURES);
     }
     return [];
   },
@@ -337,7 +337,7 @@ export default Service.extend(DEFAULTS, {
       completed.push(done);
       this.saveExtState(COMPLETED_FEATURES, completed);
     } else {
-      this.saveExtState(COMPLETED_FEATURES, this.getExtState(COMPLETED_FEATURES).slice().addObject(done));
+      this.saveExtState(COMPLETED_FEATURES, this.getExtState(COMPLETED_FEATURES).addObject(done));
     }
 
     this.saveExtState(FEATURE_LIST, features.length ? features : null);
diff --git a/ui/lib/core/addon/components/search-select-with-modal.js b/ui/lib/core/addon/components/search-select-with-modal.js
index 369cf90ad9..85e66a872a 100644
--- a/ui/lib/core/addon/components/search-select-with-modal.js
+++ b/ui/lib/core/addon/components/search-select-with-modal.js
@@ -69,7 +69,7 @@ export default class SearchSelectWithModal extends Component {
 
   addSearchText(optionsToFormat) {
     // maps over array models from query
-    return optionsToFormat.slice().map((option) => {
+    return optionsToFormat.map((option) => {
       option.searchText = `${option.name} ${option.id}`;
       return option;
     });
diff --git a/ui/lib/core/addon/components/search-select.js b/ui/lib/core/addon/components/search-select.js
index 2c76d4f63e..555941ef8b 100644
--- a/ui/lib/core/addon/components/search-select.js
+++ b/ui/lib/core/addon/components/search-select.js
@@ -100,7 +100,7 @@ export default class SearchSelect extends Component {
 
   addSearchText(optionsToFormat) {
     // maps over array of objects or response from query
-    return optionsToFormat.slice().map((option) => {
+    return optionsToFormat.map((option) => {
       const id = option[this.idKey] ? option[this.idKey] : option.id;
       option.searchText = `${option[this.nameKey]} ${id}`;
       return option;
diff --git a/ui/mirage/handlers/mfa-config.js b/ui/mirage/handlers/mfa-config.js
index f078286379..2563f9b5d8 100644
--- a/ui/mirage/handlers/mfa-config.js
+++ b/ui/mirage/handlers/mfa-config.js
@@ -50,7 +50,7 @@ export default function (server) {
           records.push(server.create(`mfa-${type}-method`));
         });
       } else {
-        records = server.createList('mfa-login-enforcement', 4).slice();
+        records = server.createList('mfa-login-enforcement', 4);
       }
     }
     const dataKey = isMethod ? 'id' : 'name';
diff --git a/ui/tests/helpers/sync/setup-models.js b/ui/tests/helpers/sync/setup-models.js
index 7449704f9c..801861d5b1 100644
--- a/ui/tests/helpers/sync/setup-models.js
+++ b/ui/tests/helpers/sync/setup-models.js
@@ -17,7 +17,7 @@ export function setupModels(hooks) {
       id: destination.name,
     });
     this.destination = this.store.peekRecord(destinationModelName, destination.name);
-    this.destinations = this.store.peekAll(destinationModelName).slice();
+    this.destinations = this.store.peekAll(destinationModelName);
     this.destinations.meta = {
       filteredTotal: this.destinations.length,
       currentPage: 1,
@@ -43,7 +43,7 @@ export function setupModels(hooks) {
     });
 
     this.association = this.store.peekRecord(associationModelName, associationId);
-    this.associations = this.store.peekAll(associationModelName).slice();
+    this.associations = this.store.peekAll(associationModelName);
     this.associations.meta = {
       filteredTotal: this.associations.length,
       currentPage: 1,
diff --git a/ui/tests/integration/components/mfa-login-enforcement-form-test.js b/ui/tests/integration/components/mfa-login-enforcement-form-test.js
index 2f61bb12bf..e593f2d19e 100644
--- a/ui/tests/integration/components/mfa-login-enforcement-form-test.js
+++ b/ui/tests/integration/components/mfa-login-enforcement-form-test.js
@@ -152,7 +152,7 @@ module('Integration | Component | mfa-login-enforcement-form', function (hooks)
 
   test('it should populate fields with model data', async function (assert) {
     this.model.name = 'foo';
-    const [method] = (await this.store.query('mfa-method', {})).slice();
+    const [method] = await this.store.query('mfa-method', {});
     this.model.mfa_methods.addObject(method);
     this.model.auth_method_accessors.addObject('auth_userpass_1234');
 
@@ -209,9 +209,9 @@ module('Integration | Component | mfa-login-enforcement-form', function (hooks)
     }));
     this.model.auth_method_accessors.addObject('auth_userpass_1234');
     this.model.auth_method_types.addObject('userpass');
-    const [entity] = (await this.store.query('identity/entity', {})).slice();
+    const [entity] = await this.store.query('identity/entity', {});
     this.model.identity_entities.addObject(entity);
-    const [group] = (await this.store.query('identity/group', {})).slice();
+    const [group] = await this.store.query('identity/group', {});
     this.model.identity_groups.addObject(group);
 
     await render(hbs`
diff --git a/ui/tests/integration/components/pki-paginated-list-test.js b/ui/tests/integration/components/pki-paginated-list-test.js
index f99d6fddb7..f6a7ff065e 100644
--- a/ui/tests/integration/components/pki-paginated-list-test.js
+++ b/ui/tests/integration/components/pki-paginated-list-test.js
@@ -35,7 +35,7 @@ module('Integration | Component | pki-paginated-list', function (hooks) {
       },
     });
     // mimic what happens in lazyPaginatedQuery
-    const keyModels = this.store.peekAll('pki/key').slice();
+    const keyModels = this.store.peekAll('pki/key');
     keyModels.meta = STANDARD_META;
     this.list = keyModels;
     const emptyList = this.store.peekAll('pki/foo');
diff --git a/ui/tests/integration/components/sync/secrets/page/destinations-test.js b/ui/tests/integration/components/sync/secrets/page/destinations-test.js
index ed1f407317..51b93bbf9d 100644
--- a/ui/tests/integration/components/sync/secrets/page/destinations-test.js
+++ b/ui/tests/integration/components/sync/secrets/page/destinations-test.js
@@ -46,7 +46,7 @@ module('Integration | Component | sync | Page::Destinations', function (hooks) {
     });
 
     // mimic what happens in lazyPaginatedQuery
-    this.destinations = store.peekAll(modelName).slice();
+    this.destinations = store.peekAll(modelName);
     this.destinations.meta = {
       filteredTotal: this.destinations.length,
       currentPage: 1,