diff --git a/.run/Unit tests.run.xml b/.run/Unit tests.run.xml
index 23543c0d..f698939e 100644
--- a/.run/Unit tests.run.xml	
+++ b/.run/Unit tests.run.xml	
@@ -1,5 +1,6 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="Unit tests" type="JavaScriptTestRunnerJest">
+    <config-file value="$PROJECT_DIR$/jest.config.json" />
     <node-interpreter value="project" />
     <node-options value="" />
     <jest-package value="$PROJECT_DIR$/node_modules/jest" />
diff --git a/package.json b/package.json
index faa06405..d4e78860 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "lint:prettier": "npx prettier {src/application,src/domain,lib,test,servers}/**/*.{js,vue} --write",
     "lint:stylelint": "npx stylelint --fix 'src/application/**/*.scss'",
     "test": "npm run test:unit",
-    "test:unit": "npx jest",
+    "test:unit": "npx jest -c jest.config.json",
     "test:coverage": "npx jest --coverage",
     "test:coverage:preview": "npm run test:coverage && npx http-server coverage/lcov-report/ -p 8002",
     "ci": "npm run lint && npm run test",
diff --git a/src/domain/user-preferences/preference-entry.util.js b/src/domain/user-preferences/preference-entry.util.js
index e6238bb4..a408276e 100644
--- a/src/domain/user-preferences/preference-entry.util.js
+++ b/src/domain/user-preferences/preference-entry.util.js
@@ -18,6 +18,8 @@ export const applyFiltersToPreferenceEntriesList = (filters, list) => {
   return list.filter((preferenceEntry) => {
     const filterMatches = [true];
 
+    if (typeof filters !== 'object' || filters === null) return true;
+
     if (Object.hasOwn(filters, 'label') && filters.label.length !== 0) {
       filterMatches.push(
         preferenceEntry.label
diff --git a/src/domain/user-preferences/preference-entry.util.spec.js b/src/domain/user-preferences/preference-entry.util.spec.js
index 97c88fa8..9dbc97c3 100644
--- a/src/domain/user-preferences/preference-entry.util.spec.js
+++ b/src/domain/user-preferences/preference-entry.util.spec.js
@@ -11,11 +11,23 @@ const existingConfiguration = [
         value: 'value1'
       }
     ]
+  },
+  {
+    id: 'another_existing_configuration_id',
+    target: 'application',
+    label: 'Unicorn label 2',
+    description: 'Description 2',
+    values: null
   }
 ];
 jest.mock('@/domain/user-preferences/map.json', () => existingConfiguration);
 
-import { findPreferenceEntryById } from '@/domain/user-preferences/preference-entry.util';
+import {
+  applyFiltersToPreferenceEntriesList,
+  convertJsonObjectToPreferenceEntry,
+  findPreferenceEntryById
+} from '@/domain/user-preferences/preference-entry.util';
+import { PreferenceEntry } from '@/domain/user-preferences/PreferenceEntry';
 
 describe('Preference entries', () => {
   it('An existing preference entry must return data successfully', () => {
@@ -32,4 +44,65 @@ describe('Preference entries', () => {
       `Unable to find ${unknownPreferenceEntryId} on preference entries list`
     );
   });
+
+  it('An object typed of PreferenceEntry must be returned by the converter successfully', () => {
+    const anonymousObject = existingConfiguration.at(0);
+    const convertedObject = convertJsonObjectToPreferenceEntry(anonymousObject);
+
+    expect(convertedObject instanceof PreferenceEntry).toBeTruthy();
+    expect(convertedObject).toMatchObject(
+      new PreferenceEntry(
+        anonymousObject.id,
+        anonymousObject.target,
+        anonymousObject.label,
+        anonymousObject.description,
+        anonymousObject.values
+      )
+    );
+  });
+
+  describe('Preference entry filter', () => {
+    const unknownFilters = [
+      [],
+      {},
+      '',
+      'string',
+      123,
+      undefined,
+      null,
+      new PreferenceEntry(),
+      { label: '' },
+      { target: '' },
+      { label: '', target: '' }
+    ];
+
+    it.each(unknownFilters)(
+      'Preference entries must not have any differences with invalid filters',
+      (filter) => {
+        expect(
+          applyFiltersToPreferenceEntriesList(filter, existingConfiguration)
+        ).toStrictEqual(existingConfiguration);
+      }
+    );
+
+    const validFilters = [
+      { label: 'Unicorn label 2' },
+      { label: 'unicorn label 2' },
+      { label: 'LaBeL' },
+      { label: 'uni' },
+      { label: '2' },
+      { label: 'uni', target: 'app' },
+      { label: 'uni', target: 'application' }
+    ];
+    it.each(validFilters)(
+      'A preference entry must be returned with matched filters',
+      (filter) => {
+        expect(
+          applyFiltersToPreferenceEntriesList(filter, existingConfiguration).at(
+            0
+          )
+        ).toStrictEqual(existingConfiguration.at(1));
+      }
+    );
+  });
 });