diff --git a/src/utils/card.test.ts b/src/utils/card.test.ts
new file mode 100644
index 0000000000..1e23612061
--- /dev/null
+++ b/src/utils/card.test.ts
@@ -0,0 +1,37 @@
+import { describe, expect, it } from 'vitest';
+import * as card from './card';
+
+describe('Utils: card', () => {
+    describe('Function: getSquareShape', () => {
+        it('Should return "overflowSquare"', () => {
+            const result = card.getSquareShape(true);
+            expect(result).toEqual('overflowSquare');
+        });
+        it('Should return "square"', () => {
+            const result = card.getSquareShape(false);
+            expect(result).toEqual('square');
+        });
+    });
+
+    describe('Function: getBackdropShape', () => {
+        it('Should return "overflowBackdrop"', () => {
+            const result = card.getBackdropShape(true);
+            expect(result).toEqual('overflowBackdrop');
+        });
+        it('Should return "backdrop"', () => {
+            const result = card.getBackdropShape(false);
+            expect(result).toEqual('backdrop');
+        });
+    });
+
+    describe('Function: getPortraitShape', () => {
+        it('Should return "overflowPortrait"', () => {
+            const result = card.getPortraitShape(true);
+            expect(result).toEqual('overflowPortrait');
+        });
+        it('Should return "portrait"', () => {
+            const result = card.getPortraitShape(false);
+            expect(result).toEqual('portrait');
+        });
+    });
+});
diff --git a/src/utils/dateFnsLocale.test.ts b/src/utils/dateFnsLocale.test.ts
new file mode 100644
index 0000000000..aad7979f96
--- /dev/null
+++ b/src/utils/dateFnsLocale.test.ts
@@ -0,0 +1,58 @@
+import { describe, expect, it } from 'vitest';
+import * as dateFnsLocale from './dateFnsLocale';
+
+describe('Utils: dateFnsLocale', () => {
+    describe('Function: getLocale', () => {
+        it('Should return "en-US" by default', () => {
+            const { code } = dateFnsLocale.getLocale();
+            expect(code).toEqual('en-US');
+        });
+    });
+
+    describe('Function: getLocaleWithSuffix', () => {
+        it('Should return "en-US" by default with addSuffix to true', () => {
+            const { addSuffix, locale } = dateFnsLocale.getLocaleWithSuffix();
+
+            expect(addSuffix).toEqual(true);
+            expect(locale.code).toEqual('en-US');
+        });
+    });
+
+    describe('Function: updateLocale', () => {
+        it('Should import "fr-ca" locale', async () => {
+            const expectedCode = 'fr-CA';
+
+            await dateFnsLocale.updateLocale('fr-ca');
+            const { code } = dateFnsLocale.getLocale();
+            const { locale: localeWithSuffix } =
+                dateFnsLocale.getLocaleWithSuffix();
+
+            expect(code).toEqual(expectedCode);
+            expect(localeWithSuffix.code).toEqual(expectedCode);
+        });
+
+        it('Should import "fr" locale', async () => {
+            const expectedCode = 'fr';
+
+            await dateFnsLocale.updateLocale('fr-fr');
+            const { code } = dateFnsLocale.getLocale();
+            const { locale: localeWithSuffix } =
+                dateFnsLocale.getLocaleWithSuffix();
+
+            expect(code).toEqual(expectedCode);
+            expect(localeWithSuffix.code).toEqual(expectedCode);
+        });
+
+        it('Should import "en-US" locale if given locale is not found', async () => {
+            const expectedCode = 'en-US';
+
+            await dateFnsLocale.updateLocale('unknown-unknown');
+            const { code } = dateFnsLocale.getLocale();
+            const { locale: localeWithSuffix } =
+                dateFnsLocale.getLocaleWithSuffix();
+
+            expect(code).toEqual(expectedCode);
+            expect(localeWithSuffix.code).toEqual(expectedCode);
+        });
+    });
+});
diff --git a/src/utils/events.test.ts b/src/utils/events.test.ts
new file mode 100644
index 0000000000..66f45561a8
--- /dev/null
+++ b/src/utils/events.test.ts
@@ -0,0 +1,89 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import eventsUtils from './events';
+
+describe('Utils: events', () => {
+    describe('Method: on', () => {
+        it('should throw error if object is null', () => {
+            const call = () => eventsUtils.on(null, 'testEvent', vi.fn());
+
+            expect(call).toThrowError(new Error('obj cannot be null!'));
+        });
+
+        it('should init object callbacks with testEvent type if it does not exist', () => {
+            const obj = {};
+            const callback = vi.fn();
+
+            eventsUtils.on(obj, 'testEvent', callback);
+
+            expect(obj).toHaveProperty('_callbacks', {
+                testEvent: [callback]
+            });
+        });
+
+        it('should add callback to existing object callbacks', () => {
+            const initialCallback = vi.fn();
+            const obj = {
+                _callbacks: { testEvent: [initialCallback] }
+            };
+            const otherCallback = vi.fn();
+
+            eventsUtils.on(obj, 'testEvent', otherCallback);
+
+            expect(obj).toHaveProperty('_callbacks', {
+                testEvent: [initialCallback, otherCallback]
+            });
+        });
+    });
+
+    describe('Method: off', () => {
+        let obj: object;
+        let initialCallback: ReturnType<typeof vi.fn>;
+        beforeEach(() => {
+            initialCallback = vi.fn();
+            obj = {
+                _callbacks: {
+                    testEvent: [initialCallback]
+                }
+            };
+        });
+
+        it('should remove existing callbacks', () => {
+            eventsUtils.off(obj, 'testEvent', initialCallback);
+
+            expect(obj).toHaveProperty('_callbacks', { testEvent: [] });
+        });
+        it('should not remove callback if it is not registered for the given event', () => {
+            eventsUtils.off(obj, 'otherEvent', initialCallback);
+
+            expect(obj).toHaveProperty('_callbacks', {
+                testEvent: [initialCallback],
+                otherEvent: []
+            });
+        });
+        it('should not remove callback if it is not registered', () => {
+            const callbackToRemove = vi.fn();
+
+            eventsUtils.off(obj, 'testEvent', callbackToRemove);
+
+            expect(obj).toHaveProperty('_callbacks', {
+                testEvent: [initialCallback]
+            });
+        });
+    });
+
+    describe('Method: trigger', () => {
+        it('should trigger registered callback with given parameters', () => {
+            const obj = {};
+            const callback = vi.fn();
+            eventsUtils.on(obj, 'testEvent', callback);
+
+            eventsUtils.trigger(obj, 'testEvent', ['testValue1', 'testValue2']);
+
+            expect(callback).toHaveBeenCalledWith(
+                { type: 'testEvent' },
+                'testValue1',
+                'testValue2'
+            );
+        });
+    });
+});