diff --git a/src/forms/registration-popup/data/tests/reducer.test.js b/src/forms/registration-popup/data/tests/reducer.test.js
index 552bbeac..815caa4e 100644
--- a/src/forms/registration-popup/data/tests/reducer.test.js
+++ b/src/forms/registration-popup/data/tests/reducer.test.js
@@ -1,13 +1,20 @@
 import {
-  COMPLETE_STATE, DEFAULT_STATE, PENDING_STATE,
+  COMPLETE_STATE,
+  DEFAULT_STATE,
+  PENDING_STATE,
 } from '../../../../data/constants';
 import registerReducer, {
+  backupRegistrationForm,
   clearAllRegistrationErrors,
   clearRegistrationBackendError,
   fetchRealtimeValidations,
   fetchRealtimeValidationsFailed,
   fetchRealtimeValidationsSuccess,
   registerInitialState,
+  registerUser,
+  registerUserFailed,
+  registerUserSuccess,
+  setRegistrationFields,
 } from '../reducers';
 
 describe('registerSlice reducer', () => {
@@ -19,7 +26,7 @@ describe('registerSlice reducer', () => {
     const nextState = registerReducer(registerInitialState, fetchRealtimeValidations());
 
     expect(nextState.validationState).toEqual(PENDING_STATE);
-    expect(nextState.validations).toEqual(null);
+    expect(nextState.validations).toBeNull();
   });
 
   it('should handle fetchRealtimeValidationsSuccess action', () => {
@@ -43,7 +50,7 @@ describe('registerSlice reducer', () => {
   });
 
   it('should handle clearRegistrationBackendError action', () => {
-    const nextState = registerReducer({
+    const initialStateWithErrors = {
       ...registerInitialState,
       registrationError: {
         email: [
@@ -53,14 +60,15 @@ describe('registerSlice reducer', () => {
         ],
         errorCode: 'duplicate-email',
       },
+    };
 
-    }, clearRegistrationBackendError('email'));
+    const nextState = registerReducer(initialStateWithErrors, clearRegistrationBackendError('email'));
 
     expect(nextState.registrationError).toEqual({ errorCode: 'duplicate-email' });
   });
 
   it('should handle clearAllRegistrationErrors action', () => {
-    const nextState = registerReducer({
+    const initialStateWithErrors = {
       ...registerInitialState,
       registrationError: {
         email: [
@@ -70,9 +78,53 @@ describe('registerSlice reducer', () => {
         ],
         errorCode: 'duplicate-email',
       },
+    };
+
+    const nextState = registerReducer(initialStateWithErrors, clearAllRegistrationErrors());
+
+    expect(nextState.registrationError).toEqual({});
+  });
 
-    }, clearAllRegistrationErrors());
+  it('should handle registerUser action', () => {
+    const nextState = registerReducer(registerInitialState, registerUser());
 
+    expect(nextState.submitState).toEqual(PENDING_STATE);
     expect(nextState.registrationError).toEqual({});
   });
+
+  it('should handle registerUserSuccess action', () => {
+    const mockPayload = { user: 'testUser' };
+    const nextState = registerReducer(registerInitialState, registerUserSuccess(mockPayload));
+
+    expect(nextState.submitState).toEqual(COMPLETE_STATE);
+    expect(nextState.registrationResult).toEqual(mockPayload);
+  });
+
+  it('should handle registerUserFailed action', () => {
+    const mockPayload = { error: 'Some error occurred' };
+    const nextState = registerReducer(registerInitialState, registerUserFailed(mockPayload));
+
+    expect(nextState.submitState).toEqual(DEFAULT_STATE);
+    expect(nextState.registrationError).toEqual(mockPayload);
+    expect(nextState.registrationResult).toEqual({});
+    expect(nextState.validations).toBeNull();
+  });
+
+  it('should handle setRegistrationFields action', () => {
+    const mockPayload = { marketingEmailsOptIn: false };
+    const nextState = registerReducer(registerInitialState, setRegistrationFields(mockPayload));
+
+    expect(nextState.registrationFields).toEqual(mockPayload);
+  });
+
+  it('should handle backupRegistrationForm action', () => {
+    const mockPayload = {
+      isFormFilled: true,
+      formFields: { name: 'John Doe', email: 'john@example.com', password: 'password123' },
+      errors: { name: '', email: '', password: '' },
+    };
+    const nextState = registerReducer(registerInitialState, backupRegistrationForm(mockPayload));
+
+    expect(nextState.registrationFormData).toEqual(mockPayload);
+  });
 });
diff --git a/src/forms/registration-popup/data/tests/service.test.js b/src/forms/registration-popup/data/tests/service.test.js
index b63a1b9b..651ab916 100644
--- a/src/forms/registration-popup/data/tests/service.test.js
+++ b/src/forms/registration-popup/data/tests/service.test.js
@@ -1,14 +1,14 @@
 import { getConfig } from '@edx/frontend-platform';
 import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 
-import { getFieldsValidations } from '../service';
+import registerRequest, { getFieldsValidations } from '../service';
 
 jest.mock('@edx/frontend-platform/auth');
 jest.mock('@edx/frontend-platform', () => ({
   getConfig: jest.fn(() => ({ LMS_BASE_URL: 'http://example.com' })),
 }));
 
-describe('getFieldsValidations Tests', () => {
+describe('Service Function Tests', () => {
   const mockGetAuthenticatedHttpClient = jest.fn();
   getAuthenticatedHttpClient.mockReturnValue({ post: mockGetAuthenticatedHttpClient });
 
@@ -16,34 +16,69 @@ describe('getFieldsValidations Tests', () => {
     jest.clearAllMocks();
   });
 
-  it('should return backend validation message and success status if request succeeds', async () => {
-    const mockCreds = {
-      email: 'test@example.com',
-    };
-    const mockData = {
-      validation_decisions: {
-        email: 'This email is already associated with an existing or previous edX account',
-      },
-    };
+  describe('getFieldsValidations Tests', () => {
+    it('should return backend validation message if request succeeds', async () => {
+      const mockCreds = { email: 'test@example.com' };
+      const mockData = {
+        validation_decisions: {
+          email: 'This email is already associated with an existing or previous edX account',
+        },
+      };
 
-    mockGetAuthenticatedHttpClient.mockResolvedValue({ data: mockData });
+      mockGetAuthenticatedHttpClient.mockResolvedValue({ data: mockData });
 
-    const result = await getFieldsValidations(mockCreds);
+      const result = await getFieldsValidations(mockCreds);
 
-    expect(result).toEqual({ fieldValidations: mockData });
+      expect(result).toEqual({ fieldValidations: mockData });
+    });
+
+    it('should throw an error if the request fails', async () => {
+      const mockCreds = { email: 'test@example.com' };
+      const errorMessage = 'Validation request failed';
+
+      mockGetAuthenticatedHttpClient.mockRejectedValue(new Error(errorMessage));
+
+      await expect(getFieldsValidations(mockCreds)).rejects.toThrow(errorMessage);
+      expect(getConfig).toHaveBeenCalled();
+      expect(mockGetAuthenticatedHttpClient).toHaveBeenCalled();
+    });
   });
 
-  it('should throw an error if the request fails', async () => {
-    const mockCreds = {
-      email: 'test@example.com',
-    };
-    const errorMessage = 'Login request failed';
+  describe('registerRequest Tests', () => {
+    it('should return redirect URL, success status, and authenticated user details if request succeeds', async () => {
+      const mockRegistrationInfo = {
+        email: 'test@example.com',
+        password: 'password123',
+      };
+      const mockData = {
+        redirect_url: 'http://example.com/dashboard',
+        success: true,
+        authenticated_user: {
+          username: 'testuser',
+        },
+      };
+
+      mockGetAuthenticatedHttpClient.mockResolvedValue({ data: mockData });
+
+      const result = await registerRequest(mockRegistrationInfo);
+
+      expect(result).toEqual({
+        redirectUrl: mockData.redirect_url,
+        success: mockData.success,
+        authenticatedUser: mockData.authenticated_user,
+      });
+    });
 
-    mockGetAuthenticatedHttpClient.mockRejectedValue(new Error(errorMessage));
+    it('should throw an error if the request fails', async () => {
+      const mockRegistrationInfo = {
+        email: 'test@example.com',
+        password: 'password123',
+      };
+      const errorMessage = 'Registration request failed';
 
-    await expect(getFieldsValidations(mockCreds)).rejects.toThrow(errorMessage);
+      mockGetAuthenticatedHttpClient.mockRejectedValue(new Error(errorMessage));
 
-    expect(getConfig).toHaveBeenCalled();
-    expect(mockGetAuthenticatedHttpClient).toHaveBeenCalled();
+      await expect(registerRequest(mockRegistrationInfo)).rejects.toThrow(errorMessage);
+    });
   });
 });