diff --git a/frontend/app/src/test/java/com/example/speechbuddy/viewmodel/ResetPasswordViewModelTest.kt b/frontend/app/src/test/java/com/example/speechbuddy/viewmodel/ResetPasswordViewModelTest.kt
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+++ b/frontend/app/src/test/java/com/example/speechbuddy/viewmodel/ResetPasswordViewModelTest.kt
@@ -0,0 +1,202 @@
+package com.example.speechbuddy.viewmodel
+
+import androidx.arch.core.executor.testing.InstantTaskExecutorRule
+import com.example.speechbuddy.R
+import com.example.speechbuddy.data.remote.requests.AuthResetPasswordRequest
+import com.example.speechbuddy.domain.SessionManager
+import com.example.speechbuddy.repository.AuthRepository
+import com.example.speechbuddy.ui.models.ResetPasswordErrorType
+import io.mockk.coEvery
+import io.mockk.coVerify
+import io.mockk.impl.annotations.MockK
+import io.mockk.mockk
+import junit.framework.TestCase.assertEquals
+import kotlinx.coroutines.DelicateCoroutinesApi
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.flowOf
+import kotlinx.coroutines.newSingleThreadContext
+import kotlinx.coroutines.test.resetMain
+import kotlinx.coroutines.test.setMain
+import okhttp3.ResponseBody.Companion.toResponseBody
+import org.junit.After
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import retrofit2.Response
+
+class ResetPasswordViewModelTest {
+    @OptIn(DelicateCoroutinesApi::class)
+    private val mainThreadSurrogate = newSingleThreadContext("UI thread")
+
+    @MockK
+    private val repository: AuthRepository = mockk()
+    private val sessionManager: SessionManager = mockk()
+    private lateinit var viewModel: ResetPasswordViewModel
+
+    private val validPassword = "123456789" //length >= 8
+    private val invalidPassword = "1234567" //length < 8
+    private val emptyPassword = ""
+    private val passwordList = arrayListOf(validPassword, invalidPassword, emptyPassword)
+    private val invalidPasswordList = arrayListOf(invalidPassword, emptyPassword)
+
+    @get:Rule
+    val instantExecutorRule = InstantTaskExecutorRule()
+
+    @OptIn(ExperimentalCoroutinesApi::class)
+    @Before
+    fun setup() {
+        Dispatchers.setMain(mainThreadSurrogate)
+        viewModel = ResetPasswordViewModel(repository, sessionManager)
+    }
+
+    @OptIn(ExperimentalCoroutinesApi::class)
+    @After
+    fun tearDown() {
+        Dispatchers.resetMain()
+        mainThreadSurrogate.close()
+    }
+
+    @Test
+    fun `should return no error when password is empty before click`() {
+        passwordList.forEach {
+            viewModel.setPassword(emptyPassword)
+            viewModel.setPasswordCheck(it)
+            assertEquals(viewModel.passwordInput, emptyPassword)
+            assertEquals(viewModel.passwordCheckInput, it)
+            assertEquals(viewModel.uiState.value.error?.type, null)
+            assertEquals(viewModel.uiState.value.isValidPassword, false)
+        }
+    }
+
+    @Test
+    fun `should return no error when password is valid before click`() {
+        passwordList.forEach {
+            viewModel.setPassword(validPassword)
+            viewModel.setPasswordCheck(it)
+            assertEquals(viewModel.passwordInput, validPassword)
+            assertEquals(viewModel.passwordCheckInput, it)
+            assertEquals(viewModel.uiState.value.error?.type, null)
+            assertEquals(viewModel.uiState.value.isValidPassword, false)
+        }
+    }
+
+    @Test
+    fun `should return no error when password is invalid before click`() {
+        passwordList.forEach {
+            viewModel.setPassword(invalidPassword)
+            viewModel.setPasswordCheck(it)
+            assertEquals(viewModel.passwordInput, invalidPassword)
+            assertEquals(viewModel.passwordCheckInput, it)
+            assertEquals(viewModel.uiState.value.error?.type, null)
+            assertEquals(viewModel.uiState.value.isValidPassword, false)
+        }
+    }
+
+    @Test
+    fun `should set error type PASSWORD when password is empty`() {
+        val onSuccess: () -> Unit = mockk(relaxed = true)
+        passwordList.forEach {
+            viewModel.setPassword(emptyPassword)
+            viewModel.setPasswordCheck(it)
+            viewModel.resetPassword(onSuccess)
+
+            assertEquals(viewModel.passwordInput, emptyPassword)
+            assertEquals(viewModel.passwordCheckInput, it)
+            assertEquals(viewModel.uiState.value.error?.type, ResetPasswordErrorType.PASSWORD)
+            assertEquals(viewModel.uiState.value.error?.messageId, R.string.no_password)
+            assertEquals(viewModel.uiState.value.isValidPassword, false)
+
+            viewModel.setPassword(validPassword)
+            assertEquals(viewModel.uiState.value.error?.type, null)
+            assertEquals(viewModel.uiState.value.isValidPassword, true)
+        }
+    } //covers both cases when password equals password check, or not
+
+    @Test
+    fun `should set error type PASSWORD when password is invalid`() {
+        val onSuccess: () -> Unit = mockk(relaxed = true)
+        passwordList.forEach {
+            viewModel.setPassword(invalidPassword)
+            viewModel.setPasswordCheck(it)
+            viewModel.resetPassword(onSuccess)
+
+            assertEquals(viewModel.passwordInput, invalidPassword)
+            assertEquals(viewModel.passwordCheckInput, it)
+            assertEquals(viewModel.uiState.value.error?.type, ResetPasswordErrorType.PASSWORD)
+            assertEquals(viewModel.uiState.value.error?.messageId, R.string.password_too_short)
+            assertEquals(viewModel.uiState.value.isValidPassword, false)
+
+            viewModel.setPassword(validPassword)
+            assertEquals(viewModel.uiState.value.error?.type, null)
+            assertEquals(viewModel.uiState.value.isValidPassword, true)
+            //checks whether validatePassword works well when changing the password into a valid one
+        }
+    } //covers both cases when password equals password check, or not
+
+    @Test
+    fun `should set error type PASSWORD_CHECK when password is valid`() {
+        val onSuccess: () -> Unit = mockk(relaxed = true)
+        invalidPasswordList.forEach {
+            viewModel.setPassword(validPassword)
+            viewModel.setPasswordCheck(it)
+            viewModel.resetPassword(onSuccess)
+
+            assertEquals(viewModel.passwordInput, validPassword)
+            assertEquals(viewModel.passwordCheckInput, it)
+            assertEquals(viewModel.uiState.value.error?.type, ResetPasswordErrorType.PASSWORD_CHECK)
+            assertEquals(viewModel.uiState.value.error?.messageId, R.string.wrong_password_check)
+            assertEquals(viewModel.uiState.value.isValidPassword, false)
+            //isValidPassword doesn't turn true when password was valid from the start
+        }
+    }
+
+    @Test
+    fun `should success when password is valid and equals password check`() {
+        val onSuccess: () -> Unit = mockk(relaxed = true)
+        viewModel.setPassword(validPassword)
+        viewModel.setPasswordCheck(validPassword)
+        coEvery {
+            repository.resetPassword(AuthResetPasswordRequest(validPassword))
+        } returns flowOf(Response.success(null))
+        viewModel.resetPassword(onSuccess)
+        Thread.sleep(10)
+
+        assertEquals(viewModel.uiState.value.error?.type, null)
+        coVerify { sessionManager.deleteToken() }
+    }
+
+    @Test
+    fun `should fail when bad request occurs`() {
+        val onSuccess: () -> Unit = mockk(relaxed = true)
+        val errorResponseBody = "Error message or JSON here".toResponseBody(null)
+        val errorResponse: Response<Void> = Response.error(400, errorResponseBody)
+        viewModel.setPassword(validPassword)
+        viewModel.setPasswordCheck(validPassword)
+        coEvery {
+            repository.resetPassword(AuthResetPasswordRequest(validPassword))
+        } returns flowOf(errorResponse)
+        viewModel.resetPassword(onSuccess)
+        Thread.sleep(10)
+
+        assertEquals(viewModel.uiState.value.error?.type, ResetPasswordErrorType.PASSWORD)
+        assertEquals(viewModel.uiState.value.error?.messageId, R.string.unknown_error)
+    }
+
+    @Test
+    fun `should fail when no internet connection`() {
+        val onSuccess: () -> Unit = mockk(relaxed = true)
+        val errorResponseBody = "Error message or JSON here".toResponseBody(null)
+        val errorResponse: Response<Void> = Response.error(600, errorResponseBody)
+        viewModel.setPassword(validPassword)
+        viewModel.setPasswordCheck(validPassword)
+        coEvery {
+            repository.resetPassword(AuthResetPasswordRequest(validPassword))
+        } returns flowOf(errorResponse)
+        viewModel.resetPassword(onSuccess)
+        Thread.sleep(10)
+
+        assertEquals(viewModel.uiState.value.error?.type, ResetPasswordErrorType.CONNECTION)
+        assertEquals(viewModel.uiState.value.error?.messageId, R.string.connection_error)
+    }
+}
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