diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 972f953890..afd37736f2 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -113,7 +113,7 @@ dependencies {
 
     testImplementation(projects.core.dataTest)
     testImplementation(projects.core.testing)
-    testImplementation(libs.accompanist.testharness)
+    testImplementation(libs.androidx.compose.ui.test)
     testImplementation(libs.hilt.android.testing)
     testImplementation(libs.work.testing)
 
@@ -126,7 +126,7 @@ dependencies {
     androidTestImplementation(projects.core.datastoreTest)
     androidTestImplementation(libs.androidx.test.espresso.core)
     androidTestImplementation(libs.androidx.navigation.testing)
-    androidTestImplementation(libs.accompanist.testharness)
+    androidTestImplementation(libs.androidx.compose.ui.test)
     androidTestImplementation(libs.hilt.android.testing)
 
     baselineProfile(projects.benchmarks)
diff --git a/app/src/androidTest/kotlin/com/google/samples/apps/nowinandroid/ui/NavigationUiTest.kt b/app/src/androidTest/kotlin/com/google/samples/apps/nowinandroid/ui/NavigationUiTest.kt
index 5d2e12b5c5..03cf653aef 100644
--- a/app/src/androidTest/kotlin/com/google/samples/apps/nowinandroid/ui/NavigationUiTest.kt
+++ b/app/src/androidTest/kotlin/com/google/samples/apps/nowinandroid/ui/NavigationUiTest.kt
@@ -20,13 +20,14 @@ import androidx.compose.foundation.layout.BoxWithConstraints
 import androidx.compose.material3.windowsizeclass.ExperimentalMaterial3WindowSizeClassApi
 import androidx.compose.material3.windowsizeclass.WindowSizeClass
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.test.DeviceConfigurationOverride
+import androidx.compose.ui.test.ForcedSize
 import androidx.compose.ui.test.assertIsDisplayed
 import androidx.compose.ui.test.junit4.createAndroidComposeRule
 import androidx.compose.ui.test.onNodeWithTag
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.DpSize
 import androidx.compose.ui.unit.dp
-import com.google.accompanist.testharness.TestHarness
 import com.google.samples.apps.nowinandroid.core.data.repository.CompositeUserNewsResourceRepository
 import com.google.samples.apps.nowinandroid.core.data.util.NetworkMonitor
 import com.google.samples.apps.nowinandroid.core.data.util.TimeZoneMonitor
@@ -95,7 +96,9 @@ class NavigationUiTest {
     @Test
     fun compactWidth_compactHeight_showsNavigationBar() {
         composeTestRule.setContent {
-            TestHarness(size = DpSize(400.dp, 400.dp)) {
+            DeviceConfigurationOverride(
+                DeviceConfigurationOverride.ForcedSize(DpSize(400.dp, 400.dp)),
+            ) {
                 BoxWithConstraints {
                     NiaApp(fakeAppState(maxWidth, maxHeight))
                 }
@@ -109,7 +112,9 @@ class NavigationUiTest {
     @Test
     fun mediumWidth_compactHeight_showsNavigationRail() {
         composeTestRule.setContent {
-            TestHarness(size = DpSize(610.dp, 400.dp)) {
+            DeviceConfigurationOverride(
+                DeviceConfigurationOverride.ForcedSize(DpSize(610.dp, 400.dp)),
+            ) {
                 BoxWithConstraints {
                     NiaApp(fakeAppState(maxWidth, maxHeight))
                 }
@@ -123,7 +128,9 @@ class NavigationUiTest {
     @Test
     fun expandedWidth_compactHeight_showsNavigationRail() {
         composeTestRule.setContent {
-            TestHarness(size = DpSize(900.dp, 400.dp)) {
+            DeviceConfigurationOverride(
+                DeviceConfigurationOverride.ForcedSize(DpSize(900.dp, 400.dp)),
+            ) {
                 BoxWithConstraints {
                     NiaApp(fakeAppState(maxWidth, maxHeight))
                 }
@@ -137,7 +144,9 @@ class NavigationUiTest {
     @Test
     fun compactWidth_mediumHeight_showsNavigationBar() {
         composeTestRule.setContent {
-            TestHarness(size = DpSize(400.dp, 500.dp)) {
+            DeviceConfigurationOverride(
+                DeviceConfigurationOverride.ForcedSize(DpSize(400.dp, 500.dp)),
+            ) {
                 BoxWithConstraints {
                     NiaApp(fakeAppState(maxWidth, maxHeight))
                 }
@@ -151,7 +160,9 @@ class NavigationUiTest {
     @Test
     fun mediumWidth_mediumHeight_showsNavigationRail() {
         composeTestRule.setContent {
-            TestHarness(size = DpSize(610.dp, 500.dp)) {
+            DeviceConfigurationOverride(
+                DeviceConfigurationOverride.ForcedSize(DpSize(610.dp, 500.dp)),
+            ) {
                 BoxWithConstraints {
                     NiaApp(fakeAppState(maxWidth, maxHeight))
                 }
@@ -165,7 +176,9 @@ class NavigationUiTest {
     @Test
     fun expandedWidth_mediumHeight_showsNavigationRail() {
         composeTestRule.setContent {
-            TestHarness(size = DpSize(900.dp, 500.dp)) {
+            DeviceConfigurationOverride(
+                DeviceConfigurationOverride.ForcedSize(DpSize(900.dp, 500.dp)),
+            ) {
                 BoxWithConstraints {
                     NiaApp(fakeAppState(maxWidth, maxHeight))
                 }
@@ -179,7 +192,9 @@ class NavigationUiTest {
     @Test
     fun compactWidth_expandedHeight_showsNavigationBar() {
         composeTestRule.setContent {
-            TestHarness(size = DpSize(400.dp, 1000.dp)) {
+            DeviceConfigurationOverride(
+                DeviceConfigurationOverride.ForcedSize(DpSize(400.dp, 1000.dp)),
+            ) {
                 BoxWithConstraints {
                     NiaApp(fakeAppState(maxWidth, maxHeight))
                 }
@@ -193,7 +208,9 @@ class NavigationUiTest {
     @Test
     fun mediumWidth_expandedHeight_showsNavigationRail() {
         composeTestRule.setContent {
-            TestHarness(size = DpSize(610.dp, 1000.dp)) {
+            DeviceConfigurationOverride(
+                DeviceConfigurationOverride.ForcedSize(DpSize(610.dp, 1000.dp)),
+            ) {
                 BoxWithConstraints {
                     NiaApp(fakeAppState(maxWidth, maxHeight))
                 }
@@ -207,7 +224,9 @@ class NavigationUiTest {
     @Test
     fun expandedWidth_expandedHeight_showsNavigationRail() {
         composeTestRule.setContent {
-            TestHarness(size = DpSize(900.dp, 1000.dp)) {
+            DeviceConfigurationOverride(
+                DeviceConfigurationOverride.ForcedSize(DpSize(900.dp, 1000.dp)),
+            ) {
                 BoxWithConstraints {
                     NiaApp(fakeAppState(maxWidth, maxHeight))
                 }
diff --git a/app/src/main/kotlin/com/google/samples/apps/nowinandroid/ui/NiaApp.kt b/app/src/main/kotlin/com/google/samples/apps/nowinandroid/ui/NiaApp.kt
index 51c98cec6f..8cbabc247b 100644
--- a/app/src/main/kotlin/com/google/samples/apps/nowinandroid/ui/NiaApp.kt
+++ b/app/src/main/kotlin/com/google/samples/apps/nowinandroid/ui/NiaApp.kt
@@ -76,12 +76,12 @@ import com.google.samples.apps.nowinandroid.navigation.TopLevelDestination
 import com.google.samples.apps.nowinandroid.feature.settings.R as settingsR
 
 @Composable
-fun NiaApp(appState: NiaAppState) {
+fun NiaApp(appState: NiaAppState, modifier: Modifier = Modifier) {
     val shouldShowGradientBackground =
         appState.currentTopLevelDestination == TopLevelDestination.FOR_YOU
     var showSettingsDialog by rememberSaveable { mutableStateOf(false) }
 
-    NiaBackground {
+    NiaBackground(modifier = modifier) {
         NiaGradientBackground(
             gradientColors = if (shouldShowGradientBackground) {
                 LocalGradientColors.current
diff --git a/app/src/testDemo/kotlin/com/google/samples/apps/nowinandroid/ui/NiaAppScreenSizesScreenshotTests.kt b/app/src/testDemo/kotlin/com/google/samples/apps/nowinandroid/ui/NiaAppScreenSizesScreenshotTests.kt
index 83ca1bb3dc..e843352468 100644
--- a/app/src/testDemo/kotlin/com/google/samples/apps/nowinandroid/ui/NiaAppScreenSizesScreenshotTests.kt
+++ b/app/src/testDemo/kotlin/com/google/samples/apps/nowinandroid/ui/NiaAppScreenSizesScreenshotTests.kt
@@ -17,11 +17,12 @@
 package com.google.samples.apps.nowinandroid.ui
 
 import android.util.Log
-import androidx.compose.foundation.layout.BoxWithConstraints
 import androidx.compose.material3.windowsizeclass.ExperimentalMaterial3WindowSizeClassApi
 import androidx.compose.material3.windowsizeclass.WindowSizeClass
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.ui.platform.LocalInspectionMode
+import androidx.compose.ui.test.DeviceConfigurationOverride
+import androidx.compose.ui.test.ForcedSize
 import androidx.compose.ui.test.junit4.createAndroidComposeRule
 import androidx.compose.ui.test.onRoot
 import androidx.compose.ui.unit.Dp
@@ -32,7 +33,6 @@ import androidx.work.Configuration
 import androidx.work.testing.SynchronousExecutor
 import androidx.work.testing.WorkManagerTestInitHelper
 import com.github.takahirom.roborazzi.captureRoboImage
-import com.google.accompanist.testharness.TestHarness
 import com.google.samples.apps.nowinandroid.core.data.repository.TopicsRepository
 import com.google.samples.apps.nowinandroid.core.data.repository.UserDataRepository
 import com.google.samples.apps.nowinandroid.core.data.repository.UserNewsResourceRepository
@@ -143,19 +143,19 @@ class NiaAppScreenSizesScreenshotTests {
             CompositionLocalProvider(
                 LocalInspectionMode provides true,
             ) {
-                TestHarness(size = DpSize(width, height)) {
-                    BoxWithConstraints {
-                        NiaTheme {
-                            val fakeAppState = rememberNiaAppState(
-                                windowSizeClass = WindowSizeClass.calculateFromSize(
-                                    DpSize(maxWidth, maxHeight),
-                                ),
-                                networkMonitor = networkMonitor,
-                                userNewsResourceRepository = userNewsResourceRepository,
-                                timeZoneMonitor = timeZoneMonitor,
-                            )
-                            NiaApp(fakeAppState)
-                        }
+                DeviceConfigurationOverride(
+                    override = DeviceConfigurationOverride.ForcedSize(DpSize(width, height)),
+                ) {
+                    NiaTheme {
+                        val fakeAppState = rememberNiaAppState(
+                            windowSizeClass = WindowSizeClass.calculateFromSize(
+                                DpSize(width, height),
+                            ),
+                            networkMonitor = networkMonitor,
+                            userNewsResourceRepository = userNewsResourceRepository,
+                            timeZoneMonitor = timeZoneMonitor,
+                        )
+                        NiaApp(fakeAppState)
                     }
                 }
             }
diff --git a/app/src/testDemo/kotlin/com/google/samples/apps/nowinandroid/ui/SnackbarScreenshotTests.kt b/app/src/testDemo/kotlin/com/google/samples/apps/nowinandroid/ui/SnackbarScreenshotTests.kt
index fa1ba1036a..c3ad185912 100644
--- a/app/src/testDemo/kotlin/com/google/samples/apps/nowinandroid/ui/SnackbarScreenshotTests.kt
+++ b/app/src/testDemo/kotlin/com/google/samples/apps/nowinandroid/ui/SnackbarScreenshotTests.kt
@@ -23,6 +23,8 @@ import androidx.compose.material3.SnackbarHostState
 import androidx.compose.material3.windowsizeclass.ExperimentalMaterial3WindowSizeClassApi
 import androidx.compose.material3.windowsizeclass.WindowSizeClass
 import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.ui.test.DeviceConfigurationOverride
+import androidx.compose.ui.test.ForcedSize
 import androidx.compose.ui.test.junit4.createAndroidComposeRule
 import androidx.compose.ui.test.onRoot
 import androidx.compose.ui.unit.Dp
@@ -33,7 +35,6 @@ import androidx.work.Configuration
 import androidx.work.testing.SynchronousExecutor
 import androidx.work.testing.WorkManagerTestInitHelper
 import com.github.takahirom.roborazzi.captureRoboImage
-import com.google.accompanist.testharness.TestHarness
 import com.google.samples.apps.nowinandroid.core.data.repository.TopicsRepository
 import com.google.samples.apps.nowinandroid.core.data.repository.UserNewsResourceRepository
 import com.google.samples.apps.nowinandroid.core.data.test.repository.FakeUserDataRepository
@@ -208,7 +209,9 @@ class SnackbarScreenshotTests {
         composeTestRule.setContent {
             scope = rememberCoroutineScope()
 
-            TestHarness(size = DpSize(width, height)) {
+            DeviceConfigurationOverride(
+                DeviceConfigurationOverride.ForcedSize(DpSize(width, height)),
+            ) {
                 BoxWithConstraints {
                     val appState = rememberNiaAppState(
                         windowSizeClass = WindowSizeClass.calculateFromSize(
diff --git a/app/src/testDemo/screenshots/compactWidth_expandedHeight_showsNavigationBar.png b/app/src/testDemo/screenshots/compactWidth_expandedHeight_showsNavigationBar.png
index 1c9213f3e5..279efe6d0e 100644
Binary files a/app/src/testDemo/screenshots/compactWidth_expandedHeight_showsNavigationBar.png and b/app/src/testDemo/screenshots/compactWidth_expandedHeight_showsNavigationBar.png differ
diff --git a/app/src/testDemo/screenshots/expandedWidth_expandedHeight_showsNavigationRail.png b/app/src/testDemo/screenshots/expandedWidth_expandedHeight_showsNavigationRail.png
index 70af31fa71..53bf6f3c5e 100644
Binary files a/app/src/testDemo/screenshots/expandedWidth_expandedHeight_showsNavigationRail.png and b/app/src/testDemo/screenshots/expandedWidth_expandedHeight_showsNavigationRail.png differ
diff --git a/app/src/testDemo/screenshots/mediumWidth_expandedHeight_showsNavigationRail.png b/app/src/testDemo/screenshots/mediumWidth_expandedHeight_showsNavigationRail.png
index 233718a57c..3e38938d63 100644
Binary files a/app/src/testDemo/screenshots/mediumWidth_expandedHeight_showsNavigationRail.png and b/app/src/testDemo/screenshots/mediumWidth_expandedHeight_showsNavigationRail.png differ
diff --git a/core/designsystem/build.gradle.kts b/core/designsystem/build.gradle.kts
index 548e635bb0..cf3e4c51f8 100644
--- a/core/designsystem/build.gradle.kts
+++ b/core/designsystem/build.gradle.kts
@@ -40,7 +40,6 @@ dependencies {
     implementation(libs.coil.kt.compose)
 
     testImplementation(libs.androidx.compose.ui.test)
-    testImplementation(libs.accompanist.testharness)
     testImplementation(libs.hilt.android.testing)
     testImplementation(libs.robolectric)
     testImplementation(libs.roborazzi)
diff --git a/core/designsystem/src/main/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/icon/NiaIcons.kt b/core/designsystem/src/main/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/icon/NiaIcons.kt
index 6b77f73943..dfa68e772b 100644
--- a/core/designsystem/src/main/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/icon/NiaIcons.kt
+++ b/core/designsystem/src/main/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/icon/NiaIcons.kt
@@ -23,7 +23,6 @@ import androidx.compose.material.icons.filled.MoreVert
 import androidx.compose.material.icons.outlined.Bookmarks
 import androidx.compose.material.icons.outlined.Upcoming
 import androidx.compose.material.icons.rounded.Add
-import androidx.compose.material.icons.rounded.ArrowBack
 import androidx.compose.material.icons.rounded.Bookmark
 import androidx.compose.material.icons.rounded.BookmarkBorder
 import androidx.compose.material.icons.rounded.Bookmarks
@@ -33,7 +32,6 @@ import androidx.compose.material.icons.rounded.Grid3x3
 import androidx.compose.material.icons.rounded.Person
 import androidx.compose.material.icons.rounded.Search
 import androidx.compose.material.icons.rounded.Settings
-import androidx.compose.material.icons.rounded.ShortText
 import androidx.compose.material.icons.rounded.Upcoming
 import androidx.compose.material.icons.rounded.ViewDay
 import androidx.compose.ui.graphics.vector.ImageVector
diff --git a/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/FilterChipScreenshotTests.kt b/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/FilterChipScreenshotTests.kt
index 92d5467aec..7a6a92a1d1 100644
--- a/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/FilterChipScreenshotTests.kt
+++ b/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/FilterChipScreenshotTests.kt
@@ -21,12 +21,15 @@ import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.ui.platform.LocalInspectionMode
+import androidx.compose.ui.test.DeviceConfigurationOverride
+import androidx.compose.ui.test.FontScale
+import androidx.compose.ui.test.ForcedSize
 import androidx.compose.ui.test.junit4.createAndroidComposeRule
 import androidx.compose.ui.test.onRoot
+import androidx.compose.ui.test.then
 import androidx.compose.ui.unit.DpSize
 import androidx.compose.ui.unit.dp
 import com.github.takahirom.roborazzi.captureRoboImage
-import com.google.accompanist.testharness.TestHarness
 import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaBackground
 import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaFilterChip
 import com.google.samples.apps.nowinandroid.core.designsystem.theme.NiaTheme
@@ -78,7 +81,10 @@ class FilterChipScreenshotTests {
             CompositionLocalProvider(
                 LocalInspectionMode provides true,
             ) {
-                TestHarness(fontScale = 2f, size = DpSize(80.dp, 40.dp)) {
+                DeviceConfigurationOverride(
+                    DeviceConfigurationOverride.FontScale(2f) then
+                        DeviceConfigurationOverride.ForcedSize(DpSize(80.dp, 40.dp)),
+                ) {
                     NiaTheme {
                         NiaBackground {
                             NiaFilterChip(selected = true, onSelectedChange = {}) {
diff --git a/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/NavigationScreenshotTests.kt b/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/NavigationScreenshotTests.kt
index 1d1e70f7de..be2c6fa28a 100644
--- a/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/NavigationScreenshotTests.kt
+++ b/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/NavigationScreenshotTests.kt
@@ -23,10 +23,11 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.ui.platform.LocalInspectionMode
+import androidx.compose.ui.test.DeviceConfigurationOverride
+import androidx.compose.ui.test.FontScale
 import androidx.compose.ui.test.junit4.createAndroidComposeRule
 import androidx.compose.ui.test.onRoot
 import com.github.takahirom.roborazzi.captureRoboImage
-import com.google.accompanist.testharness.TestHarness
 import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaNavigationBar
 import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaNavigationBarItem
 import com.google.samples.apps.nowinandroid.core.designsystem.icon.NiaIcons
@@ -66,7 +67,9 @@ class NavigationScreenshotTests {
             CompositionLocalProvider(
                 LocalInspectionMode provides true,
             ) {
-                TestHarness(fontScale = 2f) {
+                DeviceConfigurationOverride(
+                    DeviceConfigurationOverride.FontScale(2f),
+                ) {
                     NiaTheme {
                         NiaNavigationBarExample("Looong item")
                     }
diff --git a/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/TabsScreenshotTests.kt b/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/TabsScreenshotTests.kt
index 19f7bea876..8ab711505d 100644
--- a/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/TabsScreenshotTests.kt
+++ b/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/TabsScreenshotTests.kt
@@ -22,10 +22,11 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.ui.platform.LocalInspectionMode
+import androidx.compose.ui.test.DeviceConfigurationOverride
+import androidx.compose.ui.test.FontScale
 import androidx.compose.ui.test.junit4.createAndroidComposeRule
 import androidx.compose.ui.test.onRoot
 import com.github.takahirom.roborazzi.captureRoboImage
-import com.google.accompanist.testharness.TestHarness
 import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaTab
 import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaTabRow
 import com.google.samples.apps.nowinandroid.core.designsystem.theme.NiaTheme
@@ -62,7 +63,9 @@ class TabsScreenshotTests {
             CompositionLocalProvider(
                 LocalInspectionMode provides true,
             ) {
-                TestHarness(fontScale = 2f) {
+                DeviceConfigurationOverride(
+                    DeviceConfigurationOverride.FontScale(2f),
+                ) {
                     NiaTheme {
                         NiaTabsExample("Looooong item")
                     }
diff --git a/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/TagScreenshotTests.kt b/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/TagScreenshotTests.kt
index d18f7dec59..8a519942dd 100644
--- a/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/TagScreenshotTests.kt
+++ b/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/TagScreenshotTests.kt
@@ -20,10 +20,11 @@ import androidx.activity.ComponentActivity
 import androidx.compose.material3.Text
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.ui.platform.LocalInspectionMode
+import androidx.compose.ui.test.DeviceConfigurationOverride
+import androidx.compose.ui.test.FontScale
 import androidx.compose.ui.test.junit4.createAndroidComposeRule
 import androidx.compose.ui.test.onRoot
 import com.github.takahirom.roborazzi.captureRoboImage
-import com.google.accompanist.testharness.TestHarness
 import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaTopicTag
 import com.google.samples.apps.nowinandroid.core.designsystem.theme.NiaTheme
 import com.google.samples.apps.nowinandroid.core.testing.util.DefaultRoborazziOptions
@@ -61,7 +62,9 @@ class TagScreenshotTests {
             CompositionLocalProvider(
                 LocalInspectionMode provides true,
             ) {
-                TestHarness(fontScale = 2f) {
+                DeviceConfigurationOverride(
+                    DeviceConfigurationOverride.Companion.FontScale(2f),
+                ) {
                     NiaTheme {
                         NiaTopicTag(followed = true, onClick = {}) {
                             Text("LOOOOONG TOPIC")
diff --git a/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/TopAppBarScreenshotTests.kt b/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/TopAppBarScreenshotTests.kt
index 325d9a501b..5988ed592c 100644
--- a/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/TopAppBarScreenshotTests.kt
+++ b/core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/TopAppBarScreenshotTests.kt
@@ -16,16 +16,16 @@
 
 package com.google.samples.apps.nowinandroid.core.designsystem
 
-import android.R.string
 import androidx.activity.ComponentActivity
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.ui.platform.LocalInspectionMode
+import androidx.compose.ui.test.DeviceConfigurationOverride
+import androidx.compose.ui.test.FontScale
 import androidx.compose.ui.test.junit4.createAndroidComposeRule
 import androidx.compose.ui.test.onRoot
 import com.github.takahirom.roborazzi.captureRoboImage
-import com.google.accompanist.testharness.TestHarness
 import com.google.samples.apps.nowinandroid.core.designsystem.component.NiaTopAppBar
 import com.google.samples.apps.nowinandroid.core.designsystem.icon.NiaIcons
 import com.google.samples.apps.nowinandroid.core.designsystem.theme.NiaTheme
@@ -63,7 +63,9 @@ class TopAppBarScreenshotTests {
             CompositionLocalProvider(
                 LocalInspectionMode provides true,
             ) {
-                TestHarness(fontScale = 2f) {
+                DeviceConfigurationOverride(
+                    DeviceConfigurationOverride.FontScale(2f),
+                ) {
                     NiaTheme {
                         NiaTopAppBarExample()
                     }
diff --git a/core/designsystem/src/test/screenshots/LoadingWheel/LoadingWheel_animation_115.png b/core/designsystem/src/test/screenshots/LoadingWheel/LoadingWheel_animation_115.png
index 6d023a207e..5aa1eb89ad 100644
Binary files a/core/designsystem/src/test/screenshots/LoadingWheel/LoadingWheel_animation_115.png and b/core/designsystem/src/test/screenshots/LoadingWheel/LoadingWheel_animation_115.png differ
diff --git a/core/designsystem/src/test/screenshots/LoadingWheel/LoadingWheel_animation_20.png b/core/designsystem/src/test/screenshots/LoadingWheel/LoadingWheel_animation_20.png
index c125faccf6..74309056f7 100644
Binary files a/core/designsystem/src/test/screenshots/LoadingWheel/LoadingWheel_animation_20.png and b/core/designsystem/src/test/screenshots/LoadingWheel/LoadingWheel_animation_20.png differ
diff --git a/core/screenshot-testing/build.gradle.kts b/core/screenshot-testing/build.gradle.kts
index 4e9a931b02..fb23cf0577 100644
--- a/core/screenshot-testing/build.gradle.kts
+++ b/core/screenshot-testing/build.gradle.kts
@@ -25,7 +25,7 @@ android {
 
 dependencies {
     api(libs.roborazzi)
-    implementation(libs.accompanist.testharness)
+    implementation(libs.androidx.compose.ui.test)
     implementation(libs.androidx.activity.compose)
     implementation(libs.androidx.compose.ui.test)
     implementation(libs.robolectric)
diff --git a/core/screenshot-testing/src/main/kotlin/com/google/samples/apps/nowinandroid/core/testing/util/ScreenshotHelper.kt b/core/screenshot-testing/src/main/kotlin/com/google/samples/apps/nowinandroid/core/testing/util/ScreenshotHelper.kt
index 468fff8dfb..f11651220e 100644
--- a/core/screenshot-testing/src/main/kotlin/com/google/samples/apps/nowinandroid/core/testing/util/ScreenshotHelper.kt
+++ b/core/screenshot-testing/src/main/kotlin/com/google/samples/apps/nowinandroid/core/testing/util/ScreenshotHelper.kt
@@ -25,6 +25,8 @@ import androidx.compose.runtime.key
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.platform.LocalInspectionMode
+import androidx.compose.ui.test.DarkMode
+import androidx.compose.ui.test.DeviceConfigurationOverride
 import androidx.compose.ui.test.junit4.AndroidComposeTestRule
 import androidx.compose.ui.test.onRoot
 import androidx.test.ext.junit.rules.ActivityScenarioRule
@@ -32,7 +34,6 @@ import com.github.takahirom.roborazzi.RoborazziOptions
 import com.github.takahirom.roborazzi.RoborazziOptions.CompareOptions
 import com.github.takahirom.roborazzi.RoborazziOptions.RecordOptions
 import com.github.takahirom.roborazzi.captureRoboImage
-import com.google.accompanist.testharness.TestHarness
 import com.google.samples.apps.nowinandroid.core.designsystem.theme.NiaTheme
 import org.robolectric.RuntimeEnvironment
 
@@ -75,7 +76,9 @@ fun <A : ComponentActivity> AndroidComposeTestRule<ActivityScenarioRule<A>, A>.c
         CompositionLocalProvider(
             LocalInspectionMode provides true,
         ) {
-            TestHarness(darkMode = darkMode) {
+            DeviceConfigurationOverride(
+                override = DeviceConfigurationOverride.Companion.DarkMode(darkMode),
+            ) {
                 body()
             }
         }
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 0aff27c8c4..7c354432c4 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -9,6 +9,7 @@ androidxAppCompat = "1.6.1"
 androidxBrowser = "1.8.0"
 androidxComposeBom = "2024.02.02"
 androidxComposeCompiler = "1.5.8"
+androidxComposeUiTest = "1.7.0-alpha06"
 androidxComposeMaterial3Adaptive = "1.0.0-alpha10"
 androidxComposeRuntimeTracing = "1.0.0-beta01"
 androidxCore = "1.12.0"
@@ -61,7 +62,6 @@ turbine = "1.0.0"
 
 [libraries]
 accompanist-permissions = { group = "com.google.accompanist", name = "accompanist-permissions", version.ref = "accompanist" }
-accompanist-testharness = { group = "com.google.accompanist", name = "accompanist-testharness", version.ref = "accompanist" }
 android-desugarJdkLibs = { group = "com.android.tools", name = "desugar_jdk_libs", version.ref = "androidDesugarJdkLibs" }
 androidx-activity-compose = { group = "androidx.activity", name = "activity-compose", version.ref = "androidxActivity" }
 androidx-appcompat = { group = "androidx.appcompat", name = "appcompat", version.ref = "androidxAppCompat" }
@@ -78,7 +78,7 @@ androidx-compose-material3-adaptive-navigation = { group = "androidx.compose.mat
 androidx-compose-material3-windowSizeClass = { group = "androidx.compose.material3", name = "material3-window-size-class" }
 androidx-compose-runtime = { group = "androidx.compose.runtime", name = "runtime" }
 androidx-compose-runtime-tracing = { group = "androidx.compose.runtime", name = "runtime-tracing", version.ref = "androidxComposeRuntimeTracing" }
-androidx-compose-ui-test = { group = "androidx.compose.ui", name = "ui-test-junit4" }
+androidx-compose-ui-test = { group = "androidx.compose.ui", name = "ui-test-junit4", version.ref = "androidxComposeUiTest" }
 androidx-compose-ui-testManifest = { group = "androidx.compose.ui", name = "ui-test-manifest" }
 androidx-compose-ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling" }
 androidx-compose-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }