diff --git a/.github/workflows/default.yml b/.github/workflows/default.yml
index 4d3e110..3116ed0 100644
--- a/.github/workflows/default.yml
+++ b/.github/workflows/default.yml
@@ -78,38 +78,3 @@ jobs:
       - run: cp lazythreetenbp/build/outputs/aar/lazythreetenbp-release.aar diffuse-source-file-release
         if: github.event_name != 'pull_request'
         shell: bash
-
-  ui-test:
-    runs-on: macos-latest
-    strategy:
-      matrix:
-        apiVersion: [ 23, 28, 30, 31, 34 ]
-      fail-fast: false
-
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
-      - uses: actions/setup-java@v4
-        with:
-          distribution: 'temurin'
-          java-version: 21
-
-      - uses: gradle/gradle-build-action@v2
-
-      - name: run tests
-        uses: reactivecircus/android-emulator-runner@v2
-        with:
-          api-level: ${{ matrix.apiVersion }}
-          profile: pixel_xl
-          target: google_apis
-          arch: x86_64
-          disable-spellchecker: true
-          script: ./gradlew connectedCheck
-
-      - name: Upload tests result
-        uses: actions/upload-artifact@v4
-        with:
-          name: "test-results [${{ matrix.apiVersion }}]"
-          path: "${{ github.workspace }}/**/reports/**"
diff --git a/build.gradle b/build.gradle
index ffa9178..fe4d4fd 100644
--- a/build.gradle
+++ b/build.gradle
@@ -14,8 +14,8 @@ commonConfig {
 allprojects {
     tasks.withType(KotlinCompile).configureEach {
         compilerOptions {
-            apiVersion = KotlinVersion.KOTLIN_1_5
-            languageVersion = KotlinVersion.KOTLIN_1_5
+            apiVersion = KotlinVersion.KOTLIN_1_6
+            languageVersion = KotlinVersion.KOTLIN_1_6
         }
     }
     pluginManager.withPlugin("kotlin") {
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 9e26573..177879e 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,14 +1,13 @@
 [versions]
-gradle-starter = "0.67.0"
+gradle-starter = "0.68.0"
 gradle-doctor = "0.9.1"
 google-annotation = "1.7.1"
-google-androidtest = "1.5.2"
-google-androidtestext = "1.1.5"
 maven-threetenbp = "1.6.8"
 maven-junit = "4.13.2"
 maven-truth = "1.2.0"
 maven-ticktock = "1.2.0-2021e"
 maven-binarycompatiblity = "0.13.2"
+maven-robolectric = "4.11.1"
 
 [libraries]
 starter-android = { module = "com.project.starter:android", version.ref = "gradle-starter" }
@@ -16,9 +15,8 @@ ticktock-compiler = { module = "dev.zacsweers.ticktock:ticktock-compiler", versi
 annotation-core = { module = "androidx.annotation:annotation", version.ref = "google-annotation" }
 threetenbp-core = { module = "org.threeten:threetenbp", version.ref = "maven-threetenbp" }
 junit-core = { module = "junit:junit", version.ref = "maven-junit" }
+robolectric-core = { module = "org.robolectric:robolectric", version.ref = "maven-robolectric" }
 truth-core = { module = "com.google.truth:truth", version.ref = "maven-truth" }
-androidtest-runner = { module = "androidx.test:runner", version.ref = "google-androidtest" }
-androidtest-junitext = { module = "androidx.test.ext:junit-ktx", version.ref = "google-androidtestext" }
 
 [plugins]
 starter-library-android = { id = "com.starter.library.android", version.ref = "gradle-starter" }
diff --git a/lazythreetenbp/build.gradle b/lazythreetenbp/build.gradle
index fcd4416..818d7ae 100755
--- a/lazythreetenbp/build.gradle
+++ b/lazythreetenbp/build.gradle
@@ -33,6 +33,11 @@ android {
         checkReleaseBuilds false
         disable += "UseTomlInstead"
     }
+    testOptions {
+        unitTests {
+            includeAndroidResources = true
+        }
+    }
 }
 
 androidComponents {
@@ -61,9 +66,7 @@ dependencies {
     // noinspection UseTomlInstead
     implementation("org.threeten:threetenbp:1.6.8:no-tzdb")
 
-    androidTestImplementation libs.annotation.core
-    androidTestImplementation libs.junit.core
-    androidTestImplementation libs.truth.core
-    androidTestImplementation libs.androidtest.runner
-    androidTestImplementation libs.androidtest.junitext
+    testImplementation libs.junit.core
+    testImplementation libs.robolectric.core
+    testImplementation libs.truth.core
 }
diff --git a/lazythreetenbp/src/androidTest/kotlin/com/usefulness/threetenbp/AndroidThreeTenTest.kt b/lazythreetenbp/src/test/kotlin/com/usefulness/threetenbp/AndroidThreeTenTest.kt
similarity index 79%
rename from lazythreetenbp/src/androidTest/kotlin/com/usefulness/threetenbp/AndroidThreeTenTest.kt
rename to lazythreetenbp/src/test/kotlin/com/usefulness/threetenbp/AndroidThreeTenTest.kt
index 44c59e8..4e55603 100644
--- a/lazythreetenbp/src/androidTest/kotlin/com/usefulness/threetenbp/AndroidThreeTenTest.kt
+++ b/lazythreetenbp/src/test/kotlin/com/usefulness/threetenbp/AndroidThreeTenTest.kt
@@ -1,13 +1,15 @@
 package com.usefulness.threetenbp
 
-import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.platform.app.InstrumentationRegistry
 import com.google.common.truth.Truth.assertThat
 import org.junit.Test
 import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
 import org.threeten.bp.zone.ZoneRulesProvider
 
-@RunWith(AndroidJUnit4::class)
+@Config(sdk = [23, 28, 30, 31, 34])
+@RunWith(RobolectricTestRunner::class)
 internal class AndroidThreeTenTest {
 
     private val context = InstrumentationRegistry.getInstrumentation().context