diff --git a/.github/workflows/pr-checks.yml b/.github/workflows/pr-checks.yml
new file mode 100644
index 000000000..84c454bcb
--- /dev/null
+++ b/.github/workflows/pr-checks.yml
@@ -0,0 +1,76 @@
+name: PR
+on: [ pull_request ]
+jobs:
+  detekt:
+    runs-on: ubuntu-latest
+    name: Detekt
+    steps:
+      - uses: actions/checkout@v1
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+      - name: detekt
+        run: |
+          ./gradlew clean detekt
+
+  assemble-debug-apk:
+    needs: [ detekt ]
+    name: Assemble Debug APK
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+      - name: Assemble Debug APK
+        run: bash ./gradlew sample:assembleDebug
+      - name: Upload app APK
+        uses: actions/upload-artifact@v1
+        with:
+          name: apk
+          path: sample/build/outputs/apk/debug/sample-debug.apk
+
+  assemble-debug-android-test-apk:
+    needs: [ detekt ]
+    name: Assemble Instrumental APK
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+      - name: Assemble Instrumental APK
+        run: bash ./gradlew sample:assembleDebugAndroidTest
+      - name: Upload app APK
+        uses: actions/upload-artifact@v1
+        with:
+          name: apk
+          path: sample/build/outputs/apk/androidTest/debug/sample-debug-androidTest.apk
+
+  firebase-lab-test:
+    needs: [ assemble-debug-apk, assemble-debug-android-test-apk ]
+    name: Firebase Instrumental API
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        api: [ 26, 27, 28, 29, 30, 31, 32, 33 ]
+    steps:
+      - uses: actions/checkout@v1
+      - name: Download APKs
+        uses: actions/download-artifact@v1
+        with:
+          name: apk
+      - name: Run tests on Firebase Test Lab for API ${{ matrix.api }}
+        uses: vacxe/firebase-test-lab-action@0.0.5
+        with:
+          app: apk/sample-debug.apk
+          test: apk/sample-debug-androidTest.apk
+          device-id: MediumPhone.arm
+          os-version-id: ${{ matrix.api }}
+          num-flaky-test-attempts: 4
+        env:
+          SERVICE_ACCOUNT: ${{ secrets.FIREBASE_TESTLAB_JSON }}
diff --git a/.github/workflows/pr-project-check.yml b/.github/workflows/pr-project-check.yml
deleted file mode 100644
index 643b20136..000000000
--- a/.github/workflows/pr-project-check.yml
+++ /dev/null
@@ -1,14 +0,0 @@
-name: pull_request-check
-on: [ pull_request ]
-jobs:
-  detekt:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v1
-      - name: Set up JDK 11
-        uses: actions/setup-java@v1
-        with:
-          java-version: 11
-      - name: detekt
-        run: |
-          ./gradlew clean detekt
diff --git a/.github/workflows/pr-sample-connected-checks.yml b/.github/workflows/pr-sample-connected-checks.yml
deleted file mode 100644
index a2548deab..000000000
--- a/.github/workflows/pr-sample-connected-checks.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-name: sample-connected-checks
-on: [ pull_request ]
-jobs:
-  integration-test:
-    runs-on: macOS-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        api: [ 24, 25, 26, 28, 29, 30, 31, 32, 33 ]
-        abi: [ x86_64 ]
-        include:
-          - api: 27
-            abi: x86
-    steps:
-      - uses: actions/checkout@v1
-      - name: Set up JDK 11
-        uses: actions/setup-java@v1
-        with:
-          java-version: 11
-      - uses: malinskiy/action-android/install-sdk@release/0.1.1
-      - name: connectedCheck
-        uses: malinskiy/action-android/emulator-run-cmd@release/0.1.1
-        timeout-minutes: 30
-        with:
-          cmd: ./gradlew connectedCheck
-          cmdOptions: -no-snapshot-save -noaudio -no-boot-anim -cores 2 -memory 3072 -no-window -gpu swiftshader_indirect
-          api: ${{ matrix.api }}
-          tag: google_apis
-          abi: ${{ matrix.abi }}
diff --git a/buildsystem/debug.keystore b/buildsystem/debug.keystore
new file mode 100644
index 000000000..fb8f71a13
Binary files /dev/null and b/buildsystem/debug.keystore differ
diff --git a/sample/build.gradle.kts b/sample/build.gradle.kts
index 8823cd849..77adeb16c 100644
--- a/sample/build.gradle.kts
+++ b/sample/build.gradle.kts
@@ -19,6 +19,19 @@ android {
         animationsDisabled = true
     }
 
+    signingConfigs {
+        create("kakao") {
+            storeFile = File("${project.rootDir}/buildsystem/debug.keystore")
+            storePassword = "android"
+            keyAlias = "kakaodebugkey"
+            keyPassword = "android"
+        }
+    }
+
+    buildTypes {
+        debug { signingConfig = signingConfigs.getByName("kakao") }
+    }
+
     sourceSets {
         getByName("main") {
             java.srcDir("src/main/kotlin")
diff --git a/sample/src/androidTest/kotlin/io/github/kakaocup/sample/TestActivityTest.kt b/sample/src/androidTest/kotlin/io/github/kakaocup/sample/TestActivityTest.kt
index abf46b3c4..916aa07aa 100644
--- a/sample/src/androidTest/kotlin/io/github/kakaocup/sample/TestActivityTest.kt
+++ b/sample/src/androidTest/kotlin/io/github/kakaocup/sample/TestActivityTest.kt
@@ -31,7 +31,6 @@ class TestActivityTest {
             }
 
             textViewLarge {
-                scrollTo()
                 click()
                 isVisible()
                 hasText("LARGE")
@@ -41,7 +40,6 @@ class TestActivityTest {
             }
 
             textViewSmall {
-                scrollTo()
                 isVisible()
                 hasText("small")
                 isCompletelyBelow {
@@ -50,13 +48,11 @@ class TestActivityTest {
             }
 
             textViewHint {
-                scrollTo()
                 isVisible()
                 hasHint("hint")
             }
 
             buttonViewLeft {
-                scrollTo()
                 isVisible()
                 hasText("left")
                 isCompletelyLeftOf {
@@ -65,7 +61,6 @@ class TestActivityTest {
             }
 
             buttonViewRight {
-                scrollTo()
                 isVisible()
                 hasText("right")
                 isCompletelyRightOf {
@@ -74,7 +69,6 @@ class TestActivityTest {
             }
 
             textViewSmall {
-                scrollTo()
                 isVisible()
                 hasText("small")
                 isCompletelyBelow {
@@ -83,46 +77,38 @@ class TestActivityTest {
             }
 
             textViewColored {
-                scrollTo()
                 hasTextColor(R.color.background_color)
             }
 
             map {
-                scrollTo()
                 click()
                 hasAnyTag("test_tag", "non_test_tag")
             }
 
             multiTypeRecycler {
-                scrollTo()
                 hasText("MULTI TYPE RECYCLER")
             }
 
             singleTypeRecycler {
-                scrollTo()
                 hasText("SINGLE TYPE RECYCLER")
             }
 
             autoComplete {
-                scrollTo()
                 hasText("AUTO_COMPLETE")
             }
 
             ratingbar {
-                scrollTo()
                 hasRating(0f)
                 setRatingAt(3f)
                 hasRating(3f)
             }
 
             snackbarButton {
-                scrollTo()
                 click()
             }
 
             snackbar {
                 isDisplayed()
-
                 text { hasText("This is snackbar!") }
                 action {
                     hasText("DISMISS")
@@ -134,14 +120,12 @@ class TestActivityTest {
             }
 
             seekbar {
-                scrollTo()
                 hasProgress(70)
                 dragProgressTo(30)
                 hasProgress(30)
             }
 
             switch {
-                scrollTo()
                 isChecked()
                 click()
                 isNotChecked()
@@ -156,7 +140,6 @@ class TestActivityTest {
             }
 
             switchCompat {
-                scrollTo()
                 isChecked()
                 click()
                 isNotChecked()
@@ -175,7 +158,6 @@ class TestActivityTest {
             }
 
             searchView {
-                scrollTo()
                 hasHint("This is the HINT!")
                 hasHint(R.string.hint)
                 typeQuery("Hello")
diff --git a/sample/src/main/res/layout/activity_alert_dialog.xml b/sample/src/main/res/layout/activity_alert_dialog.xml
index 2576032fa..297f12524 100644
--- a/sample/src/main/res/layout/activity_alert_dialog.xml
+++ b/sample/src/main/res/layout/activity_alert_dialog.xml
@@ -4,6 +4,11 @@
     android:layout_height="match_parent"
     android:orientation="vertical">
 
+  <!--Firebase API 29 emulator showing "Device is managed by your organization pop-up and overlapping buttons"-->
+  <View
+      android:layout_width="match_parent"
+      android:layout_height="100dp" />
+
   <Button
       android:id="@+id/show_alert_dialog"
       android:layout_width="match_parent"
diff --git a/sample/src/main/res/layout/activity_test.xml b/sample/src/main/res/layout/activity_test.xml
index 8cea7da69..e87b6d8bb 100644
--- a/sample/src/main/res/layout/activity_test.xml
+++ b/sample/src/main/res/layout/activity_test.xml
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/drawer_layout"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:fitsSystemWindows="true">
+                                           android:id="@+id/drawer_layout"
+                                           android:layout_width="match_parent"
+                                           android:layout_height="match_parent"
+                                           android:fitsSystemWindows="true">
 
   <ScrollView
       android:layout_width="match_parent"
@@ -19,145 +19,146 @@
           android:id="@+id/text_view_large"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
-          android:text="LARGE" />
+          android:text="LARGE"/>
 
       <TextView
           android:id="@+id/text_view_small"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
-          android:text="small" />
+          android:text="small"/>
 
       <TextView
           android:id="@+id/text_view_hint"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
-          android:hint="hint" />
+          android:hint="hint"/>
 
-      <LinearLayout
+      <GridLayout
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
-          android:orientation="horizontal">
+          android:columnCount="3">
 
         <Button
-            android:id="@+id/button_view_left"
+            android:id="@+id/single_type_recycler"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="left" />
+            android:text="SINGLE TYPE RECYCLER"/>
 
         <Button
-            android:id="@+id/button_view_right"
+            android:id="@+id/multi_type_recycler"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="right" />
-      </LinearLayout>
+            android:text="MULTI TYPE RECYCLER"/>
 
-      <TextView
-          android:id="@+id/text_view_colored"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:text="colored"
-          android:textColor="@color/background_color" />
+        <Button
+            android:id="@+id/auto_complete"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="AUTO_COMPLETE"/>
 
-      <ImageView
-          android:id="@+id/map"
-          android:layout_width="48dp"
-          android:layout_height="48dp" />
+        <Button
+            android:id="@+id/drawableList"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="DRAWABLE LIST"/>
 
-      <LinearLayout
-          android:layout_width="match_parent"
-          android:layout_height="wrap_content"
-          android:orientation="horizontal">
+        <Button
+            android:id="@+id/spinner_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="SPINNER"/>
 
         <Button
-            android:id="@+id/single_type_recycler"
+            android:id="@+id/web_button"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="SINGLE TYPE RECYCLER" />
+            android:text="WEB_BUTTON"/>
 
         <Button
-            android:id="@+id/multi_type_recycler"
+            android:id="@+id/view_pager_2"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="MULTI TYPE RECYCLER" />
-      </LinearLayout>
+            android:text="VIEW PAGER 2"/>
 
-      <Button
-          android:id="@+id/auto_complete"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:text="AUTO_COMPLETE" />
+        <Button
+            android:id="@+id/snackbar_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="SNACKBAR"/>
 
-      <Button
-          android:id="@+id/drawableList"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:text="DRAWABLE LIST" />
+        <Button
+            android:id="@+id/picker_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="PICKERS"/>
 
-      <Button
-          android:id="@+id/spinner_button"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:text="SPINNER" />
+        <Button
+            android:id="@+id/alert_dialog_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="ALERT DIALOG"/>
 
-      <Button
-          android:id="@+id/web_button"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:text="WEB_BUTTON" />
+        <Button
+            android:id="@+id/slider_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="SLIDER"/>
 
-      <Button
-          android:id="@+id/view_pager_2"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:text="VIEW PAGER 2" />
+        <Button
+            android:id="@+id/google_maps"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="GOOGLE MAPS"/>
 
-      <Button
-          android:id="@+id/snackbar_button"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:text="SNACKBAR" />
+        <Button
+            android:id="@+id/text_input_layout"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="TEXT INPUT LAYOUT"/>
 
-      <Button
-          android:id="@+id/picker_button"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:text="PICKERS" />
+        <Button
+            android:id="@+id/text_activity"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="TEXT VIEWS"/>
 
-      <Button
-          android:id="@+id/alert_dialog_button"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:text="ALERT DIALOG" />
+        <Button
+            android:id="@+id/switchers_button"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="SWITCHERS"/>
 
-      <Button
-          android:id="@+id/slider_button"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:text="SLIDER" />
+      </GridLayout>
 
-      <Button
-          android:id="@+id/google_maps"
-          android:layout_width="wrap_content"
+      <LinearLayout
+          android:layout_width="match_parent"
           android:layout_height="wrap_content"
-          android:text="GOOGLE MAPS" />
+          android:orientation="horizontal">
 
-      <Button
-          android:id="@+id/text_input_layout"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:text="TEXT INPUT LAYOUT" />
+        <Button
+            android:id="@+id/button_view_left"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="left"/>
 
-      <Button
-          android:id="@+id/text_activity"
-          android:layout_width="wrap_content"
-          android:layout_height="wrap_content"
-          android:text="TEXT VIEWS" />
+        <Button
+            android:id="@+id/button_view_right"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="right"/>
+      </LinearLayout>
 
-      <Button
-          android:id="@+id/switchers_button"
+      <TextView
+          android:id="@+id/text_view_colored"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
-          android:text="SWITCHERS" />
+          android:text="colored"
+          android:textColor="@color/background_color"/>
+
+      <ImageView
+          android:id="@+id/map"
+          android:layout_width="48dp"
+          android:layout_height="48dp"/>
 
       <RatingBar
           android:id="@+id/rating_bar"
@@ -165,7 +166,7 @@
           android:layout_height="wrap_content"
           android:numStars="5"
           android:rating="0"
-          android:stepSize="1" />
+          android:stepSize="1"/>
 
       <SeekBar
           android:id="@+id/seek_bar"
@@ -174,7 +175,7 @@
           android:max="100"
           android:paddingLeft="32dp"
           android:paddingRight="32dp"
-          android:progress="70" />
+          android:progress="70"/>
 
       <Switch
           android:id="@+id/switch_view"
@@ -183,7 +184,7 @@
           android:checked="true"
           android:paddingLeft="32dp"
           android:paddingRight="32dp"
-          android:text="Switch" />
+          android:text="Switch"/>
 
       <androidx.appcompat.widget.SwitchCompat
           android:id="@+id/switch_compat"
@@ -192,7 +193,7 @@
           android:checked="true"
           android:paddingLeft="32dp"
           android:paddingRight="32dp"
-          android:text="Switch compat" />
+          android:text="Switch compat"/>
 
       <androidx.core.widget.NestedScrollView
           android:layout_width="match_parent"
@@ -202,7 +203,7 @@
             android:id="@+id/nested_scroll_text_view"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
-            android:text="Text in a nested scroll view" />
+            android:text="Text in a nested scroll view"/>
 
       </androidx.core.widget.NestedScrollView>
 
@@ -210,7 +211,7 @@
           android:id="@+id/search_view"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"
-          android:hint="@string/hint" />
+          android:hint="@string/hint"/>
     </LinearLayout>
   </ScrollView>
 
@@ -225,7 +226,7 @@
     <TextView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="Slide Menu Item" />
+        android:text="Slide Menu Item"/>
 
   </LinearLayout>
 </androidx.drawerlayout.widget.DrawerLayout>