diff --git a/build.gradle b/build.gradle
index 411f8e647..ab631c0ef 100644
--- a/build.gradle
+++ b/build.gradle
@@ -30,7 +30,7 @@ android {
 
         applicationId 'com.android.inputmethod.latin'
         testApplicationId 'com.android.inputmethod.latin.tests'
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = false
 
         signingConfig signingConfigs.debug
diff --git a/tests/Android.bp b/tests/Android.bp
index 7a8359723..76681f669 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -26,7 +26,7 @@ android_test {
     ],
 
     static_libs: [
-        "android-support-test",
+        "androidx.test.rules",
         "mockito-target-minus-junit4",
     ],
     libs: [
diff --git a/tests/AndroidManifest.xml b/tests/AndroidManifest.xml
index 125aa1052..e788e0b7c 100644
--- a/tests/AndroidManifest.xml
+++ b/tests/AndroidManifest.xml
@@ -28,7 +28,7 @@
         <!-- meta-data android:name="com.android.contacts.iconset" android:resource="@xml/iconset" /-->
     </application>
 
-    <instrumentation android:name="android.support.test.runner.AndroidJUnitRunner"
+    <instrumentation android:name="androidx.test.runner.AndroidJUnitRunner"
         android:targetPackage="com.android.inputmethod.latin"
         android:label="LatinIME tests">
     </instrumentation>
diff --git a/tests/AndroidTest.xml b/tests/AndroidTest.xml
index d560cb96e..41334d5a8 100644
--- a/tests/AndroidTest.xml
+++ b/tests/AndroidTest.xml
@@ -34,7 +34,7 @@
     <option name="test-tag" value="LatinIMETests" />
     <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
         <option name="package" value="com.android.inputmethod.latin.tests" />
-        <option name="runner" value="android.support.test.runner.AndroidJUnitRunner" />
+        <option name="runner" value="androidx.test.runner.AndroidJUnitRunner" />
         <option name="hidden-api-checks" value="false"/>
     </test>
 </configuration>
diff --git a/tests/src/com/android/inputmethod/compat/LocaleSpanCompatUtilsTests.java b/tests/src/com/android/inputmethod/compat/LocaleSpanCompatUtilsTests.java
index 05c15ec21..6203238b8 100644
--- a/tests/src/com/android/inputmethod/compat/LocaleSpanCompatUtilsTests.java
+++ b/tests/src/com/android/inputmethod/compat/LocaleSpanCompatUtilsTests.java
@@ -22,19 +22,18 @@ import static org.junit.Assert.assertTrue;
 
 import android.graphics.Typeface;
 import android.os.Build;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.text.SpannableString;
 import android.text.Spanned;
 import android.text.style.StyleSpan;
 
-import java.util.Locale;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
-import org.junit.After;
-import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Locale;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class LocaleSpanCompatUtilsTests {
diff --git a/tests/src/com/android/inputmethod/compat/SuggestionSpanUtilsTest.java b/tests/src/com/android/inputmethod/compat/SuggestionSpanUtilsTest.java
index 820648d23..a0544d62a 100644
--- a/tests/src/com/android/inputmethod/compat/SuggestionSpanUtilsTest.java
+++ b/tests/src/com/android/inputmethod/compat/SuggestionSpanUtilsTest.java
@@ -22,25 +22,26 @@ import static org.junit.Assert.assertTrue;
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.os.Build;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.text.Spanned;
 import android.text.TextUtils;
 import android.text.style.SuggestionSpan;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.inputmethod.latin.SuggestedWords;
 import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
 
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Locale;
 
 import javax.annotation.Nullable;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class SuggestionSpanUtilsTest {
diff --git a/tests/src/com/android/inputmethod/compat/TextInfoCompatUtilsTests.java b/tests/src/com/android/inputmethod/compat/TextInfoCompatUtilsTests.java
index ec7c2ab6e..d4dbfd4c6 100644
--- a/tests/src/com/android/inputmethod/compat/TextInfoCompatUtilsTests.java
+++ b/tests/src/com/android/inputmethod/compat/TextInfoCompatUtilsTests.java
@@ -20,8 +20,6 @@ import static org.junit.Assert.assertTrue;
 
 import android.graphics.Typeface;
 import android.os.Parcel;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.text.SpannableString;
 import android.text.Spanned;
 import android.text.TextUtils;
@@ -29,12 +27,14 @@ import android.text.style.StyleSpan;
 import android.text.style.URLSpan;
 import android.view.textservice.TextInfo;
 
-import java.util.Arrays;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
-import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Arrays;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class TextInfoCompatUtilsTests {
diff --git a/tests/src/com/android/inputmethod/keyboard/KeyboardLayoutTest.java b/tests/src/com/android/inputmethod/keyboard/KeyboardLayoutTest.java
index d620a777b..ddace1a38 100644
--- a/tests/src/com/android/inputmethod/keyboard/KeyboardLayoutTest.java
+++ b/tests/src/com/android/inputmethod/keyboard/KeyboardLayoutTest.java
@@ -18,14 +18,14 @@ package com.android.inputmethod.keyboard;
 
 import static org.junit.Assert.assertEquals;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-
-import java.util.ArrayList;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.ArrayList;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class KeyboardLayoutTest {
diff --git a/tests/src/com/android/inputmethod/keyboard/KeyboardThemeTests.java b/tests/src/com/android/inputmethod/keyboard/KeyboardThemeTests.java
index 594277356..2f8140e23 100644
--- a/tests/src/com/android/inputmethod/keyboard/KeyboardThemeTests.java
+++ b/tests/src/com/android/inputmethod/keyboard/KeyboardThemeTests.java
@@ -16,31 +16,32 @@
 
 package com.android.inputmethod.keyboard;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertTrue;
-
 import static com.android.inputmethod.keyboard.KeyboardTheme.THEME_ID_ICS;
 import static com.android.inputmethod.keyboard.KeyboardTheme.THEME_ID_KLP;
 import static com.android.inputmethod.keyboard.KeyboardTheme.THEME_ID_LXX_DARK;
 import static com.android.inputmethod.keyboard.KeyboardTheme.THEME_ID_LXX_LIGHT;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.Build;
 import android.os.Build.VERSION_CODES;
 import android.preference.PreferenceManager;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 
-import java.util.Arrays;
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Arrays;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class KeyboardThemeTests {
diff --git a/tests/src/com/android/inputmethod/keyboard/MoreKeysKeyboardBuilderAutoOrderTests.java b/tests/src/com/android/inputmethod/keyboard/MoreKeysKeyboardBuilderAutoOrderTests.java
index 2c15a0291..90963d4ca 100644
--- a/tests/src/com/android/inputmethod/keyboard/MoreKeysKeyboardBuilderAutoOrderTests.java
+++ b/tests/src/com/android/inputmethod/keyboard/MoreKeysKeyboardBuilderAutoOrderTests.java
@@ -20,8 +20,8 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.fail;
 
-import android.support.test.filters.MediumTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.MediumTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.keyboard.MoreKeysKeyboard.MoreKeysKeyboardParams;
 
diff --git a/tests/src/com/android/inputmethod/keyboard/MoreKeysKeyboardBuilderFixedOrderTests.java b/tests/src/com/android/inputmethod/keyboard/MoreKeysKeyboardBuilderFixedOrderTests.java
index 2a30448dc..3c5c298f6 100644
--- a/tests/src/com/android/inputmethod/keyboard/MoreKeysKeyboardBuilderFixedOrderTests.java
+++ b/tests/src/com/android/inputmethod/keyboard/MoreKeysKeyboardBuilderFixedOrderTests.java
@@ -20,8 +20,8 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.fail;
 
-import android.support.test.filters.MediumTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.MediumTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.keyboard.MoreKeysKeyboard.MoreKeysKeyboardParams;
 
diff --git a/tests/src/com/android/inputmethod/keyboard/MoreKeysKeyboardBuilderMaxOrderTests.java b/tests/src/com/android/inputmethod/keyboard/MoreKeysKeyboardBuilderMaxOrderTests.java
index 0a2076dde..1d28c2295 100644
--- a/tests/src/com/android/inputmethod/keyboard/MoreKeysKeyboardBuilderMaxOrderTests.java
+++ b/tests/src/com/android/inputmethod/keyboard/MoreKeysKeyboardBuilderMaxOrderTests.java
@@ -20,8 +20,8 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.fail;
 
-import android.support.test.filters.MediumTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.MediumTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.keyboard.MoreKeysKeyboard.MoreKeysKeyboardParams;
 
diff --git a/tests/src/com/android/inputmethod/keyboard/internal/HermiteInterpolatorTests.java b/tests/src/com/android/inputmethod/keyboard/internal/HermiteInterpolatorTests.java
index 814ecd485..a1ee199c0 100644
--- a/tests/src/com/android/inputmethod/keyboard/internal/HermiteInterpolatorTests.java
+++ b/tests/src/com/android/inputmethod/keyboard/internal/HermiteInterpolatorTests.java
@@ -18,8 +18,8 @@ package com.android.inputmethod.keyboard.internal;
 
 import static org.junit.Assert.assertEquals;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/src/com/android/inputmethod/keyboard/internal/KeyboardTextsSetTests.java b/tests/src/com/android/inputmethod/keyboard/internal/KeyboardTextsSetTests.java
index 99211922e..f312cadae 100644
--- a/tests/src/com/android/inputmethod/keyboard/internal/KeyboardTextsSetTests.java
+++ b/tests/src/com/android/inputmethod/keyboard/internal/KeyboardTextsSetTests.java
@@ -20,24 +20,25 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 
 import android.content.Context;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.inputmethod.InputMethodInfo;
 import android.view.inputmethod.InputMethodSubtype;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.inputmethod.latin.RichInputMethodManager;
 import com.android.inputmethod.latin.utils.SubtypeLocaleUtils;
 
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.Locale;
 
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public final class KeyboardTextsSetTests {
diff --git a/tests/src/com/android/inputmethod/keyboard/internal/MatrixUtilsTests.java b/tests/src/com/android/inputmethod/keyboard/internal/MatrixUtilsTests.java
index ba45a1b5a..10c552f29 100644
--- a/tests/src/com/android/inputmethod/keyboard/internal/MatrixUtilsTests.java
+++ b/tests/src/com/android/inputmethod/keyboard/internal/MatrixUtilsTests.java
@@ -19,15 +19,14 @@ package com.android.inputmethod.keyboard.internal;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
-import com.android.inputmethod.keyboard.internal.MatrixUtils.MatrixOperationFailedException;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import com.android.inputmethod.keyboard.internal.MatrixUtils.MatrixOperationFailedException;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
-
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class MatrixUtilsTests {
diff --git a/tests/src/com/android/inputmethod/keyboard/internal/MoreKeySpecSplitTests.java b/tests/src/com/android/inputmethod/keyboard/internal/MoreKeySpecSplitTests.java
index 4cab29a1c..cbedd0426 100644
--- a/tests/src/com/android/inputmethod/keyboard/internal/MoreKeySpecSplitTests.java
+++ b/tests/src/com/android/inputmethod/keyboard/internal/MoreKeySpecSplitTests.java
@@ -21,19 +21,20 @@ import static org.junit.Assert.fail;
 
 import android.content.Context;
 import android.content.res.Resources;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.latin.R;
 
-import java.util.Arrays;
-import java.util.Locale;
-
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Arrays;
+import java.util.Locale;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class MoreKeySpecSplitTests {
diff --git a/tests/src/com/android/inputmethod/keyboard/internal/MoreKeySpecStringReferenceTests.java b/tests/src/com/android/inputmethod/keyboard/internal/MoreKeySpecStringReferenceTests.java
index 0ffc96a34..3655abbd5 100644
--- a/tests/src/com/android/inputmethod/keyboard/internal/MoreKeySpecStringReferenceTests.java
+++ b/tests/src/com/android/inputmethod/keyboard/internal/MoreKeySpecStringReferenceTests.java
@@ -22,18 +22,19 @@ import static org.junit.Assert.fail;
 import android.app.Instrumentation;
 import android.content.Context;
 import android.content.res.Resources;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.latin.tests.R;
 
-import java.util.Locale;
-
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Locale;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class MoreKeySpecStringReferenceTests {
diff --git a/tests/src/com/android/inputmethod/keyboard/internal/PointerTrackerQueueTests.java b/tests/src/com/android/inputmethod/keyboard/internal/PointerTrackerQueueTests.java
index f4885fff2..6ab1549c0 100644
--- a/tests/src/com/android/inputmethod/keyboard/internal/PointerTrackerQueueTests.java
+++ b/tests/src/com/android/inputmethod/keyboard/internal/PointerTrackerQueueTests.java
@@ -20,8 +20,8 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/src/com/android/inputmethod/keyboard/internal/SmoothingUtilsTests.java b/tests/src/com/android/inputmethod/keyboard/internal/SmoothingUtilsTests.java
index 6bf98d490..39da3ec71 100644
--- a/tests/src/com/android/inputmethod/keyboard/internal/SmoothingUtilsTests.java
+++ b/tests/src/com/android/inputmethod/keyboard/internal/SmoothingUtilsTests.java
@@ -19,10 +19,10 @@ package com.android.inputmethod.keyboard.internal;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
-import com.android.inputmethod.keyboard.internal.MatrixUtils.MatrixOperationFailedException;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import com.android.inputmethod.keyboard.internal.MatrixUtils.MatrixOperationFailedException;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/src/com/android/inputmethod/latin/BinaryDictionaryTests.java b/tests/src/com/android/inputmethod/latin/BinaryDictionaryTests.java
index 29542730c..db8b80949 100644
--- a/tests/src/com/android/inputmethod/latin/BinaryDictionaryTests.java
+++ b/tests/src/com/android/inputmethod/latin/BinaryDictionaryTests.java
@@ -21,12 +21,13 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.LargeTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.text.TextUtils;
 import android.util.Pair;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.LargeTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.inputmethod.latin.NgramContext.WordInfo;
 import com.android.inputmethod.latin.common.CodePointUtils;
 import com.android.inputmethod.latin.common.FileUtils;
@@ -36,6 +37,11 @@ import com.android.inputmethod.latin.makedict.WeightedString;
 import com.android.inputmethod.latin.makedict.WordProperty;
 import com.android.inputmethod.latin.utils.BinaryDictionaryUtils;
 
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
@@ -44,11 +50,6 @@ import java.util.HashSet;
 import java.util.Locale;
 import java.util.Random;
 
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 @LargeTest
 @RunWith(AndroidJUnit4.class)
 public class BinaryDictionaryTests {
diff --git a/tests/src/com/android/inputmethod/latin/ContactsContentObserverTest.java b/tests/src/com/android/inputmethod/latin/ContactsContentObserverTest.java
index be039c481..029e1b506 100644
--- a/tests/src/com/android/inputmethod/latin/ContactsContentObserverTest.java
+++ b/tests/src/com/android/inputmethod/latin/ContactsContentObserverTest.java
@@ -24,8 +24,9 @@ import static org.mockito.Mockito.when;
 
 import android.content.Context;
 import android.provider.ContactsContract.Contacts;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.After;
 import org.junit.Before;
diff --git a/tests/src/com/android/inputmethod/latin/ContactsDictionaryUtilsTest.java b/tests/src/com/android/inputmethod/latin/ContactsDictionaryUtilsTest.java
index 57d5def15..a00c9dfdd 100644
--- a/tests/src/com/android/inputmethod/latin/ContactsDictionaryUtilsTest.java
+++ b/tests/src/com/android/inputmethod/latin/ContactsDictionaryUtilsTest.java
@@ -20,8 +20,8 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/src/com/android/inputmethod/latin/ContactsManagerTest.java b/tests/src/com/android/inputmethod/latin/ContactsManagerTest.java
index 1cc289a27..d3d746df5 100644
--- a/tests/src/com/android/inputmethod/latin/ContactsManagerTest.java
+++ b/tests/src/com/android/inputmethod/latin/ContactsManagerTest.java
@@ -27,24 +27,25 @@ import android.database.MatrixCursor;
 import android.net.Uri;
 import android.provider.ContactsContract;
 import android.provider.ContactsContract.Contacts;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.test.RenamingDelegatingContext;
 import android.test.mock.MockContentProvider;
 import android.test.mock.MockContentResolver;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.inputmethod.latin.ContactsDictionaryConstants;
 import com.android.inputmethod.latin.ContactsManager;
 
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.concurrent.TimeUnit;
-
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.concurrent.TimeUnit;
+
 /**
  * Tests for {@link ContactsManager}
  */
diff --git a/tests/src/com/android/inputmethod/latin/DictionaryFacilitatorLruCacheTests.java b/tests/src/com/android/inputmethod/latin/DictionaryFacilitatorLruCacheTests.java
index cdb5b8e72..f8130f33c 100644
--- a/tests/src/com/android/inputmethod/latin/DictionaryFacilitatorLruCacheTests.java
+++ b/tests/src/com/android/inputmethod/latin/DictionaryFacilitatorLruCacheTests.java
@@ -19,15 +19,15 @@ package com.android.inputmethod.latin;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
-import java.util.Locale;
-
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.LargeTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.LargeTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Locale;
+
 @LargeTest
 @RunWith(AndroidJUnit4.class)
 public class DictionaryFacilitatorLruCacheTests {
diff --git a/tests/src/com/android/inputmethod/latin/NgramContextTests.java b/tests/src/com/android/inputmethod/latin/NgramContextTests.java
index 6fa8a5a47..505818439 100644
--- a/tests/src/com/android/inputmethod/latin/NgramContextTests.java
+++ b/tests/src/com/android/inputmethod/latin/NgramContextTests.java
@@ -20,14 +20,14 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.inputmethod.latin.NgramContext.WordInfo;
 import com.android.inputmethod.latin.settings.SpacingAndPunctuations;
 import com.android.inputmethod.latin.utils.NgramContextUtils;
 
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
diff --git a/tests/src/com/android/inputmethod/latin/RichInputConnectionAndTextRangeTests.java b/tests/src/com/android/inputmethod/latin/RichInputConnectionAndTextRangeTests.java
index 51a217b4d..ac38468f9 100644
--- a/tests/src/com/android/inputmethod/latin/RichInputConnectionAndTextRangeTests.java
+++ b/tests/src/com/android/inputmethod/latin/RichInputConnectionAndTextRangeTests.java
@@ -23,9 +23,6 @@ import static org.junit.Assert.assertTrue;
 import android.content.res.Resources;
 import android.inputmethodservice.InputMethodService;
 import android.os.Parcel;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.text.SpannableString;
 import android.text.TextUtils;
 import android.text.style.SuggestionSpan;
@@ -34,6 +31,10 @@ import android.view.inputmethod.ExtractedTextRequest;
 import android.view.inputmethod.InputConnection;
 import android.view.inputmethod.InputConnectionWrapper;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.inputmethod.latin.common.Constants;
 import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.settings.SpacingAndPunctuations;
@@ -42,12 +43,12 @@ import com.android.inputmethod.latin.utils.RunInLocale;
 import com.android.inputmethod.latin.utils.ScriptUtils;
 import com.android.inputmethod.latin.utils.TextRange;
 
-import java.util.Locale;
-
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Locale;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class RichInputConnectionAndTextRangeTests {
diff --git a/tests/src/com/android/inputmethod/latin/RichInputMethodSubtypeTests.java b/tests/src/com/android/inputmethod/latin/RichInputMethodSubtypeTests.java
index 2b787ea32..578e6bea0 100644
--- a/tests/src/com/android/inputmethod/latin/RichInputMethodSubtypeTests.java
+++ b/tests/src/com/android/inputmethod/latin/RichInputMethodSubtypeTests.java
@@ -25,9 +25,10 @@ import android.content.Context;
 import android.content.res.Resources;
 import android.view.inputmethod.InputMethodInfo;
 import android.view.inputmethod.InputMethodSubtype;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.RichInputMethodManager;
@@ -36,14 +37,14 @@ import com.android.inputmethod.latin.utils.AdditionalSubtypeUtils;
 import com.android.inputmethod.latin.utils.RunInLocale;
 import com.android.inputmethod.latin.utils.SubtypeLocaleUtils;
 
-import java.util.ArrayList;
-import java.util.Locale;
-
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.ArrayList;
+import java.util.Locale;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class RichInputMethodSubtypeTests {
diff --git a/tests/src/com/android/inputmethod/latin/SuggestedWordsTests.java b/tests/src/com/android/inputmethod/latin/SuggestedWordsTests.java
index 967b17f09..92bff0e2e 100644
--- a/tests/src/com/android/inputmethod/latin/SuggestedWordsTests.java
+++ b/tests/src/com/android/inputmethod/latin/SuggestedWordsTests.java
@@ -20,8 +20,8 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
 
diff --git a/tests/src/com/android/inputmethod/latin/WordComposerTests.java b/tests/src/com/android/inputmethod/latin/WordComposerTests.java
index 25e57eee6..4ac094b25 100644
--- a/tests/src/com/android/inputmethod/latin/WordComposerTests.java
+++ b/tests/src/com/android/inputmethod/latin/WordComposerTests.java
@@ -20,14 +20,13 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.latin.common.Constants;
 import com.android.inputmethod.latin.common.CoordinateUtils;
 import com.android.inputmethod.latin.common.StringUtils;
 
-import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
diff --git a/tests/src/com/android/inputmethod/latin/accounts/AccountsChangedReceiverTests.java b/tests/src/com/android/inputmethod/latin/accounts/AccountsChangedReceiverTests.java
index aa2a5c2cf..86f453b08 100644
--- a/tests/src/com/android/inputmethod/latin/accounts/AccountsChangedReceiverTests.java
+++ b/tests/src/com/android/inputmethod/latin/accounts/AccountsChangedReceiverTests.java
@@ -23,9 +23,10 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.preference.PreferenceManager;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.latin.settings.LocalSettingsConstants;
 
diff --git a/tests/src/com/android/inputmethod/latin/common/InputPointersTests.java b/tests/src/com/android/inputmethod/latin/common/InputPointersTests.java
index 9ead0ae25..29abec365 100644
--- a/tests/src/com/android/inputmethod/latin/common/InputPointersTests.java
+++ b/tests/src/com/android/inputmethod/latin/common/InputPointersTests.java
@@ -23,8 +23,8 @@ import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/src/com/android/inputmethod/latin/common/ResizableIntArrayTests.java b/tests/src/com/android/inputmethod/latin/common/ResizableIntArrayTests.java
index d9b6bad75..5151b6b2b 100644
--- a/tests/src/com/android/inputmethod/latin/common/ResizableIntArrayTests.java
+++ b/tests/src/com/android/inputmethod/latin/common/ResizableIntArrayTests.java
@@ -23,14 +23,14 @@ import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-
-import java.util.Arrays;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Arrays;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class ResizableIntArrayTests {
diff --git a/tests/src/com/android/inputmethod/latin/common/StringUtilsTests.java b/tests/src/com/android/inputmethod/latin/common/StringUtilsTests.java
index 393efe6eb..36a4b912d 100644
--- a/tests/src/com/android/inputmethod/latin/common/StringUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/common/StringUtilsTests.java
@@ -20,14 +20,14 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-
-import java.util.Locale;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Locale;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class StringUtilsTests {
diff --git a/tests/src/com/android/inputmethod/latin/common/UnicodeSurrogateTests.java b/tests/src/com/android/inputmethod/latin/common/UnicodeSurrogateTests.java
index 43fdeec96..adfbbf418 100644
--- a/tests/src/com/android/inputmethod/latin/common/UnicodeSurrogateTests.java
+++ b/tests/src/com/android/inputmethod/latin/common/UnicodeSurrogateTests.java
@@ -19,10 +19,9 @@ package com.android.inputmethod.latin.common;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
-import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
diff --git a/tests/src/com/android/inputmethod/latin/network/BlockingHttpClientTests.java b/tests/src/com/android/inputmethod/latin/network/BlockingHttpClientTests.java
index bdbbaf2e6..f6f54eb77 100644
--- a/tests/src/com/android/inputmethod/latin/network/BlockingHttpClientTests.java
+++ b/tests/src/com/android/inputmethod/latin/network/BlockingHttpClientTests.java
@@ -24,11 +24,14 @@ import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.latin.network.BlockingHttpClient.ResponseProcessor;
 
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.Mockito;
 import org.mockito.MockitoAnnotations;
@@ -43,10 +46,6 @@ import java.net.HttpURLConnection;
 import java.util.Arrays;
 import java.util.Random;
 
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 /**
  * Tests for {@link BlockingHttpClient}.
  */
diff --git a/tests/src/com/android/inputmethod/latin/network/HttpUrlConnectionBuilderTests.java b/tests/src/com/android/inputmethod/latin/network/HttpUrlConnectionBuilderTests.java
index fce812ea7..1aa4040b8 100644
--- a/tests/src/com/android/inputmethod/latin/network/HttpUrlConnectionBuilderTests.java
+++ b/tests/src/com/android/inputmethod/latin/network/HttpUrlConnectionBuilderTests.java
@@ -25,16 +25,16 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 import java.io.IOException;
 import java.net.HttpURLConnection;
 import java.net.MalformedURLException;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 /**
  * Tests for {@link HttpUrlConnectionBuilder}.
  */
diff --git a/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTests.java b/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTests.java
index 8f786d57b..68f041589 100644
--- a/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTests.java
+++ b/tests/src/com/android/inputmethod/latin/personalization/UserHistoryDictionaryTests.java
@@ -19,23 +19,24 @@ package com.android.inputmethod.latin.personalization;
 import static org.junit.Assert.assertTrue;
 
 import android.content.Context;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.LargeTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.util.Log;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.LargeTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.inputmethod.latin.ExpandableBinaryDictionary;
 import com.android.inputmethod.latin.utils.BinaryDictionaryUtils;
 
-import java.io.File;
-import java.util.Locale;
-import java.util.Random;
-
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.io.File;
+import java.util.Locale;
+import java.util.Random;
+
 /**
  * Unit tests for UserHistoryDictionary
  */
diff --git a/tests/src/com/android/inputmethod/latin/settings/AccountsSettingsFragmentTests.java b/tests/src/com/android/inputmethod/latin/settings/AccountsSettingsFragmentTests.java
index 49a9a25da..667ffd1ae 100644
--- a/tests/src/com/android/inputmethod/latin/settings/AccountsSettingsFragmentTests.java
+++ b/tests/src/com/android/inputmethod/latin/settings/AccountsSettingsFragmentTests.java
@@ -26,12 +26,13 @@ import android.app.AlertDialog;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.MediumTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.View;
 import android.widget.ListView;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.MediumTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.inputmethod.latin.utils.ManagedProfileUtils;
 
 import org.junit.After;
diff --git a/tests/src/com/android/inputmethod/latin/settings/SpacingAndPunctuationsTests.java b/tests/src/com/android/inputmethod/latin/settings/SpacingAndPunctuationsTests.java
index 52ed2ae10..df44fba67 100644
--- a/tests/src/com/android/inputmethod/latin/settings/SpacingAndPunctuationsTests.java
+++ b/tests/src/com/android/inputmethod/latin/settings/SpacingAndPunctuationsTests.java
@@ -23,9 +23,10 @@ import static org.junit.Assert.fail;
 
 import android.content.Context;
 import android.content.res.Resources;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.latin.SuggestedWords;
 import com.android.inputmethod.latin.common.Constants;
@@ -33,12 +34,12 @@ import com.android.inputmethod.latin.utils.RunInLocale;
 
 import junit.framework.AssertionFailedError;
 
-import java.util.Locale;
-
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Locale;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class SpacingAndPunctuationsTests {
diff --git a/tests/src/com/android/inputmethod/latin/suggestions/SuggestionStripLayoutHelperTests.java b/tests/src/com/android/inputmethod/latin/suggestions/SuggestionStripLayoutHelperTests.java
index b44a9290b..3706574ef 100644
--- a/tests/src/com/android/inputmethod/latin/suggestions/SuggestionStripLayoutHelperTests.java
+++ b/tests/src/com/android/inputmethod/latin/suggestions/SuggestionStripLayoutHelperTests.java
@@ -21,8 +21,8 @@ import static junit.framework.TestCase.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.latin.SuggestedWords;
 
diff --git a/tests/src/com/android/inputmethod/latin/touchinputconsumer/NullGestureConsumerTests.java b/tests/src/com/android/inputmethod/latin/touchinputconsumer/NullGestureConsumerTests.java
index d508f3667..986c8e3dd 100644
--- a/tests/src/com/android/inputmethod/latin/touchinputconsumer/NullGestureConsumerTests.java
+++ b/tests/src/com/android/inputmethod/latin/touchinputconsumer/NullGestureConsumerTests.java
@@ -19,8 +19,8 @@ package com.android.inputmethod.latin.touchinputconsumer;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertSame;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/src/com/android/inputmethod/latin/utils/AdditionalSubtypeUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/AdditionalSubtypeUtilsTests.java
index ba3951ffa..08c404e12 100644
--- a/tests/src/com/android/inputmethod/latin/utils/AdditionalSubtypeUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/AdditionalSubtypeUtilsTests.java
@@ -16,31 +16,33 @@
 
 package com.android.inputmethod.latin.utils;
 
-import static com.android.inputmethod.latin.common.Constants.Subtype.KEYBOARD_MODE;
 import static com.android.inputmethod.latin.common.Constants.Subtype.ExtraValue.ASCII_CAPABLE;
 import static com.android.inputmethod.latin.common.Constants.Subtype.ExtraValue.EMOJI_CAPABLE;
 import static com.android.inputmethod.latin.common.Constants.Subtype.ExtraValue.IS_ADDITIONAL_SUBTYPE;
 import static com.android.inputmethod.latin.common.Constants.Subtype.ExtraValue.KEYBOARD_LAYOUT_SET;
 import static com.android.inputmethod.latin.common.Constants.Subtype.ExtraValue.UNTRANSLATABLE_STRING_IN_SUBTYPE_NAME;
+import static com.android.inputmethod.latin.common.Constants.Subtype.KEYBOARD_MODE;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
 import android.content.Context;
 import android.os.Build;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.inputmethod.InputMethodSubtype;
 
-import com.android.inputmethod.compat.InputMethodSubtypeCompatUtils;
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
-import java.util.Locale;
+import com.android.inputmethod.compat.InputMethodSubtypeCompatUtils;
 
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Locale;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class AdditionalSubtypeUtilsTests {
diff --git a/tests/src/com/android/inputmethod/latin/utils/AsyncResultHolderTests.java b/tests/src/com/android/inputmethod/latin/utils/AsyncResultHolderTests.java
index f30f6661b..f53780543 100644
--- a/tests/src/com/android/inputmethod/latin/utils/AsyncResultHolderTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/AsyncResultHolderTests.java
@@ -18,10 +18,11 @@ package com.android.inputmethod.latin.utils;
 
 import static org.junit.Assert.assertEquals;
 
-import android.support.test.filters.MediumTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.util.Log;
 
+import androidx.test.filters.MediumTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
diff --git a/tests/src/com/android/inputmethod/latin/utils/CapsModeUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/CapsModeUtilsTests.java
index 3a452e4ba..4aac7fc41 100644
--- a/tests/src/com/android/inputmethod/latin/utils/CapsModeUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/CapsModeUtilsTests.java
@@ -20,11 +20,12 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
 import android.content.res.Resources;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.text.TextUtils;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.inputmethod.latin.common.LocaleUtils;
 import com.android.inputmethod.latin.settings.SpacingAndPunctuations;
 
diff --git a/tests/src/com/android/inputmethod/latin/utils/CollectionUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/CollectionUtilsTests.java
index 96dfa36c2..da23c9cb8 100644
--- a/tests/src/com/android/inputmethod/latin/utils/CollectionUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/CollectionUtilsTests.java
@@ -21,10 +21,13 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.inputmethod.latin.common.CollectionUtils;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -33,9 +36,6 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 /**
  * Tests for {@link CollectionUtils}.
  */
diff --git a/tests/src/com/android/inputmethod/latin/utils/DictionaryInfoUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/DictionaryInfoUtilsTests.java
index e24707aa6..2112f985a 100644
--- a/tests/src/com/android/inputmethod/latin/utils/DictionaryInfoUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/DictionaryInfoUtilsTests.java
@@ -21,18 +21,19 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
 import android.content.res.Resources;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.latin.common.LocaleUtils;
 import com.android.inputmethod.latin.settings.SpacingAndPunctuations;
 
-import java.util.Locale;
-
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Locale;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class DictionaryInfoUtilsTests {
diff --git a/tests/src/com/android/inputmethod/latin/utils/ExecutorUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/ExecutorUtilsTests.java
index 6118ad812..7c9b3e6ca 100644
--- a/tests/src/com/android/inputmethod/latin/utils/ExecutorUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/ExecutorUtilsTests.java
@@ -18,17 +18,18 @@ package com.android.inputmethod.latin.utils;
 
 import static org.junit.Assert.assertEquals;
 
-import android.support.test.filters.MediumTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.util.Log;
 
+import androidx.test.filters.MediumTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 /**
  * Unit tests for {@link ExecutorUtils}.
  */
diff --git a/tests/src/com/android/inputmethod/latin/utils/ImportantNoticeUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/ImportantNoticeUtilsTests.java
index 8c004bf8a..9d9a541b7 100644
--- a/tests/src/com/android/inputmethod/latin/utils/ImportantNoticeUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/ImportantNoticeUtilsTests.java
@@ -17,14 +17,16 @@
 package com.android.inputmethod.latin.utils;
 
 import static com.android.inputmethod.latin.utils.ImportantNoticeUtils.KEY_TIMESTAMP_OF_CONTACTS_NOTICE;
+
 import static org.junit.Assert.assertEquals;
 import static org.mockito.Mockito.when;
 
 import android.content.Context;
 import android.content.SharedPreferences;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.MediumTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.MediumTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.latin.settings.SettingsValues;
 
diff --git a/tests/src/com/android/inputmethod/latin/utils/JsonUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/JsonUtilsTests.java
index a9e40a7a4..fd5e0a4d7 100644
--- a/tests/src/com/android/inputmethod/latin/utils/JsonUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/JsonUtilsTests.java
@@ -18,15 +18,15 @@ package com.android.inputmethod.latin.utils;
 
 import static org.junit.Assert.assertEquals;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-
-import java.util.Arrays;
-import java.util.List;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Arrays;
+import java.util.List;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class JsonUtilsTests {
diff --git a/tests/src/com/android/inputmethod/latin/utils/LanguageOnSpacebarUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/LanguageOnSpacebarUtilsTests.java
index 972b78345..58e26e8d6 100644
--- a/tests/src/com/android/inputmethod/latin/utils/LanguageOnSpacebarUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/LanguageOnSpacebarUtilsTests.java
@@ -19,29 +19,31 @@ package com.android.inputmethod.latin.utils;
 import static com.android.inputmethod.latin.utils.LanguageOnSpacebarUtils.FORMAT_TYPE_FULL_LOCALE;
 import static com.android.inputmethod.latin.utils.LanguageOnSpacebarUtils.FORMAT_TYPE_LANGUAGE_ONLY;
 import static com.android.inputmethod.latin.utils.LanguageOnSpacebarUtils.FORMAT_TYPE_NONE;
+
 import static org.junit.Assert.assertEquals;
 
 import android.content.Context;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.inputmethod.InputMethodSubtype;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.inputmethod.latin.RichInputMethodManager;
 import com.android.inputmethod.latin.RichInputMethodSubtype;
 import com.android.inputmethod.latin.utils.AdditionalSubtypeUtils;
 import com.android.inputmethod.latin.utils.LanguageOnSpacebarUtils;
 import com.android.inputmethod.latin.utils.SubtypeLocaleUtils;
 
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.util.ArrayList;
 import java.util.Locale;
 
 import javax.annotation.Nonnull;
 
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class LanguageOnSpacebarUtilsTests {
diff --git a/tests/src/com/android/inputmethod/latin/utils/RecapitalizeStatusTests.java b/tests/src/com/android/inputmethod/latin/utils/RecapitalizeStatusTests.java
index 8224272a6..0908f2b54 100644
--- a/tests/src/com/android/inputmethod/latin/utils/RecapitalizeStatusTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/RecapitalizeStatusTests.java
@@ -18,16 +18,16 @@ package com.android.inputmethod.latin.utils;
 
 import static org.junit.Assert.assertEquals;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.inputmethod.latin.common.Constants;
 
-import java.util.Locale;
-
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Locale;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class RecapitalizeStatusTests {
diff --git a/tests/src/com/android/inputmethod/latin/utils/ResourceUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/ResourceUtilsTests.java
index ac05d3c31..4aab96a55 100644
--- a/tests/src/com/android/inputmethod/latin/utils/ResourceUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/ResourceUtilsTests.java
@@ -19,15 +19,14 @@ package com.android.inputmethod.latin.utils;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
-import java.util.HashMap;
-
-import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.HashMap;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class ResourceUtilsTests {
diff --git a/tests/src/com/android/inputmethod/latin/utils/SpannableStringUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/SpannableStringUtilsTests.java
index 9a6b8629c..a5987cf13 100644
--- a/tests/src/com/android/inputmethod/latin/utils/SpannableStringUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/SpannableStringUtilsTests.java
@@ -20,15 +20,16 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
 import android.content.Context;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-import android.text.style.SuggestionSpan;
-import android.text.style.URLSpan;
 import android.text.SpannableString;
 import android.text.SpannableStringBuilder;
 import android.text.Spanned;
 import android.text.SpannedString;
+import android.text.style.SuggestionSpan;
+import android.text.style.URLSpan;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/src/com/android/inputmethod/latin/utils/SubtypeLocaleUtilsTests.java b/tests/src/com/android/inputmethod/latin/utils/SubtypeLocaleUtilsTests.java
index 8e47f3ae4..6764fd880 100644
--- a/tests/src/com/android/inputmethod/latin/utils/SubtypeLocaleUtilsTests.java
+++ b/tests/src/com/android/inputmethod/latin/utils/SubtypeLocaleUtilsTests.java
@@ -23,24 +23,25 @@ import static org.junit.Assert.assertTrue;
 
 import android.content.Context;
 import android.content.res.Resources;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.inputmethod.InputMethodInfo;
 import android.view.inputmethod.InputMethodSubtype;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.RichInputMethodManager;
 import com.android.inputmethod.latin.RichInputMethodSubtype;
 
-import java.util.ArrayList;
-import java.util.Locale;
-
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.ArrayList;
+import java.util.Locale;
+
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class SubtypeLocaleUtilsTests {