diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Bytes.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Bytes.java
index 637cd03..f6e77e6 100644
--- a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Bytes.java
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Bytes.java
@@ -17,6 +17,7 @@
 package com.android.server.nearby.common.bluetooth.fastpair;
 
 import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
 
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
@@ -51,7 +52,8 @@
             return this.mByteOrder.equals(byteOrder) ? getBytes() : reverse(getBytes());
         }
 
-        private static byte[] reverse(byte[] bytes) {
+        @VisibleForTesting
+        static byte[] reverse(byte[] bytes) {
             byte[] reversedBytes = new byte[bytes.length];
             for (int i = 0; i < bytes.length; i++) {
                 reversedBytes[i] = bytes[bytes.length - i - 1];
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnection.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnection.java
index 789ef59..60afa31 100644
--- a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnection.java
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnection.java
@@ -1993,7 +1993,8 @@
         return getLeState(bluetoothAdapter);
     }
 
-    private static int getLeState(android.bluetooth.BluetoothAdapter adapter) {
+    @VisibleForTesting
+    static int getLeState(android.bluetooth.BluetoothAdapter adapter) {
         try {
             return (Integer) Reflect.on(adapter).withMethod("getLeState").get();
         } catch (ReflectionException e) {
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java
index ec6e89a..6a5652b 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java
@@ -63,4 +63,19 @@
         assertThat(elementFromParcel.getKey()).isEqualTo(KEY);
         assertThat(Arrays.equals(elementFromParcel.getValue(), VALUE)).isTrue();
     }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void describeContents() {
+        DataElement dataElement = new DataElement(KEY, VALUE);
+        assertThat(dataElement.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCreatorNewArray() {
+        DataElement[] elements =
+                DataElement.CREATOR.newArray(2);
+        assertThat(elements.length).isEqualTo(2);
+    }
 }
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceTest.java
index 998714c..de27879 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceTest.java
@@ -88,6 +88,7 @@
 
         assertThat(fastPairDevice1.equals(fastPairDevice1)).isTrue();
         assertThat(fastPairDevice1.equals(fastPairDevice2)).isFalse();
+        assertThat(fastPairDevice1.equals(null)).isFalse();
         assertThat(fastPairDevice1.hashCode()).isEqualTo(fastPairDevice2.hashCode());
     }
 
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/PublicCredentialTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/PublicCredentialTest.java
index 05a4598..774e897 100644
--- a/nearby/tests/cts/fastpair/src/android/nearby/cts/PublicCredentialTest.java
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/PublicCredentialTest.java
@@ -135,6 +135,7 @@
                         .setIdentityType(IDENTITY_TYPE_PRIVATE)
                         .build();
         assertThat(credentialOne.equals((Object) credentialTwo)).isTrue();
+        assertThat(credentialOne.equals(null)).isFalse();
     }
 
     @Test
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleSightingTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleSightingTest.java
index b318842..d259851 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleSightingTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleSightingTest.java
@@ -110,7 +110,6 @@
         Parcel dest = Parcel.obtain();
         sighting.writeToParcel(dest, 0);
         dest.setDataPosition(0);
-        BleSighting compareSighting = BleSighting.CREATOR.createFromParcel(dest);
         assertThat(sighting.getRssi()).isEqualTo(RSSI);
     }
 
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bloomfilter/FastPairBloomFilterHasherTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bloomfilter/FastPairBloomFilterHasherTest.java
index 0923b95..92c3b1a 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bloomfilter/FastPairBloomFilterHasherTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bloomfilter/FastPairBloomFilterHasherTest.java
@@ -25,7 +25,6 @@
 import java.nio.charset.Charset;
 
 public class FastPairBloomFilterHasherTest {
-    private static final int BYTE_ARRAY_LENGTH = 100;
     private static final Charset CHARSET = UTF_8;
     private static FastPairBloomFilterHasher sFastPairBloomFilterHasher =
             new FastPairBloomFilterHasher();
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BytesTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BytesTest.java
index 2e46ef9..9450d60 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BytesTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BytesTest.java
@@ -56,4 +56,9 @@
     public void testToString()  {
         assertThat(VALUE1.toString()).isEqualTo("0102");
     }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testReverse()  {
+        assertThat(VALUE1.reverse(new byte[]{1, 2})).isEqualTo(new byte[]{2, 1});
+    }
 }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnectionTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnectionTest.java
index a103a72..63c39b2 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnectionTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnectionTest.java
@@ -23,9 +23,11 @@
 
 import static com.google.common.truth.Truth.assertThat;
 
+import static org.junit.Assert.assertThrows;
 import static org.mockito.ArgumentMatchers.anyBoolean;
 import static org.mockito.ArgumentMatchers.anyShort;
 import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.when;
 
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothDevice;
@@ -45,6 +47,7 @@
 
 import junit.framework.TestCase;
 
+import org.junit.Test;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
@@ -75,6 +78,8 @@
     private TestEventLogger mEventLogger;
     @Mock private TimingLogger mTimingLogger;
     @Mock private BluetoothAudioPairer mBluetoothAudioPairer;
+    @Mock private android.bluetooth.BluetoothAdapter mBluetoothAdapter;
+    @Mock FastPairDualConnection mFastPairDualConnection;
 
     @Override
     public void setUp() throws Exception {
@@ -287,6 +292,23 @@
         }
     }
 
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testReflectionException()
+            throws BluetoothException, ReflectionException, ExecutionException,
+            InterruptedException, PairingException, TimeoutException {
+        when(mFastPairDualConnection.pair())
+                .thenThrow(new ReflectionException(
+                        new NoSuchMethodException("testReflectionException")));
+        ReflectionException exception =
+                assertThrows(
+                        ReflectionException.class,
+                        () -> mFastPairDualConnection.pair());
+        assertThat(exception)
+                .hasMessageThat()
+                .contains("testReflectionException");
+    }
+
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void testHistoryItem() {
         FastPairDualConnection connection = new FastPairDualConnection(
@@ -307,6 +329,11 @@
                 .isFalse();
     }
 
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetLeState() throws ReflectionException {
+        FastPairDualConnection.getLeState(mBluetoothAdapter);
+    }
+
     static class TestEventLogger implements EventLogger {
 
         private List<Item> mLogs = new ArrayList<>();
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HeadsetPieceTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HeadsetPieceTest.java
index 670b2ca..32e62a3 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HeadsetPieceTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HeadsetPieceTest.java
@@ -196,5 +196,63 @@
 
         assertThat(headsetPiece.isBatteryLow()).isFalse();
     }
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void describeContents() {
+        HeadsetPiece headsetPiece =
+                HeadsetPiece.builder()
+                        .setLowLevelThreshold(30)
+                        .setBatteryLevel(18)
+                        .setImageUrl("http://fake.image.path/image.png")
+                        .setCharging(true)
+                        .build();
+        assertThat(headsetPiece.describeContents()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void hashcode() {
+        HeadsetPiece headsetPiece =
+                HeadsetPiece.builder()
+                        .setLowLevelThreshold(30)
+                        .setBatteryLevel(18)
+                        .setImageUrl("http://fake.image.path/image.png")
+                        .setCharging(true)
+                        .build();
+        HeadsetPiece headsetPiece1 =
+                HeadsetPiece.builder()
+                        .setLowLevelThreshold(30)
+                        .setBatteryLevel(18)
+                        .setImageUrl("http://fake.image.path/image.png")
+                        .setCharging(true)
+                        .build();
+        assertThat(headsetPiece.hashCode()).isEqualTo(headsetPiece1.hashCode());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testToString() {
+        HeadsetPiece headsetPiece =
+                HeadsetPiece.builder()
+                        .setLowLevelThreshold(30)
+                        .setBatteryLevel(18)
+                        .setImageUrl("http://fake.image.path/image.png")
+                        .setCharging(true)
+                        .build();
+        assertThat(headsetPiece.toString())
+                .isEqualTo("HeadsetPiece{lowLevelThreshold=30,"
+                        + " batteryLevel=18,"
+                        + " imageUrl=http://fake.image.path/image.png,"
+                        + " charging=true,"
+                        + " imageContentUri=null}");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCreatorNewArray() {
+        HeadsetPiece[]  headsetPieces =
+                HeadsetPiece.CREATOR.newArray(2);
+        assertThat(headsetPieces.length).isEqualTo(2);
+    }
 }
 
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PairingProgressListenerTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PairingProgressListenerTest.java
new file mode 100644
index 0000000..a58a92d
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PairingProgressListenerTest.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import org.junit.Test;
+
+public class PairingProgressListenerTest {
+
+    @Test
+    public void testFromOrdinal() {
+        assertThat(PairingProgressListener.fromOrdinal(0)).isEqualTo(
+                PairingProgressListener.PairingEvent.START);
+        assertThat(PairingProgressListener.fromOrdinal(1)).isEqualTo(
+                PairingProgressListener.PairingEvent.SUCCESS);
+        assertThat(PairingProgressListener.fromOrdinal(2)).isEqualTo(
+                PairingProgressListener.PairingEvent.FAILED);
+        assertThat(PairingProgressListener.fromOrdinal(3)).isEqualTo(
+                PairingProgressListener.PairingEvent.UNKNOWN);
+        assertThat(PairingProgressListener.fromOrdinal(4)).isEqualTo(
+                PairingProgressListener.PairingEvent.UNKNOWN);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PreferencesTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PreferencesTest.java
index b40a5a5..378e3b9 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PreferencesTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PreferencesTest.java
@@ -1266,12 +1266,38 @@
     public void testExtraLoggingInformation() {
         Preferences prefs =
                 Preferences.builder().setExtraLoggingInformation(FIRST_EXTRA_LOGGING_INFO).build();
-        assertThat(prefs.getExtraLoggingInformation()).isEqualTo(FIRST_EXTRA_LOGGING_INFO);
-        assertThat(prefs.toBuilder().build().getExtraLoggingInformation())
-                .isEqualTo(FIRST_EXTRA_LOGGING_INFO);
-
         Preferences prefs2 =
                 Preferences.builder().setExtraLoggingInformation(SECOND_EXTRA_LOGGING_INFO).build();
+        Preferences prefs3 =
+                Preferences.builder().setExtraLoggingInformation(FIRST_EXTRA_LOGGING_INFO).build();
+
+        assertThat(prefs.getExtraLoggingInformation()).isEqualTo(FIRST_EXTRA_LOGGING_INFO);
         assertThat(prefs2.getExtraLoggingInformation()).isEqualTo(SECOND_EXTRA_LOGGING_INFO);
+        assertThat(prefs.toBuilder().build().getExtraLoggingInformation())
+                .isEqualTo(FIRST_EXTRA_LOGGING_INFO);
+        // Test equal()
+        assertThat(prefs.getExtraLoggingInformation().equals(null)).isFalse();
+        assertThat(prefs.getExtraLoggingInformation()
+                .equals(prefs2.getExtraLoggingInformation())).isFalse();
+        assertThat(prefs.getExtraLoggingInformation()
+                .equals(prefs3.getExtraLoggingInformation())).isTrue();
+        // Test getModelId()
+        assertThat(prefs.getExtraLoggingInformation().getModelId())
+                .isEqualTo(prefs3.getExtraLoggingInformation().getModelId());
+        assertThat(prefs.getExtraLoggingInformation().getModelId())
+                .isNotEqualTo(prefs2.getExtraLoggingInformation().getModelId());
+        // Test hashCode()
+        assertThat(prefs.getExtraLoggingInformation().hashCode())
+                .isEqualTo(prefs3.getExtraLoggingInformation().hashCode());
+        assertThat(prefs.getExtraLoggingInformation().hashCode())
+                .isNotEqualTo(prefs2.getExtraLoggingInformation().hashCode());
+        // Test toBuilder()
+
+        assertThat(prefs.getExtraLoggingInformation()
+                .toBuilder().setModelId("000007").build().getModelId())
+                .isEqualTo("000007");
+        // Test toString()
+        assertThat(prefs.getExtraLoggingInformation().toString())
+                .isEqualTo("ExtraLoggingInformation{modelId=000006}");
     }
 }
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/TdsExceptionTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/TdsExceptionTest.java
new file mode 100644
index 0000000..e8b9480
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/TdsExceptionTest.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.android.server.nearby.intdefs.FastPairEventIntDefs;
+
+import org.junit.Test;
+
+public class TdsExceptionTest {
+    @Test
+    public void testGetErrorCode() {
+        TdsException tdsException = new TdsException(
+                FastPairEventIntDefs.BrEdrHandoverErrorCode.BLUETOOTH_MAC_INVALID, "format");
+        assertThat(tdsException.getErrorCode())
+                .isEqualTo(FastPairEventIntDefs.BrEdrHandoverErrorCode.BLUETOOTH_MAC_INVALID);
+
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothAdapterTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothAdapterTest.java
index 6ebe373..a9ab7da 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothAdapterTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothAdapterTest.java
@@ -81,6 +81,8 @@
     public void testEnable_callsWrapped() {
         when(mBluetoothAdapter.enable()).thenReturn(true);
         assertThat(mTestabilityBluetoothAdapter.enable()).isTrue();
+        when(mBluetoothAdapter.isEnabled()).thenReturn(true);
+        assertThat(mTestabilityBluetoothAdapter.isEnabled()).isTrue();
     }
 
     @Test
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothDeviceTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothDeviceTest.java
index a962b16..d494024 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothDeviceTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothDeviceTest.java
@@ -83,6 +83,13 @@
 
     @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testHashCode_asExpected() {
+        assertThat(mTestabilityBluetoothDevice.hashCode())
+                .isEqualTo(BluetoothDevice.wrap(mBluetoothDevice).hashCode());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void testConnectGattWithThreeParameters_callsWrapped() {
         when(mBluetoothDevice
                 .connectGatt(mContext, true, mTestBluetoothGattCallback.unwrap()))
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattWrapperTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattWrapperTest.java
index 199146d..a03a255 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattWrapperTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattWrapperTest.java
@@ -84,6 +84,12 @@
     }
 
     @Test
+    public void testHashCode_asExpected() {
+        assertThat(mBluetoothGattWrapper.hashCode())
+                .isEqualTo(BluetoothGattWrapper.wrap(mBluetoothGatt).hashCode());
+    }
+
+    @Test
     @SdkSuppress(minSdkVersion = 32, codeName = "T")
     public void testGetServices_callsWrapped() {
         when(mBluetoothGatt.getServices()).thenReturn(null);
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/util/BluetoothGattUtilsTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/util/BluetoothGattUtilsTest.java
index 47182c3..7535c06 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/util/BluetoothGattUtilsTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/util/BluetoothGattUtilsTest.java
@@ -34,14 +34,12 @@
 
 import java.lang.reflect.Field;
 import java.lang.reflect.Modifier;
-import java.util.UUID;
 
 /** Unit tests for {@link BluetoothGattUtils}. */
 @Presubmit
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class BluetoothGattUtilsTest {
-    private static final UUID TEST_UUID = UUID.randomUUID();
     private static final ImmutableSet<String> GATT_HIDDEN_CONSTANTS = ImmutableSet.of(
             "GATT_WRITE_REQUEST_BUSY", "GATT_WRITE_REQUEST_FAIL", "GATT_WRITE_REQUEST_SUCCESS");
 
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/HandlerEventLoopImplTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/HandlerEventLoopImplTest.java
index 6b5eaa8..4775456 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/HandlerEventLoopImplTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/HandlerEventLoopImplTest.java
@@ -67,6 +67,12 @@
         assertThat(mExecutedRunnables).isEmpty();
     }
 
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void postEmptyQueueRunnable() {
+        mHandlerEventLoopImpl.postEmptyQueueRunnable(
+                new HandlerEventLoopImplTest.NumberedRunnable(0));
+    }
 
     private class NumberedRunnable extends NamedRunnable {
         private final int mId;
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/FastPairAdvHandlerTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/FastPairAdvHandlerTest.java
index 01f2f46..39ea5a9 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/fastpair/FastPairAdvHandlerTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/FastPairAdvHandlerTest.java
@@ -23,7 +23,6 @@
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
-import android.accounts.Account;
 import android.content.Context;
 import android.nearby.FastPairDevice;
 
@@ -69,7 +68,6 @@
     private static final int TX_POWER = -70;
     private static final byte[] INITIAL_BYTE_ARRAY = new byte[]{0x01, 0x02, 0x03};
     private static final byte[] SALT = new byte[]{0x01};
-    private static final Account ACCOUNT = new Account("abc@google.com", "type1");
 
     LocatorContextWrapper mLocatorContextWrapper;
     FastPairAdvHandler mFastPairAdvHandler;
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/FastPairCacheManagerTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/FastPairCacheManagerTest.java
index 0f6fb19..075699e 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/FastPairCacheManagerTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/FastPairCacheManagerTest.java
@@ -44,7 +44,6 @@
     private static final ByteString ACCOUNT_KEY = ByteString.copyFromUtf8("axgs");
     private static final String MAC_ADDRESS_B = "00:11:22:44";
     private static final ByteString ACCOUNT_KEY_B = ByteString.copyFromUtf8("axgb");
-    private static final String ITEM_ID = "ITEM_ID";
 
     @Mock
     DiscoveryItem mDiscoveryItem;
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/ChreCommunicationTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/ChreCommunicationTest.java
index c90860e..7542d53 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/provider/ChreCommunicationTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/ChreCommunicationTest.java
@@ -113,14 +113,45 @@
 
     @Test
     public void testContextHubTransactionResultToString() {
-        NanoAppMessage message =
-                NanoAppMessage.createMessageToNanoApp(
-                        ChreDiscoveryProvider.NANOAPP_ID,
-                        ChreDiscoveryProvider.NANOAPP_MESSAGE_TYPE_FILTER_RESULT,
-                        new byte[] {1, 2, 3});
         assertThat(
                 mChreCommunication.contextHubTransactionResultToString(
-                        mClient.sendMessageToNanoApp(message))).isEqualTo("RESULT_SUCCESS");
+                        ContextHubTransaction.RESULT_SUCCESS))
+                .isEqualTo("RESULT_SUCCESS");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_UNKNOWN))
+                .isEqualTo("RESULT_FAILED_UNKNOWN");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_BAD_PARAMS))
+                .isEqualTo("RESULT_FAILED_BAD_PARAMS");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_UNINITIALIZED))
+                .isEqualTo("RESULT_FAILED_UNINITIALIZED");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_BUSY))
+                .isEqualTo("RESULT_FAILED_BUSY");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_AT_HUB))
+                .isEqualTo("RESULT_FAILED_AT_HUB");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_TIMEOUT))
+                .isEqualTo("RESULT_FAILED_TIMEOUT");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_SERVICE_INTERNAL_FAILURE))
+                .isEqualTo("RESULT_FAILED_SERVICE_INTERNAL_FAILURE");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(
+                        ContextHubTransaction.RESULT_FAILED_HAL_UNAVAILABLE))
+                .isEqualTo("RESULT_FAILED_HAL_UNAVAILABLE");
+        assertThat(
+                mChreCommunication.contextHubTransactionResultToString(9))
+                .isEqualTo("UNKNOWN_RESULT value=9");
     }
 
     @Test
diff --git a/nearby/tests/unit/src/com/android/server/nearby/util/identity/CallerIdentityTest.java b/nearby/tests/unit/src/com/android/server/nearby/util/identity/CallerIdentityTest.java
index a18aa1f..c29cb92 100644
--- a/nearby/tests/unit/src/com/android/server/nearby/util/identity/CallerIdentityTest.java
+++ b/nearby/tests/unit/src/com/android/server/nearby/util/identity/CallerIdentityTest.java
@@ -33,4 +33,13 @@
         assertThat(callerIdentity.toString()).isEqualTo("100/package_name[attribution_tag]");
         assertThat(callerIdentity.isSystemServer()).isFalse();
     }
+
+    @Test
+    public void testHashCode() {
+        CallerIdentity callerIdentity =
+                CallerIdentity.forTest(UID, PID, PACKAGE_NAME, ATTRIBUTION_TAG);
+        CallerIdentity callerIdentity1 =
+                CallerIdentity.forTest(UID, PID, PACKAGE_NAME, ATTRIBUTION_TAG);
+        assertThat(callerIdentity.hashCode()).isEqualTo(callerIdentity1.hashCode());
+    }
 }