diff --git a/core/java/android/transparency/BinaryTransparencyManager.java b/core/java/android/transparency/BinaryTransparencyManager.java
index f6d7c61..d77bbcc 100644
--- a/core/java/android/transparency/BinaryTransparencyManager.java
+++ b/core/java/android/transparency/BinaryTransparencyManager.java
@@ -19,6 +19,7 @@
 import android.annotation.NonNull;
 import android.annotation.SystemService;
 import android.content.Context;
+import android.os.Bundle;
 import android.os.RemoteException;
 import android.util.Slog;
 
@@ -83,4 +84,36 @@
         }
     }
 
+    /**
+     * Collects the APEX information on the device.
+     *
+     * @param includeTestOnly Whether to include test only data in the returned ApexInfo.
+     * @return A List containing the APEX info.
+     * @hide
+     */
+    @NonNull
+    public List<IBinaryTransparencyService.ApexInfo> collectAllApexInfo(boolean includeTestOnly) {
+        try {
+            return mService.collectAllApexInfo(includeTestOnly);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Collects the updated preload information on the device.
+     *
+     * @return A List containing the preload info.
+     * @hide
+     */
+    @NonNull
+    public List<IBinaryTransparencyService.AppInfo> collectAllUpdatedPreloadInfo(
+            Bundle packagesToSkip) {
+        try {
+            Slog.d(TAG, "Calling backend's collectAllUpdatedPreloadInfo()");
+            return mService.collectAllUpdatedPreloadInfo(packagesToSkip);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
 }
diff --git a/core/java/com/android/internal/os/IBinaryTransparencyService.aidl b/core/java/com/android/internal/os/IBinaryTransparencyService.aidl
index b4a0aac..fb34345 100644
--- a/core/java/com/android/internal/os/IBinaryTransparencyService.aidl
+++ b/core/java/com/android/internal/os/IBinaryTransparencyService.aidl
@@ -16,6 +16,8 @@
 
 package com.android.internal.os;
 
+import android.os.Bundle;
+
 /**
  * "Backend" interface used by {@link android.os.BinaryTransparencyManager} to talk to the
  * BinaryTransparencyService that actually implements the measurement and information aggregation
@@ -36,6 +38,9 @@
         byte[] digest;
         int digestAlgorithm;
         String[] signerDigests;
+
+        // Test only
+        String moduleName;
     }
 
     parcelable AppInfo {
@@ -50,4 +55,8 @@
         String installer;
         String originator;
     }
+
+    /** Test only */
+    List<ApexInfo> collectAllApexInfo(boolean includeTestOnly);
+    List<AppInfo> collectAllUpdatedPreloadInfo(in Bundle packagesToSkip);
 }
\ No newline at end of file
diff --git a/services/core/java/com/android/server/BinaryTransparencyService.java b/services/core/java/com/android/server/BinaryTransparencyService.java
index c17a2ec..6fdbc0d 100644
--- a/services/core/java/com/android/server/BinaryTransparencyService.java
+++ b/services/core/java/com/android/server/BinaryTransparencyService.java
@@ -93,10 +93,8 @@
 import java.security.PublicKey;
 import java.security.cert.CertificateException;
 import java.util.ArrayList;
-import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
-import java.util.Set;
 import java.util.concurrent.Executors;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.stream.Collectors;
@@ -300,15 +298,16 @@
                     + " and is now updated to: " + currentTimeMs);
             mMeasurementsLastRecordedMs = currentTimeMs;
 
-            Set<String> packagesMeasured = new HashSet<>();
+            Bundle packagesMeasured = new Bundle();
 
             // measure all APEXs first
             if (DEBUG) {
                 Slog.d(TAG, "Measuring APEXs...");
             }
-            List<IBinaryTransparencyService.ApexInfo> allApexInfo = collectAllApexInfo();
+            List<IBinaryTransparencyService.ApexInfo> allApexInfo = collectAllApexInfo(
+                    /* includeTestOnly */ false);
             for (IBinaryTransparencyService.ApexInfo apexInfo : allApexInfo) {
-                packagesMeasured.add(apexInfo.packageName);
+                packagesMeasured.putBoolean(apexInfo.packageName, true);
 
                 recordApexInfo(apexInfo);
             }
@@ -321,7 +320,7 @@
             List<IBinaryTransparencyService.AppInfo> allUpdatedPreloadInfo =
                     collectAllUpdatedPreloadInfo(packagesMeasured);
             for (IBinaryTransparencyService.AppInfo appInfo : allUpdatedPreloadInfo) {
-                packagesMeasured.add(appInfo.packageName);
+                packagesMeasured.putBoolean(appInfo.packageName, true);
                 writeAppInfoToLog(appInfo);
             }
             if (DEBUG) {
@@ -334,7 +333,7 @@
                 List<IBinaryTransparencyService.AppInfo> allMbaInfo =
                         collectAllMbaInfo(packagesMeasured);
                 for (IBinaryTransparencyService.AppInfo appInfo : allUpdatedPreloadInfo) {
-                    packagesMeasured.add(appInfo.packageName);
+                    packagesMeasured.putBoolean(appInfo.packageName, true);
                     writeAppInfoToLog(appInfo);
                 }
             }
@@ -345,7 +344,9 @@
             }
         }
 
-        private List<IBinaryTransparencyService.ApexInfo> collectAllApexInfo() {
+        @Override
+        public List<IBinaryTransparencyService.ApexInfo> collectAllApexInfo(
+                boolean includeTestOnly) {
             var results = new ArrayList<IBinaryTransparencyService.ApexInfo>();
             for (PackageInfo packageInfo : getCurrentInstalledApexs()) {
                 PackageState packageState = mPackageManagerInternal.getPackageStateInternal(
@@ -371,13 +372,19 @@
                 apexInfo.signerDigests =
                         computePackageSignerSha256Digests(packageState.getSigningInfo());
 
+                if (includeTestOnly) {
+                    apexInfo.moduleName = apexPackageNameToModuleName(
+                            packageState.getPackageName());
+                }
+
                 results.add(apexInfo);
             }
             return results;
         }
 
-        private List<IBinaryTransparencyService.AppInfo> collectAllUpdatedPreloadInfo(
-                Set<String> packagesToSkip) {
+        @Override
+        public List<IBinaryTransparencyService.AppInfo> collectAllUpdatedPreloadInfo(
+                Bundle packagesToSkip) {
             final var results = new ArrayList<IBinaryTransparencyService.AppInfo>();
 
             PackageManager pm = mContext.getPackageManager();
@@ -385,7 +392,7 @@
                 if (!packageState.isUpdatedSystemApp()) {
                     return;
                 }
-                if (packagesToSkip.contains(packageState.getPackageName())) {
+                if (packagesToSkip.containsKey(packageState.getPackageName())) {
                     return;
                 }
 
@@ -413,11 +420,10 @@
             return results;
         }
 
-        private List<IBinaryTransparencyService.AppInfo> collectAllMbaInfo(
-                Set<String> packagesToSkip) {
+        public List<IBinaryTransparencyService.AppInfo> collectAllMbaInfo(Bundle packagesToSkip) {
             var results = new ArrayList<IBinaryTransparencyService.AppInfo>();
             for (PackageInfo packageInfo : getNewlyInstalledMbas()) {
-                if (packagesToSkip.contains(packageInfo.packageName)) {
+                if (packagesToSkip.containsKey(packageInfo.packageName)) {
                     continue;
                 }
                 PackageState packageState = mPackageManagerInternal.getPackageStateInternal(
@@ -1654,11 +1660,7 @@
     private String getOriginalApexPreinstalledLocation(String packageName,
             String currentInstalledLocation) {
         try {
-            // It appears that only apexd knows the preinstalled location, and it uses module name
-            // as the identifier instead of package name. Given the input is a package name, we
-            // need to covert to module name.
-            final String moduleName = ApexManager.getInstance().getApexModuleNameForPackageName(
-                    packageName);
+            final String moduleName = apexPackageNameToModuleName(packageName);
             IApexService apexService = IApexService.Stub.asInterface(
                     Binder.allowBlocking(ServiceManager.waitForService("apexservice")));
             for (ApexInfo info : apexService.getAllPackages()) {
@@ -1672,6 +1674,13 @@
         return APEX_PRELOAD_LOCATION_ERROR;
     }
 
+    private String apexPackageNameToModuleName(String packageName) {
+        // It appears that only apexd knows the preinstalled location, and it uses module name as
+        // the identifier instead of package name. Given the input is a package name, we need to
+        // covert to module name.
+        return ApexManager.getInstance().getApexModuleNameForPackageName(packageName);
+    }
+
     /**
      * Wrapper method to call into IBICS to get a list of all newly installed MBAs.
      *
diff --git a/tests/BinaryTransparencyHostTest/Android.bp b/tests/BinaryTransparencyHostTest/Android.bp
new file mode 100644
index 0000000..142e3dd
--- /dev/null
+++ b/tests/BinaryTransparencyHostTest/Android.bp
@@ -0,0 +1,42 @@
+// Copyright (C) 2023 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 {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "frameworks_base_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    default_applicable_licenses: ["frameworks_base_license"],
+}
+
+java_test_host {
+    name: "BinaryTransparencyHostTest",
+    srcs: ["src/**/*.java"],
+    libs: [
+        "tradefed",
+        "compatibility-tradefed",
+        "compatibility-host-util",
+    ],
+    static_libs: [
+        "truth-prebuilt",
+    ],
+    data: [
+        ":BinaryTransparencyTestApp",
+        ":EasterEgg",
+    ],
+    test_suites: [
+        "general-tests",
+    ],
+}
diff --git a/tests/BinaryTransparencyHostTest/AndroidTest.xml b/tests/BinaryTransparencyHostTest/AndroidTest.xml
new file mode 100644
index 0000000..e0d11c0
--- /dev/null
+++ b/tests/BinaryTransparencyHostTest/AndroidTest.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2023 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.
+-->
+<configuration description="Binary Transparency integration test">
+    <option name="test-suite-tag" value="apct" />
+
+    <!-- Service is not exposed to apps. Disable SELinux for testing purpose. -->
+    <target_preparer class="com.android.tradefed.targetprep.DisableSELinuxTargetPreparer" />
+
+    <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
+        <option name="cleanup-apks" value="true" />
+        <option name="test-file-name" value="BinaryTransparencyTestApp.apk" />
+    </target_preparer>
+
+    <test class="com.android.compatibility.common.tradefed.testtype.JarHostTest" >
+        <option name="jar" value="BinaryTransparencyHostTest.jar" />
+        <option name="runtime-hint" value="1m" />
+    </test>
+</configuration>
diff --git a/tests/BinaryTransparencyHostTest/OWNERS b/tests/BinaryTransparencyHostTest/OWNERS
new file mode 100644
index 0000000..ca84550
--- /dev/null
+++ b/tests/BinaryTransparencyHostTest/OWNERS
@@ -0,0 +1 @@
+include /core/java/android/transparency/OWNERS
diff --git a/tests/BinaryTransparencyHostTest/src/android/transparency/test/BinaryTransparencyHostTest.java b/tests/BinaryTransparencyHostTest/src/android/transparency/test/BinaryTransparencyHostTest.java
new file mode 100644
index 0000000..84bed92
--- /dev/null
+++ b/tests/BinaryTransparencyHostTest/src/android/transparency/test/BinaryTransparencyHostTest.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2023 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 android.transparency.test;
+
+import static org.junit.Assert.assertTrue;
+
+import com.android.tradefed.device.DeviceNotAvailableException;
+import com.android.tradefed.testtype.DeviceJUnit4ClassRunner;
+import com.android.tradefed.testtype.junit4.BaseHostJUnit4Test;
+import com.android.tradefed.testtype.junit4.DeviceTestRunOptions;
+import com.android.tradefed.util.CommandResult;
+import com.android.tradefed.util.CommandStatus;
+
+import org.junit.After;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+// TODO: Add @Presubmit
+@RunWith(DeviceJUnit4ClassRunner.class)
+public final class BinaryTransparencyHostTest extends BaseHostJUnit4Test {
+    private static final String PACKAGE_NAME = "android.transparency.test.app";
+
+    @After
+    public void tearDown() throws Exception {
+        uninstallPackage("com.android.egg");
+    }
+
+    @Test
+    public void testCollectAllApexInfo() throws Exception {
+        var options = new DeviceTestRunOptions(PACKAGE_NAME);
+        options.setTestClassName(PACKAGE_NAME + ".BinaryTransparencyTest");
+        options.setTestMethodName("testCollectAllApexInfo");
+
+        // Collect APEX package names from /apex, then pass them as expectation to be verified.
+        CommandResult result = getDevice().executeShellV2Command(
+                "ls -d /apex/*/ |grep -v @ |grep -v /apex/sharedlibs |cut -d/ -f3");
+        assertTrue(result.getStatus() == CommandStatus.SUCCESS);
+        String[] packageNames = result.getStdout().split("\n");
+        for (var i = 0; i < packageNames.length; i++) {
+            options.addInstrumentationArg("apex-" + String.valueOf(i), packageNames[i]);
+        }
+        options.addInstrumentationArg("apex-number", Integer.toString(packageNames.length));
+        runDeviceTests(options);
+    }
+
+    @Test
+    public void testCollectAllUpdatedPreloadInfo() throws Exception {
+        installPackage("EasterEgg.apk");
+        runDeviceTest("testCollectAllUpdatedPreloadInfo");
+    }
+
+    @Test
+    public void testMeasureMbas() throws Exception {
+        // TODO(265244016): figure out a way to install an MBA
+    }
+
+    private void runDeviceTest(String method) throws DeviceNotAvailableException {
+        var options = new DeviceTestRunOptions(PACKAGE_NAME);
+        options.setTestClassName(PACKAGE_NAME + ".BinaryTransparencyTest");
+        options.setTestMethodName(method);
+        runDeviceTests(options);
+    }
+}
diff --git a/tests/BinaryTransparencyHostTest/test-app/Android.bp b/tests/BinaryTransparencyHostTest/test-app/Android.bp
new file mode 100644
index 0000000..b5193dd
--- /dev/null
+++ b/tests/BinaryTransparencyHostTest/test-app/Android.bp
@@ -0,0 +1,40 @@
+// Copyright (C) 2023 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 {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "frameworks_base_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    default_applicable_licenses: ["frameworks_base_license"],
+}
+
+android_test_helper_app {
+    name: "BinaryTransparencyTestApp",
+    manifest: "AndroidManifest.xml",
+    srcs: ["src/**/*.java"],
+    static_libs: [
+        "androidx.test.core",
+        "compatibility-device-util-axt",
+        "junit",
+    ],
+    test_suites: [
+        "general-tests",
+    ],
+    platform_apis: true,
+    dex_preopt: {
+        enabled: false,
+    },
+}
diff --git a/tests/BinaryTransparencyHostTest/test-app/AndroidManifest.xml b/tests/BinaryTransparencyHostTest/test-app/AndroidManifest.xml
new file mode 100644
index 0000000..42e616e
--- /dev/null
+++ b/tests/BinaryTransparencyHostTest/test-app/AndroidManifest.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ * Copyright (C) 2023 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.
+ -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="android.transparency.test.app">
+    <application>
+        <uses-library android:name="android.test.runner" />
+    </application>
+
+    <instrumentation android:name="androidx.test.runner.AndroidJUnitRunner"
+        android:label="APCT tests for binary transparency"
+        android:targetPackage="android.transparency.test.app" />
+</manifest>
diff --git a/tests/BinaryTransparencyHostTest/test-app/src/android/transparency/test/app/BinaryTransparencyTest.java b/tests/BinaryTransparencyHostTest/test-app/src/android/transparency/test/app/BinaryTransparencyTest.java
new file mode 100644
index 0000000..aedb366
--- /dev/null
+++ b/tests/BinaryTransparencyHostTest/test-app/src/android/transparency/test/app/BinaryTransparencyTest.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2023 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 android.transparency.test.app;
+
+import static com.google.common.truth.Truth.assertThat;
+import static com.google.common.truth.Truth.assertWithMessage;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.transparency.BinaryTransparencyManager;
+import android.util.Log;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.runner.AndroidJUnit4;
+
+import com.android.internal.os.IBinaryTransparencyService.AppInfo;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.HashSet;
+import java.util.HexFormat;
+import java.util.stream.Collectors;
+
+@RunWith(AndroidJUnit4.class)
+public class BinaryTransparencyTest {
+    private static final String TAG = "BinaryTransparencyTest";
+
+    private BinaryTransparencyManager mBt;
+
+    @Before
+    public void setUp() {
+        Context context = InstrumentationRegistry.getInstrumentation().getContext();
+        mBt = context.getSystemService(BinaryTransparencyManager.class);
+    }
+
+    @Test
+    public void testCollectAllApexInfo() {
+        // Prepare the expectation received from host's shell command
+        Bundle args = InstrumentationRegistry.getArguments();
+        assertThat(args).isNotNull();
+        int number = Integer.valueOf(args.getString("apex-number"));
+        assertThat(number).isGreaterThan(0);
+        var expectedApexNames = new HashSet<String>();
+        for (var i = 0; i < number; i++) {
+            String moduleName = args.getString("apex-" + Integer.toString(i));
+            expectedApexNames.add(moduleName);
+        }
+
+        // Action
+        var apexInfoList = mBt.collectAllApexInfo(/* includeTestOnly */ true);
+
+        // Verify actual apex names
+        var actualApexesNames = apexInfoList.stream().map((apex) -> apex.moduleName)
+                .collect(Collectors.toList());
+        assertThat(actualApexesNames).containsExactlyElementsIn(expectedApexNames);
+
+        // Perform more valitidy checks
+        var digestsSeen = new HashSet<String>();
+        var hexFormatter = HexFormat.of();
+        for (var apex : apexInfoList) {
+            Log.d(TAG, "Verifying " + apex.packageName + " / " + apex.moduleName);
+
+            assertThat(apex.longVersion).isGreaterThan(0);
+            assertThat(apex.digestAlgorithm).isGreaterThan(0);
+            assertThat(apex.signerDigests).asList().containsNoneOf(null, "");
+
+            assertThat(apex.digest).isNotNull();
+            String digestHex = hexFormatter.formatHex(apex.digest);
+            boolean isNew = digestsSeen.add(digestHex);
+            assertWithMessage(
+                    "Digest should be unique, but received a dup: " + digestHex)
+                    .that(isNew).isTrue();
+        }
+    }
+
+    @Test
+    public void testCollectAllUpdatedPreloadInfo() {
+        var preloadInfoList = mBt.collectAllUpdatedPreloadInfo(new Bundle());
+        assertThat(preloadInfoList).isNotEmpty();  // because we just installed from the host side
+        AppInfo updatedPreload = null;
+        for (var preload : preloadInfoList) {
+            Log.d(TAG, "Received " + preload.packageName);
+            if (preload.packageName.equals("com.android.egg")) {
+                assertWithMessage("Received the same package").that(updatedPreload).isNull();
+                updatedPreload = preload;
+            }
+        }
+
+        // Verify
+        assertThat(updatedPreload.longVersion).isGreaterThan(0);
+        assertThat(updatedPreload.digestAlgorithm).isGreaterThan(0);
+        assertThat(updatedPreload.digest).isNotEmpty();
+        assertThat(updatedPreload.mbaStatus).isEqualTo(/* MBA_STATUS_UPDATED_PRELOAD */ 2);
+        assertThat(updatedPreload.signerDigests).asList().containsNoneOf(null, "");
+    }
+}