diff --git a/.cirrus.yml b/.cirrus.yml
index 42537515..380e5ddc 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -31,7 +31,7 @@ instrumentation_tests_task:
     adb remount;
     sleep 5;
   assemble_script:
-    ./gradlew :app:assembleRelease :app:assembleAndroidTest
+    ./gradlew :app:assembleRelease :contacts:assembleRelease assembleAndroidTest
   install_app_script:
     timeout 180s bash -c 'while [[ -z $(adb shell mount | grep "/system " | grep "(rw,") ]]; do sleep 1; done;';
     adb wait-for-device shell 'while [[ -z $(getprop sys.boot_completed) ]]; do sleep 1; done;';
@@ -44,7 +44,11 @@ instrumentation_tests_task:
     adb push app/build/outputs/apk/release/app-release.apk /system/priv-app/Seedvault/Seedvault.apk;
     adb push permissions_com.stevesoltys.seedvault.xml /system/etc/permissions/privapp-permissions-seedvault.xml;
     adb push allowlist_com.stevesoltys.seedvault.xml /system/etc/sysconfig/allowlist-seedvault.xml;
+
+    adb shell mkdir -p /system/priv-app/ContactsBackup;
+    adb push contactsbackup/build/outputs/apk/release/contactsbackup-release.apk /system/priv-app/ContactsBackup/contactsbackup.apk;
     adb push contactsbackup/default-permissions_org.calyxos.backup.contacts.xml /system/etc/default-permissions/default-permissions_org.calyxos.backup.contacts.xml;
+
     adb shell bmgr enable true;
     adb reboot;
     adb wait-for-device shell 'while [[ -z $(getprop sys.boot_completed) ]]; do sleep 1; done;';
diff --git a/contactsbackup/build.gradle.kts b/contactsbackup/build.gradle.kts
index adbb4712..a59e8c0f 100644
--- a/contactsbackup/build.gradle.kts
+++ b/contactsbackup/build.gradle.kts
@@ -2,8 +2,6 @@
  * SPDX-FileCopyrightText: 2020 The Calyx Institute
  * SPDX-License-Identifier: Apache-2.0
  */
-import java.io.FileInputStream
-import java.util.Properties
 
 plugins {
     alias(libs.plugins.android.application)
@@ -42,23 +40,18 @@ android {
         isReturnDefaultValues = true
     }
 
-    // optional signingConfigs
-    // On userdebug builds, you can use the testkey here to update the system app
-    val keystorePropertiesFile = project.file("keystore.properties")
-    if (keystorePropertiesFile.exists()) {
-        val keystoreProperties = Properties()
-        keystoreProperties.load(FileInputStream(keystorePropertiesFile))
-
-        signingConfigs {
-            create("release") {
-                keyAlias = keystoreProperties["keyAlias"] as String
-                keyPassword = keystoreProperties["keyPassword"] as String
-                storeFile = file(keystoreProperties["storeFile"] as String)
-                storePassword = keystoreProperties["storePassword"] as String
-            }
+    signingConfigs {
+        create("aosp") {
+            keyAlias = "android"
+            keyPassword = "android"
+            storePassword = "android"
+            storeFile = file("testkey.jks")
         }
-        buildTypes.getByName("release").signingConfig = signingConfigs.getByName("release")
-        buildTypes.getByName("debug").signingConfig = signingConfigs.getByName("release")
+    }
+
+    buildTypes {
+        getByName("release").signingConfig = signingConfigs.getByName("aosp")
+        getByName("debug").signingConfig = signingConfigs.getByName("aosp")
     }
 }
 
@@ -74,6 +67,7 @@ dependencies {
     androidTestImplementation(libs.kotlin.stdlib.jdk8)
     androidTestImplementation("androidx.test.ext:junit:1.1.5")
     androidTestImplementation(
-        "androidx.test.espresso:espresso-core:${libs.versions.espresso.get()}")
+        "androidx.test.espresso:espresso-core:${libs.versions.espresso.get()}"
+    )
     androidTestImplementation("io.mockk:mockk-android:${libs.versions.mockk.get()}")
 }
diff --git a/contactsbackup/testkey.jks b/contactsbackup/testkey.jks
new file mode 100644
index 00000000..6de45e18
Binary files /dev/null and b/contactsbackup/testkey.jks differ