diff --git a/app/core/src/main/java/com/topjohnwu/magisk/test/AdditionalTest.kt b/app/core/src/main/java/com/topjohnwu/magisk/test/AdditionalTest.kt
index f157ebe8c..dcba012f5 100644
--- a/app/core/src/main/java/com/topjohnwu/magisk/test/AdditionalTest.kt
+++ b/app/core/src/main/java/com/topjohnwu/magisk/test/AdditionalTest.kt
@@ -1,16 +1,13 @@
 package com.topjohnwu.magisk.test
 
-import android.app.UiAutomation
+import android.os.ParcelFileDescriptor.AutoCloseInputStream
 import androidx.annotation.Keep
 import androidx.test.ext.junit.runners.AndroidJUnit4
-import androidx.test.platform.app.InstrumentationRegistry
 import androidx.test.uiautomator.By
-import androidx.test.uiautomator.UiDevice
 import androidx.test.uiautomator.Until
 import org.junit.After
 import org.junit.Assert.assertNotNull
 import org.junit.Assume.assumeTrue
-import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
 import java.util.concurrent.TimeUnit
@@ -18,7 +15,7 @@ import java.util.regex.Pattern
 
 @Keep
 @RunWith(AndroidJUnit4::class)
-class AdditionalTest {
+class AdditionalTest : BaseTest {
 
     companion object {
         private const val SHELL_PKG = "com.android.shell"
@@ -26,16 +23,6 @@ class AdditionalTest {
         private const val LSPOSED_PKG = "org.lsposed.manager"
     }
 
-    private lateinit var uiAutomation: UiAutomation
-    private lateinit var device: UiDevice
-
-    @Before
-    fun setup() {
-        val inst = InstrumentationRegistry.getInstrumentation()
-        uiAutomation = inst.uiAutomation
-        device = UiDevice.getInstance(inst)
-    }
-
     @After
     fun teardown() {
         device.pressHome()
@@ -47,7 +34,8 @@ class AdditionalTest {
 
         uiAutomation.executeShellCommand(
             "am start -c $LSPOSED_CATEGORY $SHELL_PKG/.BugreportWarningActivity"
-        )
+        ).let { pfd -> AutoCloseInputStream(pfd).use { it.readBytes() } }
+
         val pattern = Pattern.compile("$LSPOSED_PKG:id/.*")
         assertNotNull(
             "LSPosed manager launch failed",
diff --git a/app/core/src/main/java/com/topjohnwu/magisk/test/BaseTest.kt b/app/core/src/main/java/com/topjohnwu/magisk/test/BaseTest.kt
new file mode 100644
index 000000000..73835f34f
--- /dev/null
+++ b/app/core/src/main/java/com/topjohnwu/magisk/test/BaseTest.kt
@@ -0,0 +1,26 @@
+package com.topjohnwu.magisk.test
+
+import android.app.Instrumentation
+import android.app.UiAutomation
+import android.content.Context
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.uiautomator.UiDevice
+import com.topjohnwu.magisk.core.utils.RootUtils
+import com.topjohnwu.superuser.Shell
+import org.junit.Assert.assertTrue
+
+interface BaseTest {
+    val instrumentation: Instrumentation
+        get() = InstrumentationRegistry.getInstrumentation()
+    val context: Context get() = instrumentation.targetContext
+    val uiAutomation: UiAutomation get() = instrumentation.uiAutomation
+    val device: UiDevice get() = UiDevice.getInstance(instrumentation)
+
+    companion object {
+        fun prerequisite() {
+            assertTrue("Should have root access", Shell.getShell().isRoot)
+            // Make sure the root service is running
+            RootUtils.Connection.await()
+        }
+    }
+}
diff --git a/app/core/src/main/java/com/topjohnwu/magisk/test/Environment.kt b/app/core/src/main/java/com/topjohnwu/magisk/test/Environment.kt
index c5597161b..5112c1bf8 100644
--- a/app/core/src/main/java/com/topjohnwu/magisk/test/Environment.kt
+++ b/app/core/src/main/java/com/topjohnwu/magisk/test/Environment.kt
@@ -1,12 +1,10 @@
 package com.topjohnwu.magisk.test
 
 import android.app.Notification
-import android.content.Context
 import android.os.Build
 import androidx.annotation.Keep
 import androidx.core.net.toUri
 import androidx.test.ext.junit.runners.AndroidJUnit4
-import androidx.test.platform.app.InstrumentationRegistry
 import com.topjohnwu.magisk.core.BuildConfig.APP_PACKAGE_NAME
 import com.topjohnwu.magisk.core.di.ServiceLocator
 import com.topjohnwu.magisk.core.download.DownloadNotifier
@@ -15,13 +13,10 @@ import com.topjohnwu.magisk.core.ktx.cachedFile
 import com.topjohnwu.magisk.core.tasks.AppMigration
 import com.topjohnwu.magisk.core.tasks.FlashZip
 import com.topjohnwu.magisk.core.tasks.MagiskInstaller
-import com.topjohnwu.magisk.core.utils.RootUtils
 import com.topjohnwu.superuser.CallbackList
-import com.topjohnwu.superuser.Shell
 import kotlinx.coroutines.runBlocking
 import org.junit.Assert.assertTrue
 import org.junit.Assume.assumeTrue
-import org.junit.Before
 import org.junit.BeforeClass
 import org.junit.Test
 import org.junit.runner.RunWith
@@ -29,16 +24,12 @@ import timber.log.Timber
 
 @Keep
 @RunWith(AndroidJUnit4::class)
-class Environment {
+class Environment : BaseTest {
 
     companion object {
         @BeforeClass
         @JvmStatic
-        fun before() {
-            assertTrue("Should have root access", Shell.getShell().isRoot)
-            // Make sure the root service is running
-            RootUtils.Connection.await()
-        }
+        fun before() = BaseTest.prerequisite()
 
         fun lsposed(): Boolean {
             return Build.VERSION.SDK_INT >= 27 && Build.VERSION.SDK_INT <= 34
@@ -54,13 +45,6 @@ class Environment {
         }
     }
 
-    private lateinit var mContext: Context
-
-    @Before
-    fun setup() {
-        mContext = InstrumentationRegistry.getInstrumentation().targetContext
-    }
-
     @Test
     fun setupMagisk() {
         runBlocking {
@@ -76,11 +60,11 @@ class Environment {
         assumeTrue(lsposed())
 
         val notify = object : DownloadNotifier {
-            override val context = mContext
+            override val context = this@Environment.context
             override fun notifyUpdate(id: Int, editor: (Notification.Builder) -> Unit) {}
         }
         val processor = DownloadProcessor(notify)
-        val zip = mContext.cachedFile("lsposed.zip")
+        val zip = context.cachedFile("lsposed.zip")
         runBlocking {
             ServiceLocator.networkService.fetchFile(LSPOSED_URL).byteStream().use {
                 processor.handleModule(it, zip.toUri())
@@ -98,7 +82,7 @@ class Environment {
             assertTrue(
                 "App hiding failed",
                 AppMigration.patchAndHide(
-                    context = mContext,
+                    context = context,
                     label = "Settings",
                     pkg = "repackaged.$APP_PACKAGE_NAME"
                 )
@@ -111,7 +95,7 @@ class Environment {
         runBlocking {
             assertTrue(
                 "App restoration failed",
-                AppMigration.restoreApp(mContext)
+                AppMigration.restoreApp(context)
             )
         }
     }
diff --git a/app/core/src/main/java/com/topjohnwu/magisk/test/MagiskAppTest.kt b/app/core/src/main/java/com/topjohnwu/magisk/test/MagiskAppTest.kt
index a06f9c977..085659d1a 100644
--- a/app/core/src/main/java/com/topjohnwu/magisk/test/MagiskAppTest.kt
+++ b/app/core/src/main/java/com/topjohnwu/magisk/test/MagiskAppTest.kt
@@ -1,12 +1,11 @@
 package com.topjohnwu.magisk.test
 
-import android.app.Instrumentation
 import android.content.Intent
 import android.content.IntentFilter
 import android.os.Build
+import android.os.ParcelFileDescriptor.AutoCloseInputStream
 import androidx.annotation.Keep
 import androidx.test.ext.junit.runners.AndroidJUnit4
-import androidx.test.platform.app.InstrumentationRegistry
 import com.topjohnwu.magisk.core.Config
 import com.topjohnwu.magisk.core.Info
 import com.topjohnwu.magisk.core.di.ServiceLocator
@@ -15,29 +14,19 @@ import kotlinx.coroutines.runBlocking
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertNotNull
 import org.junit.Assert.assertTrue
-import org.junit.Before
 import org.junit.BeforeClass
 import org.junit.Test
 import org.junit.runner.RunWith
-import java.io.FileInputStream
 import java.util.concurrent.TimeUnit
 
 @Keep
 @RunWith(AndroidJUnit4::class)
-class MagiskAppTest {
+class MagiskAppTest : BaseTest {
 
     companion object {
         @BeforeClass
         @JvmStatic
-        fun before() = Environment.before()
-    }
-
-    private lateinit var inst: Instrumentation
-    private val uiAutomation get() = inst.uiAutomation
-
-    @Before
-    fun setup() {
-        inst = InstrumentationRegistry.getInstrumentation()
+        fun before() = BaseTest.prerequisite()
     }
 
     @Test
@@ -64,7 +53,7 @@ class MagiskAppTest {
 
         val filter = IntentFilter(Intent.ACTION_VIEW)
         filter.addCategory(Intent.CATEGORY_DEFAULT)
-        val monitor = inst.addMonitor(filter, null, false)
+        val monitor = instrumentation.addMonitor(filter, null, false)
 
         // Try to call su from ADB shell
         val cmd = if (Build.VERSION.SDK_INT < 24) {
@@ -80,10 +69,10 @@ class MagiskAppTest {
         assertNotNull("SuRequestActivity is not launched", suRequest)
 
         // Check that the request went through
-        FileInputStream(pfd.fileDescriptor).use {
+        AutoCloseInputStream(pfd).reader().use {
             assertTrue(
                 "Cannot grant root permission from shell",
-                it.reader().readText().contains("uid=0")
+                it.readText().contains("uid=0")
             )
         }
 
diff --git a/scripts/test_common.sh b/scripts/test_common.sh
index c7a5216f2..2887943b6 100644
--- a/scripts/test_common.sh
+++ b/scripts/test_common.sh
@@ -59,9 +59,10 @@ run_setup() {
 }
 
 run_tests() {
-  local self='com.topjohnwu.magisk.test/com.topjohnwu.magisk.test.TestRunner'
-  local app='com.topjohnwu.magisk.test/com.topjohnwu.magisk.test.AppTestRunner'
-  local stub='repackaged.com.topjohnwu.magisk.test/com.topjohnwu.magisk.test.AppTestRunner'
+  local pkg='com.topjohnwu.magisk.test'
+  local self="$pkg/$pkg.TestRunner"
+  local app="$pkg/$pkg.AppTestRunner"
+  local stub="repackaged.$pkg/$pkg.AppTestRunner"
 
   # Run app tests
   am_instrument '.MagiskAppTest,.AdditionalTest' $app