diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index 74fc8d1..231c4b7 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -136,9 +136,13 @@
             CORE_POOL_SIZE, MAXIMUM_POOL_SIZE, KEEP_ALIVE,
             TimeUnit.SECONDS, new LinkedBlockingQueue<Runnable>());
 
-    public static final boolean IS_RUNNING_IN_TEST_HARNESS =
+    public static boolean IS_RUNNING_IN_TEST_HARNESS =
                     ActivityManager.isRunningInTestHarness();
 
+    public static void enableRunningInTestHarnessForTests() {
+        IS_RUNNING_IN_TEST_HARNESS = true;
+    }
+
     public static boolean isPropertyEnabled(String propertyName) {
         return Log.isLoggable(propertyName, Log.VERBOSE);
     }
diff --git a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
index fc8e1c5..6c44d81 100644
--- a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
+++ b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
@@ -49,6 +49,7 @@
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.MainThreadExecutor;
 import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
 import com.android.launcher3.compat.AppWidgetManagerCompat;
 import com.android.launcher3.compat.LauncherAppsCompat;
 import com.android.launcher3.tapl.LauncherInstrumentation;
@@ -94,13 +95,14 @@
     private static final String TAG = "AbstractLauncherUiTest";
 
     protected AbstractLauncherUiTest() {
-        final Instrumentation instrumentation =TestHelpers.getInstrumentation();
+        final Instrumentation instrumentation = TestHelpers.getInstrumentation();
         mDevice = UiDevice.getInstance(instrumentation);
         try {
             mDevice.setOrientationNatural();
         } catch (RemoteException e) {
             throw new RuntimeException(e);
         }
+        if (TestHelpers.isInLauncherProcess()) Utilities.enableRunningInTestHarnessForTests();
         mLauncher = new LauncherInstrumentation(instrumentation);
     }
 
diff --git a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
index 7885e3c..66dfe41 100644
--- a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
+++ b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
@@ -108,7 +108,15 @@
                 instrumentation.getTargetContext().getContentResolver(),
                 SWIPE_UP_SETTING_NAME,
                 swipeUpEnabledDefault ? 1 : 0) == 1;
-        assertTrue("Device must run in a test harness", ActivityManager.isRunningInTestHarness());
+
+        // Launcher should run in test harness so that custom accessibility protocol between
+        // Launcher and TAPL is enabled. In-process tests enable this protocol with a direct call
+        // into Launcher.
+        final boolean isInLauncherProcess =
+                instrumentation.getTargetContext().getPackageName().equals(
+                        UiDevice.getInstance(instrumentation).getLauncherPackageName());
+        assertTrue("Device must run in a test harness",
+                isInLauncherProcess || ActivityManager.isRunningInTestHarness());
     }
 
     // Used only by TaplTests.