diff --git a/packages/SystemUI/src/com/android/systemui/classifier/FalsingManagerProxy.java b/packages/SystemUI/src/com/android/systemui/classifier/FalsingManagerProxy.java
index 3cc8ec9afbb22..69f243c8ed706 100644
--- a/packages/SystemUI/src/com/android/systemui/classifier/FalsingManagerProxy.java
+++ b/packages/SystemUI/src/com/android/systemui/classifier/FalsingManagerProxy.java
@@ -91,7 +91,7 @@ public class FalsingManagerProxy implements FalsingManager {
     @VisibleForTesting
     public void setupFalsingManager(Context context) {
         boolean brightlineEnabled = DeviceConfig.getBoolean(
-                DeviceConfig.NAMESPACE_SYSTEMUI, BRIGHTLINE_FALSING_MANAGER_ENABLED, false);
+                DeviceConfig.NAMESPACE_SYSTEMUI, BRIGHTLINE_FALSING_MANAGER_ENABLED, true);
         if (!brightlineEnabled) {
             mInternalFalsingManager = new FalsingManagerImpl(context);
         } else {
diff --git a/packages/SystemUI/tests/src/com/android/systemui/classifier/FalsingManagerProxyTest.java b/packages/SystemUI/tests/src/com/android/systemui/classifier/FalsingManagerProxyTest.java
index 329ef1c19a2bc..7ea6493da83da 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/classifier/FalsingManagerProxyTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/classifier/FalsingManagerProxyTest.java
@@ -56,6 +56,9 @@ public class FalsingManagerProxyTest extends SysuiTestCase {
         mHandler = new Handler(mTestableLooper.getLooper());
         mDefaultConfigValue = DeviceConfig.getBoolean(DeviceConfig.NAMESPACE_SYSTEMUI,
                 BRIGHTLINE_FALSING_MANAGER_ENABLED, false);
+        // In case it runs on a device where it's been set to true, set it to false by hand.
+        DeviceConfig.setProperty(DeviceConfig.NAMESPACE_SYSTEMUI,
+                BRIGHTLINE_FALSING_MANAGER_ENABLED, "false", false);
     }
 
     @After