diff --git a/services/core/java/com/android/server/wm/DesktopModeLaunchParamsModifier.java b/services/core/java/com/android/server/wm/DesktopModeLaunchParamsModifier.java
index d55e415..1c59977 100644
--- a/services/core/java/com/android/server/wm/DesktopModeLaunchParamsModifier.java
+++ b/services/core/java/com/android/server/wm/DesktopModeLaunchParamsModifier.java
@@ -48,15 +48,8 @@
     /**
      * Flag to indicate whether to restrict desktop mode to supported devices.
      */
-    @VisibleForTesting
-    static final String ENFORCE_DEVICE_RESTRICTIONS_KEY =
-            "persist.wm.debug.desktop_mode_enforce_device_restrictions";
-
-    /**
-     * Flag to indicate whether to restrict desktop mode to supported devices.
-     */
     private static final boolean ENFORCE_DEVICE_RESTRICTIONS = SystemProperties.getBoolean(
-            ENFORCE_DEVICE_RESTRICTIONS_KEY, true);
+            "persist.wm.debug.desktop_mode_enforce_device_restrictions", true);
 
     private StringBuilder mLogBuilder;
 
diff --git a/services/tests/wmtests/src/com/android/server/wm/DesktopModeLaunchParamsModifierTests.java b/services/tests/wmtests/src/com/android/server/wm/DesktopModeLaunchParamsModifierTests.java
index c2bb162..f92387c 100644
--- a/services/tests/wmtests/src/com/android/server/wm/DesktopModeLaunchParamsModifierTests.java
+++ b/services/tests/wmtests/src/com/android/server/wm/DesktopModeLaunchParamsModifierTests.java
@@ -21,29 +21,24 @@
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_UNDEFINED;
 import static android.app.WindowConfiguration.WINDOWING_MODE_FREEFORM;
 
+import static com.android.dx.mockito.inline.extended.ExtendedMockito.doReturn;
 import static com.android.server.wm.DesktopModeLaunchParamsModifier.DESKTOP_MODE_INITIAL_BOUNDS_SCALE;
-import static com.android.server.wm.DesktopModeLaunchParamsModifier.ENFORCE_DEVICE_RESTRICTIONS_KEY;
 import static com.android.server.wm.LaunchParamsController.LaunchParamsModifier.PHASE_BOUNDS;
 import static com.android.server.wm.LaunchParamsController.LaunchParamsModifier.PHASE_DISPLAY;
 import static com.android.server.wm.LaunchParamsController.LaunchParamsModifier.RESULT_CONTINUE;
 import static com.android.server.wm.LaunchParamsController.LaunchParamsModifier.RESULT_SKIP;
 
 import static org.junit.Assert.assertEquals;
-import static org.mockito.ArgumentMatchers.eq;
-import static org.mockito.Mockito.doReturn;
+import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.when;
 
-import android.content.res.Resources;
 import android.graphics.Rect;
-import android.os.SystemProperties;
 import android.platform.test.annotations.DisableFlags;
 import android.platform.test.annotations.EnableFlags;
 import android.platform.test.annotations.Presubmit;
 
 import androidx.test.filters.SmallTest;
 
-import com.android.internal.R;
 import com.android.server.wm.LaunchParamsController.LaunchParamsModifier.Result;
 import com.android.window.flags.Flags;
 
@@ -51,7 +46,6 @@
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
-import org.mockito.Mockito;
 
 /**
  * Tests for desktop mode task bounds.
@@ -79,6 +73,8 @@
         mCurrent.reset();
         mResult = new LaunchParamsController.LaunchParams();
         mResult.reset();
+
+        mTarget = new DesktopModeLaunchParamsModifier(mContext);
     }
 
     @Test
@@ -207,15 +203,10 @@
 
     private void setupDesktopModeLaunchParamsModifier(boolean isDesktopModeSupported,
             boolean enforceDeviceRestrictions) {
-        Resources mockResources = Mockito.mock(Resources.class);
-        when(mockResources.getBoolean(eq(R.bool.config_isDesktopModeSupported)))
-                .thenReturn(isDesktopModeSupported);
-        doReturn(mockResources).when(mContext).getResources();
-
-        SystemProperties.set(ENFORCE_DEVICE_RESTRICTIONS_KEY,
-                String.valueOf(enforceDeviceRestrictions));
-
-        mTarget = new DesktopModeLaunchParamsModifier(mContext);
+        doReturn(isDesktopModeSupported)
+                .when(() -> DesktopModeLaunchParamsModifier.isDesktopModeSupported(any()));
+        doReturn(enforceDeviceRestrictions)
+                .when(DesktopModeLaunchParamsModifier::enforceDeviceRestrictions);
     }
 
     private class CalculateRequestBuilder {
diff --git a/services/tests/wmtests/src/com/android/server/wm/SystemServicesTestRule.java b/services/tests/wmtests/src/com/android/server/wm/SystemServicesTestRule.java
index 64adff8..87f26e5 100644
--- a/services/tests/wmtests/src/com/android/server/wm/SystemServicesTestRule.java
+++ b/services/tests/wmtests/src/com/android/server/wm/SystemServicesTestRule.java
@@ -200,6 +200,7 @@
                 .mockStatic(DisplayControl.class, mockStubOnly)
                 .mockStatic(LockGuard.class, mockStubOnly)
                 .mockStatic(Watchdog.class, mockStubOnly)
+                .spyStatic(DesktopModeLaunchParamsModifier.class)
                 .strictness(Strictness.LENIENT)
                 .startMocking();