diff --git a/packages/SystemUI/res/layout/status_bar_expanded.xml b/packages/SystemUI/res/layout/status_bar_expanded.xml
index a8ef7c346b951..23f34251b812c 100644
--- a/packages/SystemUI/res/layout/status_bar_expanded.xml
+++ b/packages/SystemUI/res/layout/status_bar_expanded.xml
@@ -73,7 +73,7 @@
             android:id="@+id/qs_edge_guideline"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            systemui:layout_constraintGuide_percent="0.5"
+            systemui:layout_constraintGuide_percent="0.4"
             android:orientation="vertical"/>
 
         <com.android.systemui.statusbar.notification.stack.NotificationStackScrollLayout
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java
index f4ffb207e6651..615ff79feb1e3 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationPanelViewController.java
@@ -868,25 +868,16 @@ public class NotificationPanelViewController extends PanelViewController {
 
     public void updateResources() {
         int qsWidth = mResources.getDimensionPixelSize(R.dimen.qs_panel_width);
-        ViewGroup.LayoutParams lp = mQsFrame.getLayoutParams();
-        if (lp.width != qsWidth) {
-            lp.width = qsWidth;
-            mQsFrame.setLayoutParams(lp);
-        }
-
         int panelWidth = mResources.getDimensionPixelSize(R.dimen.notification_panel_width);
-        lp = mNotificationStackScrollLayoutController.getLayoutParams();
-        if (lp.width != panelWidth) {
-            lp.width = panelWidth;
-            mNotificationStackScrollLayoutController.setLayoutParams(lp);
-        }
 
-        // In order to change the constraints at runtime, all children of the Constraint Layout
-        // must have ids.
+        // To change the constraints at runtime, all children of the ConstraintLayout must have ids
         ensureAllViewsHaveIds(mNotificationContainerParent);
         ConstraintSet constraintSet = new ConstraintSet();
         constraintSet.clone(mNotificationContainerParent);
         if (Utils.shouldUseSplitNotificationShade(mFeatureFlags, mResources)) {
+            // width = 0 to take up all available space within constraints
+            qsWidth = 0;
+            panelWidth = 0;
             constraintSet.connect(R.id.qs_frame, END, R.id.qs_edge_guideline, END);
             constraintSet.connect(
                     R.id.notification_stack_scroller, START,
@@ -895,6 +886,8 @@ public class NotificationPanelViewController extends PanelViewController {
             constraintSet.connect(R.id.qs_frame, END, PARENT_ID, END);
             constraintSet.connect(R.id.notification_stack_scroller, START, PARENT_ID, START);
         }
+        constraintSet.getConstraint(R.id.notification_stack_scroller).layout.mWidth = panelWidth;
+        constraintSet.getConstraint(R.id.qs_frame).layout.mWidth = qsWidth;
         constraintSet.applyTo(mNotificationContainerParent);
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationsQuickSettingsContainer.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationsQuickSettingsContainer.java
index e394ebc65a6b9..0c9ed661925c0 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationsQuickSettingsContainer.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NotificationsQuickSettingsContainer.java
@@ -18,14 +18,12 @@ package com.android.systemui.statusbar.phone;
 
 import android.app.Fragment;
 import android.content.Context;
-import android.content.res.Configuration;
 import android.graphics.Canvas;
 import android.util.AttributeSet;
 import android.view.View;
 import android.view.WindowInsets;
 import android.widget.FrameLayout;
 
-import androidx.annotation.DimenRes;
 import androidx.constraintlayout.widget.ConstraintLayout;
 
 import com.android.systemui.R;
@@ -82,22 +80,6 @@ public class NotificationsQuickSettingsContainer extends ConstraintLayout
         FragmentHostManager.get(this).removeTagListener(QS.TAG, this);
     }
 
-    @Override
-    protected void onConfigurationChanged(Configuration newConfig) {
-        super.onConfigurationChanged(newConfig);
-        reloadWidth(mQsFrame, R.dimen.qs_panel_width);
-        reloadWidth(mStackScroller, R.dimen.notification_panel_width);
-    }
-
-    /**
-     * Loads the given width resource and sets it on the given View.
-     */
-    private void reloadWidth(View view, @DimenRes int width) {
-        LayoutParams params = (LayoutParams) view.getLayoutParams();
-        params.width = getResources().getDimensionPixelSize(width);
-        view.setLayoutParams(params);
-    }
-
     @Override
     public WindowInsets onApplyWindowInsets(WindowInsets insets) {
         mBottomPadding = insets.getStableInsetBottom();
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/NotificationPanelViewTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/NotificationPanelViewTest.java
index 8cb898443fd2d..dd31f522b94da 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/NotificationPanelViewTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/NotificationPanelViewTest.java
@@ -33,6 +33,7 @@ import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
+import android.annotation.IdRes;
 import android.app.ActivityManager;
 import android.app.StatusBarManager;
 import android.content.res.Configuration;
@@ -269,8 +270,9 @@ public class NotificationPanelViewTest extends SysuiTestCase {
         when(mView.findViewById(R.id.qs_frame)).thenReturn(mQsFrame);
         when(mView.findViewById(R.id.keyguard_status_view))
                 .thenReturn(mock(KeyguardStatusView.class));
-        when(mView.findViewById(R.id.keyguard_header)).thenReturn(mKeyguardStatusBar);
         mNotificationContainerParent = new NotificationsQuickSettingsContainer(getContext(), null);
+        mNotificationContainerParent.addView(newViewWithId(R.id.qs_frame));
+        mNotificationContainerParent.addView(newViewWithId(R.id.notification_stack_scroller));
         when(mView.findViewById(R.id.notification_container_parent))
                 .thenReturn(mNotificationContainerParent);
         FlingAnimationUtils.Builder flingAnimationUtilsBuilder = new FlingAnimationUtils.Builder(
@@ -300,10 +302,6 @@ public class NotificationPanelViewTest extends SysuiTestCase {
                 .thenReturn(mKeyguardClockSwitchController);
         when(mKeyguardStatusViewComponent.getKeyguardStatusViewController())
                 .thenReturn(mKeyguardStatusViewController);
-        when(mQsFrame.getLayoutParams()).thenReturn(
-                new ViewGroup.LayoutParams(600, 400));
-        when(mNotificationStackScrollLayoutController.getLayoutParams()).thenReturn(
-                new ViewGroup.LayoutParams(600, 400));
 
         mNotificationPanelViewController = new NotificationPanelViewController(mView,
                 mResources,
@@ -451,7 +449,8 @@ public class NotificationPanelViewTest extends SysuiTestCase {
 
     @Test
     public void testAllChildrenOfNotificationContainer_haveIds() {
-        enableDualPaneShade();
+        enableSplitShade();
+        mNotificationContainerParent.removeAllViews();
         mNotificationContainerParent.addView(newViewWithId(1));
         mNotificationContainerParent.addView(newViewWithId(View.NO_ID));
 
@@ -464,35 +463,59 @@ public class NotificationPanelViewTest extends SysuiTestCase {
     @Test
     public void testSinglePaneShadeLayout_isAlignedToParent() {
         when(mFeatureFlags.isTwoColumnNotificationShadeEnabled()).thenReturn(false);
-        mNotificationContainerParent.addView(newViewWithId(R.id.qs_frame));
-        mNotificationContainerParent.addView(newViewWithId(R.id.notification_stack_scroller));
 
         mNotificationPanelViewController.updateResources();
 
-        ConstraintSet constraintSet = new ConstraintSet();
-        constraintSet.clone(mNotificationContainerParent);
-        ConstraintSet.Layout qsFrameLayout = constraintSet.getConstraint(R.id.qs_frame).layout;
-        ConstraintSet.Layout stackScrollerLayout = constraintSet.getConstraint(
-                R.id.notification_stack_scroller).layout;
-        assertThat(qsFrameLayout.endToEnd).isEqualTo(ConstraintSet.PARENT_ID);
-        assertThat(stackScrollerLayout.startToStart).isEqualTo(ConstraintSet.PARENT_ID);
+        assertThat(getConstraintSetLayout(R.id.qs_frame).endToEnd)
+                .isEqualTo(ConstraintSet.PARENT_ID);
+        assertThat(getConstraintSetLayout(R.id.notification_stack_scroller).startToStart)
+                .isEqualTo(ConstraintSet.PARENT_ID);
     }
 
     @Test
     public void testSplitShadeLayout_isAlignedToGuideline() {
-        enableDualPaneShade();
-        mNotificationContainerParent.addView(newViewWithId(R.id.qs_frame));
-        mNotificationContainerParent.addView(newViewWithId(R.id.notification_stack_scroller));
+        enableSplitShade();
 
         mNotificationPanelViewController.updateResources();
 
-        ConstraintSet constraintSet = new ConstraintSet();
-        constraintSet.clone(mNotificationContainerParent);
-        ConstraintSet.Layout qsFrameLayout = constraintSet.getConstraint(R.id.qs_frame).layout;
-        ConstraintSet.Layout stackScrollerLayout = constraintSet.getConstraint(
-                R.id.notification_stack_scroller).layout;
-        assertThat(qsFrameLayout.endToEnd).isEqualTo(R.id.qs_edge_guideline);
-        assertThat(stackScrollerLayout.startToStart).isEqualTo(R.id.qs_edge_guideline);
+        assertThat(getConstraintSetLayout(R.id.qs_frame).endToEnd)
+                .isEqualTo(R.id.qs_edge_guideline);
+        assertThat(getConstraintSetLayout(R.id.notification_stack_scroller).startToStart)
+                .isEqualTo(R.id.qs_edge_guideline);
+    }
+
+    @Test
+    public void testSinglePaneShadeLayout_childrenHaveConstantWidth() {
+        when(mFeatureFlags.isTwoColumnNotificationShadeEnabled()).thenReturn(false);
+
+        mNotificationPanelViewController.updateResources();
+
+        assertThat(getConstraintSetLayout(R.id.qs_frame).mWidth)
+                .isEqualTo(mResources.getDimensionPixelSize(R.dimen.qs_panel_width));
+        assertThat(getConstraintSetLayout(R.id.notification_stack_scroller).mWidth)
+                .isEqualTo(mResources.getDimensionPixelSize(R.dimen.notification_panel_width));
+    }
+
+    @Test
+    public void testSplitShadeLayout_childrenHaveZeroWidth() {
+        enableSplitShade();
+
+        mNotificationPanelViewController.updateResources();
+
+        assertThat(getConstraintSetLayout(R.id.qs_frame).mWidth).isEqualTo(0);
+        assertThat(getConstraintSetLayout(R.id.notification_stack_scroller).mWidth).isEqualTo(0);
+    }
+
+    @Test
+    public void testOnDragDownEvent_horizontalTranslationIsZeroForSplitShade() {
+        when(mNotificationStackScrollLayoutController.getWidth()).thenReturn(350f);
+        when(mView.getWidth()).thenReturn(800);
+        enableSplitShade();
+
+        onTouchEvent(MotionEvent.obtain(0L, 0L, MotionEvent.ACTION_DOWN,
+                200f /* x position */, 0f, 0));
+
+        verify(mQsFrame).setTranslationX(0);
     }
 
     @Test
@@ -538,19 +561,13 @@ public class NotificationPanelViewTest extends SysuiTestCase {
         return view;
     }
 
-    @Test
-    public void testOnDragDownEvent_horizontalTranslationIsZeroForDualPaneShade() {
-        when(mNotificationStackScrollLayoutController.getWidth()).thenReturn(350f);
-        when(mView.getWidth()).thenReturn(800);
-        enableDualPaneShade();
-
-        onTouchEvent(MotionEvent.obtain(0L, 0L, MotionEvent.ACTION_DOWN,
-                200f /* x position */, 0f, 0));
-
-        verify(mQsFrame).setTranslationX(0);
+    private ConstraintSet.Layout getConstraintSetLayout(@IdRes int id) {
+        ConstraintSet constraintSet = new ConstraintSet();
+        constraintSet.clone(mNotificationContainerParent);
+        return constraintSet.getConstraint(id).layout;
     }
 
-    private void enableDualPaneShade() {
+    private void enableSplitShade() {
         when(mResources.getBoolean(R.bool.config_use_split_notification_shade)).thenReturn(true);
         when(mFeatureFlags.isTwoColumnNotificationShadeEnabled()).thenReturn(true);
     }