diff --git a/quickstep/src/com/android/launcher3/model/WellbeingModel.java b/quickstep/src/com/android/launcher3/model/WellbeingModel.java
index 94a1814..0f3aaa6 100644
--- a/quickstep/src/com/android/launcher3/model/WellbeingModel.java
+++ b/quickstep/src/com/android/launcher3/model/WellbeingModel.java
@@ -51,7 +51,6 @@
 import com.android.launcher3.popup.SystemShortcut;
 import com.android.launcher3.util.DaggerSingletonObject;
 import com.android.launcher3.util.DaggerSingletonTracker;
-import com.android.launcher3.util.ExecutorUtil;
 import com.android.launcher3.util.Executors;
 import com.android.launcher3.util.Preconditions;
 import com.android.launcher3.util.SafeCloseable;
@@ -122,7 +121,7 @@
             }
         };
         mWorkerHandler.post(this::initializeInBackground);
-        ExecutorUtil.executeSyncOnMainOrFail(() -> tracker.addCloseable(this));
+        tracker.addCloseable(this);
     }
 
     @WorkerThread
diff --git a/quickstep/src/com/android/quickstep/util/AsyncClockEventDelegate.java b/quickstep/src/com/android/quickstep/util/AsyncClockEventDelegate.java
index 4a84b1b..54f6443 100644
--- a/quickstep/src/com/android/quickstep/util/AsyncClockEventDelegate.java
+++ b/quickstep/src/com/android/quickstep/util/AsyncClockEventDelegate.java
@@ -34,11 +34,8 @@
 
 import com.android.launcher3.dagger.ApplicationContext;
 import com.android.launcher3.dagger.LauncherAppSingleton;
-import com.android.launcher3.dagger.LauncherBaseAppComponent;
 import com.android.launcher3.util.DaggerSingletonObject;
 import com.android.launcher3.util.DaggerSingletonTracker;
-import com.android.launcher3.util.ExecutorUtil;
-import com.android.launcher3.util.MainThreadInitializedObject;
 import com.android.launcher3.util.SafeCloseable;
 import com.android.launcher3.util.SettingsCache;
 import com.android.launcher3.util.SettingsCache.OnChangeListener;
@@ -61,6 +58,7 @@
             new DaggerSingletonObject<>(QuickstepBaseAppComponent::getAsyncClockEventDelegate);
 
     private final Context mContext;
+    private final SettingsCache mSettingsCache;
     private final SimpleBroadcastReceiver mReceiver =
             new SimpleBroadcastReceiver(UI_HELPER_EXECUTOR, this::onClockEventReceived);
 
@@ -72,11 +70,14 @@
     private boolean mDestroyed = false;
 
     @Inject
-    AsyncClockEventDelegate(@ApplicationContext Context context, DaggerSingletonTracker tracker) {
+    AsyncClockEventDelegate(@ApplicationContext Context context,
+            DaggerSingletonTracker tracker,
+            SettingsCache settingsCache) {
         super(context);
         mContext = context;
+        mSettingsCache = settingsCache;
         mReceiver.register(mContext, ACTION_TIME_CHANGED, ACTION_TIMEZONE_CHANGED);
-        ExecutorUtil.executeSyncOnMainOrFail(() -> tracker.addCloseable(this));
+        tracker.addCloseable(this);
     }
 
     @Override
@@ -100,7 +101,7 @@
         }
         synchronized (mFormatObservers) {
             if (!mFormatRegistered && !mDestroyed) {
-                SettingsCache.INSTANCE.get(mContext).register(mFormatUri, this);
+                mSettingsCache.register(mFormatUri, this);
                 mFormatRegistered = true;
             }
             mFormatObservers.add(observer);
@@ -136,7 +137,7 @@
     @Override
     public void close() {
         mDestroyed = true;
-        SettingsCache.INSTANCE.get(mContext).unregister(mFormatUri, this);
+        mSettingsCache.unregister(mFormatUri, this);
         mReceiver.unregisterReceiverSafely(mContext);
     }
 }
diff --git a/src/com/android/launcher3/util/DaggerSingletonTracker.java b/src/com/android/launcher3/util/DaggerSingletonTracker.java
index 2946da1..b7a88db 100644
--- a/src/com/android/launcher3/util/DaggerSingletonTracker.java
+++ b/src/com/android/launcher3/util/DaggerSingletonTracker.java
@@ -16,6 +16,8 @@
 
 package com.android.launcher3.util;
 
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
+
 import com.android.launcher3.dagger.LauncherAppSingleton;
 
 import java.util.ArrayList;
@@ -31,7 +33,9 @@
 @LauncherAppSingleton
 public class DaggerSingletonTracker implements SafeCloseable {
 
-    private final ArrayList<SafeCloseable> mLauncherAppSingletons = new ArrayList<>();
+    private final ArrayList<SafeCloseable> mCloseables = new ArrayList<>();
+
+    private boolean mClosed = false;
 
     @Inject
     DaggerSingletonTracker() {
@@ -44,14 +48,21 @@
      * {@link MainThreadInitializedObject.SandboxContext#onDestroy()}
      */
     public void addCloseable(SafeCloseable closeable) {
-        mLauncherAppSingletons.add(closeable);
+        MAIN_EXECUTOR.execute(() -> {
+            if (mClosed) {
+                closeable.close();
+            } else {
+                mCloseables.add(closeable);
+            }
+        });
     }
 
     @Override
     public void close() {
+        mClosed = true;
         // Destroy in reverse order
-        for (int i = mLauncherAppSingletons.size() - 1; i >= 0; i--) {
-            mLauncherAppSingletons.get(i).close();
+        for (int i = mCloseables.size() - 1; i >= 0; i--) {
+            mCloseables.get(i).close();
         }
     }
 }
diff --git a/src/com/android/launcher3/util/ExecutorUtil.java b/src/com/android/launcher3/util/ExecutorUtil.java
deleted file mode 100644
index efc0eec..0000000
--- a/src/com/android/launcher3/util/ExecutorUtil.java
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * Copyright (C) 2024 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.launcher3.util;
-
-import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
-
-import android.os.Looper;
-
-import java.util.concurrent.ExecutionException;
-
-public final class ExecutorUtil {
-
-    /**
-     * Executes runnable on {@link Looper#getMainLooper()}, otherwise fails with an exception.
-     */
-    public static void executeSyncOnMainOrFail(Runnable runnable) {
-        try {
-            MAIN_EXECUTOR.submit(runnable).get();
-        } catch (InterruptedException | ExecutionException e) {
-            throw new RuntimeException(e);
-        }
-    }
-}
diff --git a/src/com/android/launcher3/util/ScreenOnTracker.java b/src/com/android/launcher3/util/ScreenOnTracker.java
index 3582ad8..50be98b 100644
--- a/src/com/android/launcher3/util/ScreenOnTracker.java
+++ b/src/com/android/launcher3/util/ScreenOnTracker.java
@@ -68,7 +68,7 @@
     private void init(DaggerSingletonTracker tracker) {
         mIsScreenOn = true;
         mReceiver.register(mContext, ACTION_SCREEN_ON, ACTION_SCREEN_OFF, ACTION_USER_PRESENT);
-        ExecutorUtil.executeSyncOnMainOrFail(() -> tracker.addCloseable(this));
+        tracker.addCloseable(this);
     }
 
     @Override
diff --git a/src/com/android/launcher3/util/SettingsCache.java b/src/com/android/launcher3/util/SettingsCache.java
index a1ed499..29d5032 100644
--- a/src/com/android/launcher3/util/SettingsCache.java
+++ b/src/com/android/launcher3/util/SettingsCache.java
@@ -94,7 +94,7 @@
     SettingsCache(@ApplicationContext Context context, DaggerSingletonTracker tracker) {
         super(new Handler(Looper.getMainLooper()));
         mResolver = context.getContentResolver();
-        ExecutorUtil.executeSyncOnMainOrFail(() -> tracker.addCloseable(this));
+        tracker.addCloseable(this);
     }
 
     @Override
diff --git a/src/com/android/launcher3/widget/custom/CustomWidgetManager.java b/src/com/android/launcher3/widget/custom/CustomWidgetManager.java
index 4aeac76..9dddc18 100644
--- a/src/com/android/launcher3/widget/custom/CustomWidgetManager.java
+++ b/src/com/android/launcher3/widget/custom/CustomWidgetManager.java
@@ -18,6 +18,7 @@
 
 import static com.android.launcher3.Flags.enableSmartspaceAsAWidget;
 import static com.android.launcher3.model.data.LauncherAppWidgetInfo.CUSTOM_WIDGET_ID;
+import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 import static com.android.launcher3.widget.LauncherAppWidgetProviderInfo.CLS_CUSTOM_WIDGET_PREFIX;
 
 import android.appwidget.AppWidgetManager;
@@ -38,7 +39,6 @@
 import com.android.launcher3.dagger.LauncherBaseAppComponent;
 import com.android.launcher3.util.DaggerSingletonObject;
 import com.android.launcher3.util.DaggerSingletonTracker;
-import com.android.launcher3.util.ExecutorUtil;
 import com.android.launcher3.util.PackageUserKey;
 import com.android.launcher3.util.PluginManagerWrapper;
 import com.android.launcher3.widget.LauncherAppWidgetHostView;
@@ -90,27 +90,23 @@
         mCustomWidgets = new ArrayList<>();
 
         pluginManager.addPluginListener(this, CustomWidgetPlugin.class, true);
-
-        ExecutorUtil.executeSyncOnMainOrFail(() -> {
-            if (enableSmartspaceAsAWidget()) {
-                for (String s: context.getResources()
-                        .getStringArray(R.array.custom_widget_providers)) {
-                    try {
-                        Class<?> cls = Class.forName(s);
-                        CustomWidgetPlugin plugin = (CustomWidgetPlugin)
-                                cls.getDeclaredConstructor(Context.class).newInstance(context);
-                        onPluginConnected(plugin, context);
-                    } catch (ClassNotFoundException | InstantiationException
-                             | IllegalAccessException
-                             | ClassCastException | NoSuchMethodException
-                             | InvocationTargetException e) {
-                        Log.e(TAG, "Exception found when trying to add custom widgets: " + e);
-                    }
+        if (enableSmartspaceAsAWidget()) {
+            for (String s: context.getResources()
+                    .getStringArray(R.array.custom_widget_providers)) {
+                try {
+                    Class<?> cls = Class.forName(s);
+                    CustomWidgetPlugin plugin = (CustomWidgetPlugin)
+                            cls.getDeclaredConstructor(Context.class).newInstance(context);
+                    MAIN_EXECUTOR.execute(() -> onPluginConnected(plugin, context));
+                } catch (ClassNotFoundException | InstantiationException
+                         | IllegalAccessException
+                         | ClassCastException | NoSuchMethodException
+                         | InvocationTargetException e) {
+                    Log.e(TAG, "Exception found when trying to add custom widgets: " + e);
                 }
             }
-
-            tracker.addCloseable(() -> pluginManager.removePluginListener(this));
-        });
+        }
+        tracker.addCloseable(() -> pluginManager.removePluginListener(this));
     }
 
     @Override
diff --git a/tests/Android.bp b/tests/Android.bp
index 9f62d02..9667277 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -98,6 +98,8 @@
         "com_android_launcher3_flags_lib",
         "com_android_wm_shell_flags_lib",
         "android.appwidget.flags-aconfig-java",
+        "platform-parametric-runner-lib",
+        "kotlin-reflect",
     ],
     manifest: "AndroidManifest-common.xml",
     platform_apis: true,
@@ -111,6 +113,9 @@
     asset_dirs: ["assets"],
     // TODO(b/319712088): re-enable use_resource_processor
     use_resource_processor: false,
+    static_libs: [
+        "kotlin-reflect",
+    ],
 }
 
 android_test {
@@ -193,10 +198,7 @@
     name: "Launcher3RoboTests",
     srcs: [
         ":launcher3-robo-src",
-
-        // Test util classes
         ":launcher-testing-helpers-robo",
-        ":launcher-testing-shared",
     ],
     exclude_srcs: [
         //"src/com/android/launcher3/util/CellContentDimensionsTest.kt", // Failing - b/316553889
diff --git a/tests/multivalentTests/src/com/android/launcher3/util/DaggerSingletonDeadlockTest.kt b/tests/multivalentTests/src/com/android/launcher3/util/DaggerSingletonDeadlockTest.kt
new file mode 100644
index 0000000..642c628
--- /dev/null
+++ b/tests/multivalentTests/src/com/android/launcher3/util/DaggerSingletonDeadlockTest.kt
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.util
+
+import androidx.test.filters.SmallTest
+import com.android.launcher3.dagger.LauncherAppComponent
+import com.android.launcher3.util.LauncherModelHelper.SandboxModelContext
+import java.util.concurrent.TimeUnit.SECONDS
+import kotlin.reflect.KFunction
+import kotlin.reflect.full.memberFunctions
+import org.junit.After
+import org.junit.Assert
+import org.junit.Test
+import org.junit.runner.RunWith
+import platform.test.runner.parameterized.ParameterizedAndroidJunit4
+import platform.test.runner.parameterized.Parameters
+
+@SmallTest
+@RunWith(ParameterizedAndroidJunit4::class)
+class DaggerSingletonDeadlockTest(val method: KFunction<*>, val methodName: String) {
+
+    private val context = SandboxModelContext()
+
+    @After
+    fun tearDown() {
+        context.onDestroy()
+    }
+
+    /** Test to verify that the object can be created successfully on the main thread. */
+    @Test
+    fun objectCreationOnMainThread() {
+        Executors.MAIN_EXECUTOR.submit {
+                method.call(context.appComponent).also(Assert::assertNotNull)
+            }
+            .get(10, SECONDS)
+    }
+
+    /**
+     * Test to verify that the object can be created successfully on the background thread, when the
+     * main thread is blocked.
+     */
+    @Test
+    fun objectCreationOnBackgroundThread() {
+        TestUtil.runOnExecutorSync(Executors.MAIN_EXECUTOR) {
+            Executors.THREAD_POOL_EXECUTOR.submit {
+                    method.call(context.appComponent).also(Assert::assertNotNull)
+                }
+                .get(10, SECONDS)
+        }
+    }
+
+    companion object {
+        @Parameters(name = "{1}")
+        @JvmStatic
+        fun getTestMethods() =
+            LauncherAppComponent::class
+                .memberFunctions
+                .filter { it.parameters.size == 1 }
+                .map {
+                    arrayOf(it, if (it.name.startsWith("get")) it.name.substring(3) else it.name)
+                }
+    }
+}