diff --git a/quickstep/tests/multivalentTests/src/com/android/quickstep/util/TestExtensions.kt b/quickstep/tests/multivalentTests/src/com/android/quickstep/util/TestExtensions.kt
new file mode 100644
index 0000000..6c526a4
--- /dev/null
+++ b/quickstep/tests/multivalentTests/src/com/android/quickstep/util/TestExtensions.kt
@@ -0,0 +1,65 @@
+/*
+ * 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.quickstep.util
+
+import com.android.launcher3.BuildConfig
+import com.android.launcher3.util.SafeCloseable
+import com.android.quickstep.DeviceConfigWrapper.Companion.configHelper
+import com.android.quickstep.util.DeviceConfigHelper.Companion.prefs
+import java.util.concurrent.CountDownLatch
+import java.util.function.BooleanSupplier
+import org.junit.Assert
+import org.junit.Assume
+
+/** Helper methods for testing */
+object TestExtensions {
+
+    @JvmStatic
+    fun overrideNavConfigFlag(
+        key: String,
+        value: Boolean,
+        targetValue: BooleanSupplier
+    ): AutoCloseable {
+        Assume.assumeTrue(BuildConfig.IS_DEBUG_DEVICE)
+        if (targetValue.asBoolean == value) {
+            return AutoCloseable {}
+        }
+
+        navConfigEditWatcher().let {
+            prefs.edit().putBoolean(key, value).commit()
+            it.close()
+        }
+        Assert.assertEquals(value, targetValue.asBoolean)
+
+        val watcher = navConfigEditWatcher()
+        return AutoCloseable {
+            prefs.edit().remove(key).commit()
+            watcher.close()
+        }
+    }
+
+    private fun navConfigEditWatcher(): SafeCloseable {
+        val wait = CountDownLatch(1)
+        val listener = Runnable { wait.countDown() }
+        configHelper.addChangeListener(listener)
+
+        return SafeCloseable {
+            wait.await()
+            configHelper.removeChangeListener(listener)
+        }
+    }
+}