diff --git a/tests/testables/src/android/testing/TestableResources.java b/tests/testables/src/android/testing/TestableResources.java
index 27d5b66b355e6..0ec106e329f62 100644
--- a/tests/testables/src/android/testing/TestableResources.java
+++ b/tests/testables/src/android/testing/TestableResources.java
@@ -15,9 +15,11 @@
 package android.testing;
 
 import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
 import static org.mockito.Mockito.withSettings;
 
 import android.content.Context;
+import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.util.Log;
 import android.util.SparseArray;
@@ -53,6 +55,16 @@ public class TestableResources {
         return mResources;
     }
 
+    /**
+     * Sets a configuration for {@link #getResources()} to return to allow custom configs to
+     * be set and tested.
+     *
+     * @param configuration the configuration to return from resources.
+     */
+    public void overrideConfiguration(Configuration configuration) {
+        when(mResources.getConfiguration()).thenReturn(configuration);
+    }
+
     /**
      * Sets the return value for the specified resource id.
      * <p>