diff --git a/tests/testables/src/android/testing/TestableResources.java b/tests/testables/src/android/testing/TestableResources.java
index c60f07d56d92a..27d5b66b355e6 100644
--- a/tests/testables/src/android/testing/TestableResources.java
+++ b/tests/testables/src/android/testing/TestableResources.java
@@ -59,7 +59,8 @@ public class TestableResources {
      * Since resource ids are unique there is a single addOverride that will override the value
      * whenever it is gotten regardless of which method is used (i.e. getColor or getDrawable).
      * </p>
-     * @param id The resource id to be overridden
+     *
+     * @param id    The resource id to be overridden
      * @param value The value of the resource, null to cause a {@link Resources.NotFoundException}
      *              when gotten.
      */
@@ -74,28 +75,33 @@ public class TestableResources {
      * cause a {@link Resources.NotFoundException} whereas removing the override will actually
      * switch back to returning the default/real value of the resource.
      * </p>
-     * @param id
      */
     public void removeOverride(int id) {
         mOverrides.remove(id);
     }
 
     private Object answer(InvocationOnMock invocationOnMock) throws Throwable {
-        try {
-            int id = invocationOnMock.getArgument(0);
-            int index = mOverrides.indexOfKey(id);
-            if (index >= 0) {
-                Object value = mOverrides.valueAt(index);
-                if (value == null) throw new Resources.NotFoundException();
-                return value;
+        // Only try to override methods with an integer first argument
+        if (invocationOnMock.getArguments().length > 0) {
+            Object argument = invocationOnMock.getArgument(0);
+            if (argument instanceof Integer) {
+                try {
+                    int id = (Integer)argument;
+                    int index = mOverrides.indexOfKey(id);
+                    if (index >= 0) {
+                        Object value = mOverrides.valueAt(index);
+                        if (value == null) throw new Resources.NotFoundException();
+                        return value;
+                    }
+                } catch (Resources.NotFoundException e) {
+                    // Let through NotFoundException.
+                    throw e;
+                } catch (Throwable t) {
+                    // Generic catching for the many things that can go wrong, fall back to
+                    // the real implementation.
+                    Log.i(TAG, "Falling back to default resources call " + t);
+                }
             }
-        } catch (Resources.NotFoundException e) {
-            // Let through NotFoundException.
-            throw e;
-        } catch (Throwable t) {
-            // Generic catching for the many things that can go wrong, fall back to
-            // the real implementation.
-            Log.i(TAG, "Falling back to default resources call " + t);
         }
         return invocationOnMock.callRealMethod();
     }