diff --git a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/DbgUtils.java b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/DbgUtils.java
index e1b6f86c1..67d237f6a 100644
--- a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/DbgUtils.java
+++ b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/DbgUtils.java
@@ -101,7 +101,12 @@ public class DbgUtils {
 
     public static void assertOnUIThread()
     {
-        Assert.assertTrue( Utils.isOnUIThread() );
+        assertOnUIThread( true );
+    }
+
+    public static void assertOnUIThread( boolean isOnThread )
+    {
+        Assert.assertTrue( isOnThread == Utils.isOnUIThread() );
     }
 
     public static void printStack( String tag, StackTraceElement[] trace )