diff --git a/src/test/java/com/github/underscore/LodashTest.java b/src/test/java/com/github/underscore/LodashTest.java
index b51fc6f1..6a11e52b 100644
--- a/src/test/java/com/github/underscore/LodashTest.java
+++ b/src/test/java/com/github/underscore/LodashTest.java
@@ -1295,6 +1295,10 @@ void formatXml() {
                                 + "<element>2</element></root>"));
         assertEquals(
                 "<a>\n  <b></b>\n  <b></b>\n</a>", U.formatXml("<a>\n  <b></b>\n  <b></b>\n</a>"));
+        assertEquals(
+                "<a>\n   <b></b>\n   <b></b>\n</a>",
+                U.formatXml(
+                        "<a>\n  <b></b>\n  <b></b>\n</a>", Xml.XmlStringBuilder.Step.THREE_SPACES));
         assertEquals(
                 "<a>\n    <b></b>\n    <b></b>\n</a>",
                 U.formatXml(