diff --git a/src/test/java/org/apache/commons/lang3/CharSetUtilsTest.java b/src/test/java/org/apache/commons/lang3/CharSetUtilsTest.java
index 0d646d9c1dd..ef2be8f4d2c 100644
--- a/src/test/java/org/apache/commons/lang3/CharSetUtilsTest.java
+++ b/src/test/java/org/apache/commons/lang3/CharSetUtilsTest.java
@@ -156,7 +156,6 @@ void testDelete_StringStringarray() {
         assertEquals("ho", CharSetUtils.delete("hello", "el"));
         assertEquals("", CharSetUtils.delete("hello", "elho"));
         assertEquals("hello", CharSetUtils.delete("hello", ""));
-        assertEquals("hello", CharSetUtils.delete("hello", ""));
         assertEquals("", CharSetUtils.delete("hello", "a-z"));
         assertEquals("", CharSetUtils.delete("----", "-"));
         assertEquals("heo", CharSetUtils.delete("hello", "l"));