diff --git a/spring-core/src/test/java/org/springframework/util/AssertTests.java b/spring-core/src/test/java/org/springframework/util/AssertTests.java
index 0dfe86f1dce..b3c5d433359 100644
--- a/spring-core/src/test/java/org/springframework/util/AssertTests.java
+++ b/spring-core/src/test/java/org/springframework/util/AssertTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,17 +35,22 @@ import org.junit.rules.ExpectedException;
  * @author Erwin Vervaet
  * @author Rick Evans
  * @author Arjen Poutsma
+ * @author Sam Brannen
  */
 public class AssertTests {
 
 	@Rule
 	public ExpectedException thrown = ExpectedException.none();
 
-	@Test(expected = IllegalArgumentException.class)
+
+	@Test
 	public void instanceOf() {
-		final Set<?> set = new HashSet<Object>();
-		Assert.isInstanceOf(HashSet.class, set);
-		Assert.isInstanceOf(HashMap.class, set);
+		Assert.isInstanceOf(HashSet.class, new HashSet<Object>());
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void instanceOfWithTypeMismatch() {
+		Assert.isInstanceOf(HashMap.class, new HashSet<Object>());
 	}
 
 	@Test