diff --git a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/convert/DelimitedStringToCollectionConverterTests.java b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/convert/DelimitedStringToCollectionConverterTests.java
index 097bee0aaa..9a4b5ddd83 100644
--- a/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/convert/DelimitedStringToCollectionConverterTests.java
+++ b/spring-boot-project/spring-boot/src/test/java/org/springframework/boot/convert/DelimitedStringToCollectionConverterTests.java
@@ -126,12 +126,14 @@ public class DelimitedStringToCollectionConverterTests {
 		assertThat(converted).containsExactly("a,b,c");
 	}
 
+	@SuppressWarnings("unchecked")
 	@Test
 	public void convertWhenHasCollectionObjectTypeShouldUseCollectionObjectType() {
 		TypeDescriptor sourceType = TypeDescriptor.valueOf(String.class);
 		TypeDescriptor targetType = TypeDescriptor
 				.nested(ReflectionUtils.findField(Values.class, "specificType"), 0);
-		MyCustomList<String> converted = (MyCustomList<String>) this.conversionService.convert("a*b", sourceType, targetType);
+		MyCustomList<String> converted = (MyCustomList<String>) this.conversionService
+				.convert("a*b", sourceType, targetType);
 		assertThat(converted).containsExactly("a", "b");
 	}