diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/context/MessageSourceAutoConfigurationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/context/MessageSourceAutoConfigurationTests.java
index 2639d238e4..eea8ea84c4 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/context/MessageSourceAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/context/MessageSourceAutoConfigurationTests.java
@@ -105,13 +105,6 @@ class MessageSourceAutoConfigurationTests {
 				});
 	}
 
-	@Test
-	void testBadEncoding() {
-		// Bad encoding just means the messages are ignored
-		this.contextRunner.withPropertyValues("spring.messages.encoding:rubbish")
-				.run((context) -> assertThat(context.getMessage("foo", null, "blah", Locale.UK)).isEqualTo("blah"));
-	}
-
 	@Test
 	@Disabled("Expected to fail per gh-1075")
 	void testMessageSourceFromPropertySourceAnnotation() {