diff --git a/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/SpringDecoderTests.java b/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/SpringDecoderTests.java
index cb131a3b..51e4a458 100644
--- a/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/SpringDecoderTests.java
+++ b/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/SpringDecoderTests.java
@@ -133,7 +133,7 @@ public class SpringDecoderTests extends FeignClientFactoryBean {
 	public void testResponseEntityVoid() {
 		ResponseEntity<Void> response = testClient().getHelloVoid();
 		assertThat(response).as("response was null").isNotNull();
-		List<String> headerVals = response.getHeaders().get("X-test-header");
+		List<String> headerVals = response.getHeaders().get("x-test-header");
 		assertThat(headerVals).as("headerVals was null").isNotNull();
 		assertThat(headerVals.size()).as("headerVals size was wrong").isEqualTo(1);
 		String header = headerVals.get(0);
diff --git a/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/valid/FeignHttpClientTests.java b/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/valid/FeignHttpClientTests.java
index 07262ed2..55c2a7a3 100644
--- a/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/valid/FeignHttpClientTests.java
+++ b/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/valid/FeignHttpClientTests.java
@@ -86,7 +86,7 @@ public class FeignHttpClientTests {
 	public void testPatch() {
 		ResponseEntity<Void> response = this.testClient.patchHello(new Hello("foo"));
 		assertThat(response).isNotNull();
-		String header = response.getHeaders().getFirst("X-Hello");
+		String header = response.getHeaders().getFirst("x-hello");
 		assertThat(header).isEqualTo("hello world patch");
 	}
 
diff --git a/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/valid/FeignOkHttpTests.java b/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/valid/FeignOkHttpTests.java
index 5b4cf24b..0ebeb19f 100644
--- a/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/valid/FeignOkHttpTests.java
+++ b/spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/valid/FeignOkHttpTests.java
@@ -88,7 +88,7 @@ public class FeignOkHttpTests {
 	public void testPatch() {
 		ResponseEntity<Void> response = this.testClient.patchHello(new Hello("foo"));
 		assertThat(response).isNotNull();
-		String header = response.getHeaders().getFirst("X-Hello");
+		String header = response.getHeaders().getFirst("x-hello");
 		assertThat(header).isEqualTo("hello world patch");
 	}