diff --git a/metadata/metadata_test.go b/metadata/metadata_test.go
index 9a3ae8a1..eca9673c 100644
--- a/metadata/metadata_test.go
+++ b/metadata/metadata_test.go
@@ -42,7 +42,7 @@ func TestMetadataDelete(t *testing.T) {
 func TestMetadataCopy(t *testing.T) {
 	md := Metadata{
 		"Foo": "bar",
-		"bar": "baz",
+		"Bar": "baz",
 	}
 
 	cp := Copy(md)