diff --git a/tools/aconfig/src/codegen_java.rs b/tools/aconfig/src/codegen_java.rs
index 1c1cf77..dfd6766 100644
--- a/tools/aconfig/src/codegen_java.rs
+++ b/tools/aconfig/src/codegen_java.rs
@@ -135,8 +135,11 @@
         let file = generate_java_code(&cache).unwrap();
         assert_eq!("com/example/Flags.java", file.path.to_str().unwrap());
         assert_eq!(
-            expect_content.replace(' ', ""),
-            String::from_utf8(file.contents).unwrap().replace(' ', "")
+            None,
+            crate::test::first_significant_code_diff(
+                expect_content,
+                &String::from_utf8(file.contents).unwrap()
+            )
         );
     }
 }