diff --git a/src/frontend/src/handler/alter_source_with_sr.rs b/src/frontend/src/handler/alter_source_with_sr.rs
index 66d38f769337..472ce8772b99 100644
--- a/src/frontend/src/handler/alter_source_with_sr.rs
+++ b/src/frontend/src/handler/alter_source_with_sr.rs
@@ -382,6 +382,9 @@ pub mod tests {
                 .clone()
         };
 
+        let source = get_source();
+        expect_test::expect!["CREATE SOURCE src (id INT, country STRUCT<address CHARACTER VARYING, city STRUCT<address CHARACTER VARYING, zipcode CHARACTER VARYING>, zipcode CHARACTER VARYING>, zipcode BIGINT, rate REAL) WITH (connector = 'kafka', topic = 'test-topic', properties.bootstrap.server = 'localhost:29092') FORMAT PLAIN ENCODE PROTOBUF (message = '.test.TestRecord', schema.location = 'file://')"].assert_eq(&source.create_sql_purified().replace(proto_file.path().to_str().unwrap(), ""));
+
         let sql = format!(
             r#"ALTER SOURCE src FORMAT UPSERT ENCODE PROTOBUF (
                 message = '.test.TestRecord',
@@ -425,10 +428,6 @@ pub mod tests {
             .unwrap();
         assert_eq!(name_column.column_desc.data_type, DataType::Varchar);
 
-        let altered_sql = format!(
-            r#"CREATE SOURCE src WITH (connector = 'kafka', topic = 'test-topic', properties.bootstrap.server = 'localhost:29092') FORMAT PLAIN ENCODE PROTOBUF (message = '.test.TestRecordExt', schema.location = 'file://{}')"#,
-            proto_file.path().to_str().unwrap()
-        );
-        assert_eq!(altered_sql, altered_source.definition);
+        expect_test::expect!["CREATE SOURCE src (id INT, country STRUCT<address CHARACTER VARYING, city STRUCT<address CHARACTER VARYING, zipcode CHARACTER VARYING>, zipcode CHARACTER VARYING>, zipcode BIGINT, rate REAL, name CHARACTER VARYING) WITH (connector = 'kafka', topic = 'test-topic', properties.bootstrap.server = 'localhost:29092') FORMAT PLAIN ENCODE PROTOBUF (message = '.test.TestRecordExt', schema.location = 'file://')"].assert_eq(&altered_source.create_sql_purified().replace(proto_file.path().to_str().unwrap(), ""));
     }
 }