diff --git a/fmt/tests/content/two_headers.rs b/fmt/tests/content/two_headers.rs
new file mode 100644
index 0000000..e08923e
--- /dev/null
+++ b/fmt/tests/content/two_headers.rs
@@ -0,0 +1,32 @@
+// Copyright 2023 Greptime Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// This file also contains some code from prometheus project.
+// Copyright 2015 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! Implementations of `rate`, `increase` and `delta` functions in PromQL.
+
+use std::fmt::Display;
+use std::sync::Arc;
diff --git a/fmt/tests/tests.rs b/fmt/tests/tests.rs
index 737698e..ee2e9c7 100644
--- a/fmt/tests/tests.rs
+++ b/fmt/tests/tests.rs
@@ -14,10 +14,7 @@
 
 use std::path::Path;
 
-use hawkeye_fmt::header::{
-    model::default_headers,
-    parser::parse_header,
-};
+use hawkeye_fmt::header::{model::default_headers, parser::parse_header};
 
 #[test]
 fn test_remove_file_only_header() {
@@ -26,8 +23,21 @@ fn test_remove_file_only_header() {
     let def = defs.get("script_style").unwrap().clone();
     let keywords = vec!["copyright".to_string()];
 
-    let document = parse_header(&file, def, &keywords).unwrap();
+    let document = parse_header(file, def, &keywords).unwrap();
     let end_pos = document.end_pos.unwrap();
     let content = document.file_content.content();
     assert!(content[end_pos..].trim().is_empty());
 }
+
+#[test]
+fn test_two_headers_should_only_remove_the_first() {
+    let file = Path::new("tests/content/two_headers.rs");
+    let defs = default_headers().unwrap();
+    let def = defs.get("doubleslash_style").unwrap().clone();
+    let keywords = vec!["copyright".to_string()];
+
+    let document = parse_header(file, def, &keywords).unwrap();
+    let end_pos = document.end_pos.unwrap();
+    let content = document.file_content.content();
+    assert!(content[end_pos..].contains("Copyright 2015 The Prometheus Authors"));
+}
diff --git a/licenserc.toml b/licenserc.toml
index 7969989..36e579b 100644
--- a/licenserc.toml
+++ b/licenserc.toml
@@ -16,6 +16,7 @@ headerPath = "Apache-2.0.txt"
 
 excludes = [
     "*.txt",
+    "**/tests/content/**",
 ]
 
 [properties]