diff --git a/build.rs b/build.rs
index 9cf6510..bdc8fe9 100644
--- a/build.rs
+++ b/build.rs
@@ -5,6 +5,7 @@ use std::path::Path;
 
 fn main() -> std::io::Result<()> {
     println!("cargo:rerun-if-changed=src/parser/deimos.pest");
+    println!("cargo:rerun-if-changed=src/parser/tests");
     let out_dir = env::var("OUT_DIR").unwrap();
     let out_dir_path = Path::new(&out_dir);
     let parser_tests_dir = out_dir_path.join("src").join("parser").join("tests");