diff --git a/tests/error_types_test/Cargo.toml b/tests/error_types_test/Cargo.toml
index 8048dd10..2403d2a0 100644
--- a/tests/error_types_test/Cargo.toml
+++ b/tests/error_types_test/Cargo.toml
@@ -8,3 +8,4 @@ edition = "2021"
 
 [dependencies]
 error_types = { path = "../../solutions/error_types"}
+chrono = "0.4.41"
diff --git a/tests/error_types_test/src/lib.rs b/tests/error_types_test/src/lib.rs
index b9329aea..61ad2b6e 100644
--- a/tests/error_types_test/src/lib.rs
+++ b/tests/error_types_test/src/lib.rs
@@ -1,5 +1,5 @@
 use error_types::*;
-
+use chrono::*;
 #[test]
 fn test_error_type() {
     let cases = [