diff --git a/Cargo.toml b/Cargo.toml
index c056abc..bf253d3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -45,6 +45,7 @@ builtin_interfaces = { version = "*", optional = true }
 [dev-dependencies]
 rand = "0.8"
 criterion = { version = "0.5", features = ["html_reports"] }
+pretty_assertions = "1.0"
 
 [features]
 rclrs_msg = ["dep:sensor_msgs", "dep:std_msgs", "dep:builtin_interfaces"]