diff --git a/rust/fizzbuzzo3/Cargo.toml b/rust/fizzbuzzo3/Cargo.toml
index 542e91a..e283e39 100644
--- a/rust/fizzbuzzo3/Cargo.toml
+++ b/rust/fizzbuzzo3/Cargo.toml
@@ -14,6 +14,6 @@ pyo3 = "0.27.2"
 rayon = "1.10.0"
 
 [dev-dependencies]
-pyo3-testing = "0.4.0"
+pyo3-testing = "0.28.0"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html