--- a/rust/hg-core/Cargo.toml	Wed Jan 22 03:17:06 2020 +0530
+++ b/rust/hg-core/Cargo.toml	Wed Feb 05 17:05:37 2020 +0100
@@ -18,3 +18,6 @@
 rayon = "1.3.0"
 regex = "1.1.0"
 twox-hash = "1.5.0"
+
+[dev-dependencies]
+tempfile = "3.1.0"
\ No newline at end of file