diff --git a/Cargo.toml b/Cargo.toml
index f77f2d8..4cb9855 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,3 +32,4 @@ gpgme = "0.11"
 [dev-dependencies]
 test-log = "0.2.19"
 serial_test = "3.3.1"
+tempfile = "3.10.1"