diff --git a/src/shared.rs b/src/shared.rs
index 6fbad8a1f0d..a40ecd24d2a 100644
--- a/src/shared.rs
+++ b/src/shared.rs
@@ -441,7 +441,7 @@ pub use self::clap::{
 
 #[cfg(test)]
 mod value_parser_tests {
-    use super::{AsRange, ParseRenameFraction};
+    use super::{AsRange, AsTime, ParseRenameFraction};
     use clap::Parser;
 
     #[test]
@@ -479,4 +479,16 @@ mod value_parser_tests {
         let c = Cmd::parse_from(["cmd", "-l=1,10"]);
         assert_eq!(c.arg, Some(1..10));
     }
+
+    #[test]
+    fn since() {
+        #[derive(Debug, clap::Parser)]
+        pub struct Cmd {
+            #[clap(long, long="since", value_parser = AsTime)]
+            pub arg: Option<gix::date::Time>,
+        }
+
+        let c = Cmd::parse_from(["cmd", "--since", "2 weeks ago"]);
+        assert!(matches!(c.arg, Some(gix::date::Time { .. })));
+    }
 }