1 files changed, 5 insertions, 0 deletions
diff --git a/src/libcoretest/num/mod.rs b/src/libcoretest/num/mod.rs
index 2c6efc0040f..03f6e51a349 100644
--- a/src/libcoretest/num/mod.rs
+++ b/src/libcoretest/num/mod.rs
@@ -122,4 +122,9 @@ mod test {
         assert_eq!("-9223372036854775808".parse::<i64>().ok(), Some(i64_val));
         assert_eq!("-9223372036854775809".parse::<i64>().ok(), None);
     }
+
+    #[test]
+    fn test_int_from_minus_sign() {
+        assert_eq!("-".parse::<i32>().ok(), None);
+    }
 }