diff --git a/packages/backend-rs/src/misc/get_image_size.rs b/packages/backend-rs/src/misc/get_image_size.rs
index 4cab76b8ad..9b3e20171c 100644
--- a/packages/backend-rs/src/misc/get_image_size.rs
+++ b/packages/backend-rs/src/misc/get_image_size.rs
@@ -123,8 +123,7 @@ mod unit_test {
         let gif_url = "https://firefish.dev/firefish/firefish/-/raw/b9c3dfbd3d473cb2cee20c467eeae780bc401271/packages/backend/test/resources/anime.gif";
         let mp3_url = "https://firefish.dev/firefish/firefish/-/blob/5891a90f71a8b9d5ea99c683ade7e485c685d642/packages/backend/assets/sounds/aisha/1.mp3";
 
-        // Delete caches in case you run this test multiple times
-        #[cfg(not(feature = "ci"))]
+        // delete caches in case you run this test multiple times
         cache::delete_all(cache::Category::FetchUrl).unwrap();
 
         let png_size_1 = ImageSize {
@@ -188,4 +187,15 @@ mod unit_test {
         assert_eq!(gif_size, get_image_size_from_url(gif_url).await.unwrap());
         assert!(get_image_size_from_url(mp3_url).await.is_err());
     }
+
+    #[tokio::test]
+    async fn too_many_attempts() {
+        let url = "https://firefish.dev/firefish/firefish/-/raw/5891a90f71a8b9d5ea99c683ade7e485c685d642/packages/backend/assets/splash.png";
+
+        // delete caches in case you run this test multiple times
+        cache::delete_one(cache::Category::FetchUrl, url).unwrap();
+
+        assert!(get_image_size_from_url(url).await.is_ok());
+        assert!(get_image_size_from_url(url).await.is_err());
+    }
 }
diff --git a/packages/backend-rs/src/misc/latest_version.rs b/packages/backend-rs/src/misc/latest_version.rs
index 13945fcdda..2b56f31055 100644
--- a/packages/backend-rs/src/misc/latest_version.rs
+++ b/packages/backend-rs/src/misc/latest_version.rs
@@ -75,11 +75,17 @@ mod unit_test {
         // DD
         assert!(&version[6..8] >= "01");
         assert!(&version[6..8] <= "31");
+
+        // -X
+        if version.len() > 8 {
+            assert!(version.chars().nth(8).unwrap() == '-');
+            assert!(version[9..].chars().all(|c| c.is_ascii_digit()));
+        }
     }
 
     #[tokio::test]
     async fn check_version() {
-        #[cfg(not(feature = "ci"))]
+        // delete caches in case you run this test multiple times
         cache::delete_one(cache::Category::FetchUrl, UPSTREAM_PACKAGE_JSON_URL).unwrap();
 
         // fetch from firefish.dev