diff --git a/packages/tracker-client/src/http/mod.rs b/packages/tracker-client/src/http/mod.rs
index 15723c1b..d8f8242e 100644
--- a/packages/tracker-client/src/http/mod.rs
+++ b/packages/tracker-client/src/http/mod.rs
@@ -24,3 +24,19 @@ impl InfoHash {
         self.0
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::http::percent_encode_byte_array;
+
+    #[test]
+    fn it_should_encode_a_20_byte_array() {
+        assert_eq!(
+            percent_encode_byte_array(&[
+                0x3b, 0x24, 0x55, 0x04, 0xcf, 0x5f, 0x11, 0xbb, 0xdb, 0xe1, 0x20, 0x1c, 0xea, 0x6a, 0x6b, 0xf4, 0x5a, 0xee, 0x1b,
+                0xc0,
+            ]),
+            "%3B%24U%04%CF%5F%11%BB%DB%E1%20%1C%EAjk%F4Z%EE%1B%C0"
+        );
+    }
+}