diff --git a/tests/zwus.rs b/tests/zwus.rs
index 65509eb..a5ad000 100644
--- a/tests/zwus.rs
+++ b/tests/zwus.rs
@@ -37,7 +37,7 @@ fn npm_vectors_decode_to_test123_checkmark() {
     // Keep these as raw strings to preserve invisible chars exactly.
     let npm_base_3 = r#"​᠎᠎​᠎­​᠎‍᠎‍­​​᠎‍​­​​᠎‍‍­​‍​​­​‍​‍­​‍‍᠎­​᠎‍᠎­​​​‍᠎᠎‍‍‍"#;
     let npm_base_6 = r#"­­‍‌­​‎‌⁠‏‏‌⁠‏­‌‏­‏‌‏­­‌‏­⁠‌‎⁠‌‏‏​‏­‎"#;
-    let npm_base_8 = r#""#;
+    let npm_base_8 = r#"‏­​‌‏​‎‌‏᠎⁠‌‏᠎​‌᠎‏‌᠎­‌᠎⁠‌​‏‌­⁠​‍‎"#;
 
     let expected = "Test123!✅";