diff --git a/src/lib/tests/mod.rs b/src/lib/tests/mod.rs
index 5e233c0..587408f 100644
--- a/src/lib/tests/mod.rs
+++ b/src/lib/tests/mod.rs
@@ -1,7 +1,7 @@
 /// Equivalent to assert_eq! but with prettier output
 pub fn test_eq(actual: &str, expected: &str) {
     if actual != expected {
-        panic!(format!("\nexpected:\n{}\nactual:\n{}\n", expected, actual));
+        panic!(format!("\nexpected:\n{:?}\nactual:\n{:?}\n", expected, actual));
     }
 }