diff --git a/tokenizers/src/normalizers/byte_level.rs b/tokenizers/src/normalizers/byte_level.rs
index 9d52f7eaa..edc32bfa8 100644
--- a/tokenizers/src/normalizers/byte_level.rs
+++ b/tokenizers/src/normalizers/byte_level.rs
@@ -1,6 +1,5 @@
 use crate::processors::byte_level::bytes_char;
 use crate::tokenizer::{NormalizedString, Normalizer, Result};
-use serde::{Deserialize, Serialize};
 use std::collections::{HashMap, HashSet};
 use crate::utils::macro_rules_attribute;
 
diff --git a/tokenizers/src/normalizers/mod.rs b/tokenizers/src/normalizers/mod.rs
index 43f50bfda..9dd549a63 100644
--- a/tokenizers/src/normalizers/mod.rs
+++ b/tokenizers/src/normalizers/mod.rs
@@ -88,12 +88,14 @@ mod tests {
 
             let json =
                 r#"{"sep":["</s>",2], "cls":["<s>",0], "trim_offsets":true, "add_prefix_space":true}"#;
-            let reconstructed = serde_json::from_str::<NormalizerWrapper>(json).unwrap();
-            println!("{:?}", reconstructed);
-            assert!(matches!(
-                reconstructed,
-                NormalizerWrapper::Sequence(_)
-            ));
+            let reconstructed = serde_json::from_str::<NormalizerWrapper>(json);
+            match reconstructed {
+                Err(err) => assert_eq!(
+                    err.to_string(),
+                    "data did not match any variant of untagged enum NormalizerWrapper"
+                ),
+                _ => panic!("Expected an error here"),
+            }
 
             let json = r#"{"type":"RobertaProcessing", "sep":["</s>",2] }"#;
             let reconstructed = serde_json::from_str::<NormalizerWrapper>(json);