diff --git a/src/squall/internal/codegen.gleam b/src/squall/internal/codegen.gleam
index 6b28d8e..0ffb91f 100644
--- a/src/squall/internal/codegen.gleam
+++ b/src/squall/internal/codegen.gleam
@@ -1410,7 +1410,11 @@ fn encode_response_field_value(
           // List of Enums
           call_doc("json.array", [
             doc.from_string("from: " <> field_access),
-            doc.from_string("of: fn(v) { json.string(" <> snake_case(base_type_name) <> "_to_string(v)) }"),
+            doc.from_string(
+              "of: fn(v) { json.string("
+              <> snake_case(base_type_name)
+              <> "_to_string(v)) }",
+            ),
           ])
         }
         _ -> {
@@ -1448,7 +1452,9 @@ fn encode_response_field_value(
                     Ok(schema.ObjectType(_, _, _)) ->
                       snake_case(name) <> "_to_json"
                     Ok(schema.EnumType(_, _, _)) ->
-                      "fn(v) { json.string(" <> snake_case(name) <> "_to_string(v)) }"
+                      "fn(v) { json.string("
+                      <> snake_case(name)
+                      <> "_to_string(v)) }"
                     _ -> "json.string"
                   }
                 _ -> "json.string"
@@ -1477,7 +1483,11 @@ fn encode_response_field_value(
               // Optional Enum
               call_doc("json.nullable", [
                 doc.from_string(field_access),
-                doc.from_string("fn(v) { json.string(" <> snake_case(base_type_name) <> "_to_string(v)) }"),
+                doc.from_string(
+                  "fn(v) { json.string("
+                  <> snake_case(base_type_name)
+                  <> "_to_string(v)) }",
+                ),
               ])
             }
             _ -> {
diff --git a/test/codegen_test.gleam b/test/codegen_test.gleam
index 8521a0f..6c0c2e6 100644
--- a/test/codegen_test.gleam
+++ b/test/codegen_test.gleam
@@ -2257,7 +2257,10 @@ pub fn generate_query_with_optional_enum_field_test() {
           "CharacterStatus",
           schema.EnumType("CharacterStatus", ["Alive", "Dead", "unknown"], None),
         ),
-        #("Gender", schema.EnumType("Gender", ["Male", "Female", "Genderless"], None)),
+        #(
+          "Gender",
+          schema.EnumType("Gender", ["Male", "Female", "Genderless"], None),
+        ),
         #(
           "Query",
           schema.ObjectType(
@@ -2316,11 +2319,7 @@ pub fn generate_mutation_with_optional_enum_in_input_test() {
       schema.NonNullType(schema.NamedType("ID", schema.Scalar)),
       None,
     ),
-    schema.InputValue(
-      "name",
-      schema.NamedType("String", schema.Scalar),
-      None,
-    ),
+    schema.InputValue("name", schema.NamedType("String", schema.Scalar), None),
     schema.InputValue(
       "status",
       schema.NamedType("CharacterStatus", schema.Enum),