diff --git a/biome.json b/biome.json
index bee01bd683..deaf83da15 100644
--- a/biome.json
+++ b/biome.json
@@ -13,7 +13,6 @@
     "rules": {
       "recommended": true,
       "complexity": {
-        "noUselessSwitchCase": "off",
         "noUselessTernary": "off",
         "useArrowFunction": "off",
         "useOptionalChain": "off"
diff --git a/runtime/compare.js b/runtime/compare.js
index 5812fc09f0..b81b00639c 100644
--- a/runtime/compare.js
+++ b/runtime/compare.js
@@ -236,8 +236,7 @@ function caml_compare_val(a, b, total) {
             if (a > b) return 1;
           }
           break;
-        case 246: // Lazy_tag
-        default: // Block with other tag
+        default: // Lazy_tag or Block with other tag
           if (caml_is_continuation_tag(tag_a)) {
             caml_invalid_argument("compare: continuation value");
             break;
diff --git a/runtime/internalMod.js b/runtime/internalMod.js
index 1722b728cc..bf09932850 100644
--- a/runtime/internalMod.js
+++ b/runtime/internalMod.js
@@ -60,13 +60,10 @@ function caml_CamlinternalMod_init_mod(loc, shape) {
 //Version: < 4.13
 function caml_CamlinternalMod_update_mod(shape, real, x) {
   if (typeof shape === "number")
-    switch (shape) {
-      case 0: //function
-      case 1: //lazy
-      case 2: //class
-      default:
-        caml_update_dummy(real, x);
-    }
+    //function
+    //lazy
+    //class
+    caml_update_dummy(real, x);
   else
     switch (shape[0]) {
       case 0: //module
@@ -123,13 +120,10 @@ function caml_CamlinternalMod_init_mod(loc, shape, cont) {
 function caml_CamlinternalMod_update_mod(shape, real, x, cont) {
   function loop(shape, real, x) {
     if (typeof shape === "number")
-      switch (shape) {
-        case 0: //function
-        case 1: //lazy
-        case 2: //class
-        default:
-          caml_update_dummy(real, x);
-      }
+      //function
+      //lazy
+      //class
+      caml_update_dummy(real, x);
     else
       switch (shape[0]) {
         case 0: //module
diff --git a/runtime/marshal.js b/runtime/marshal.js
index f6eca871cc..27e57a86e5 100644
--- a/runtime/marshal.js
+++ b/runtime/marshal.js
@@ -608,7 +608,11 @@ function caml_marshal_data_size(s, ofs) {
         );
       }
       break;
-    case 0x8495a6bf: /* Intext_magic_number_big */
+    case 0x8495a6bf /* Intext_magic_number_big */:
+      caml_failwith(
+        "Marshal.data_size: object too large to be read back on a 32-bit platform",
+      );
+      break;
     default:
       caml_failwith("Marshal.data_size: bad object");
       break;