diff --git a/tests/unit/__snapshots__/sse.spec.ts.snap b/tests/unit/__snapshots__/sse.spec.ts.snap
index 8bddfbb48..8007b48d9 100644
--- a/tests/unit/__snapshots__/sse.spec.ts.snap
+++ b/tests/unit/__snapshots__/sse.spec.ts.snap
@@ -33,134 +33,59 @@ exports[`SSE > makeResultHandler() > should create ResultHandler describing poss
     "mimeTypes": [
       "text/event-stream",
     ],
-    "schema": ZodDiscriminatedUnion {
-      "_def": {
-        "discriminator": "event",
-        "options": [
-          {
-            "_type": "ZodObject",
-            "shape": {
-              "data": {
+    "schema": {
+      "_type": "ZodDiscriminatedUnion",
+      "discriminator": "event",
+      "options": [
+        {
+          "_type": "ZodObject",
+          "shape": {
+            "data": {
+              "_type": "ZodString",
+            },
+            "event": {
+              "_type": "ZodLiteral",
+              "value": "test",
+            },
+            "id": {
+              "_type": "ZodOptional",
+              "value": {
                 "_type": "ZodString",
               },
-              "event": {
-                "_type": "ZodLiteral",
-                "value": "test",
-              },
-              "id": {
-                "_type": "ZodOptional",
-                "value": {
-                  "_type": "ZodString",
-                },
-              },
-              "retry": {
-                "_type": "ZodOptional",
-                "value": {
-                  "_type": "ZodNumber",
-                },
-              },
             },
-          },
-          {
-            "_type": "ZodObject",
-            "shape": {
-              "data": {
+            "retry": {
+              "_type": "ZodOptional",
+              "value": {
                 "_type": "ZodNumber",
               },
-              "event": {
-                "_type": "ZodLiteral",
-                "value": "another",
-              },
-              "id": {
-                "_type": "ZodOptional",
-                "value": {
-                  "_type": "ZodString",
-                },
-              },
-              "retry": {
-                "_type": "ZodOptional",
-                "value": {
-                  "_type": "ZodNumber",
-                },
-              },
             },
           },
-        ],
-        "optionsMap": Map {
-          "test" => {
-            "_type": "ZodObject",
-            "shape": {
-              "data": {
+        },
+        {
+          "_type": "ZodObject",
+          "shape": {
+            "data": {
+              "_type": "ZodNumber",
+            },
+            "event": {
+              "_type": "ZodLiteral",
+              "value": "another",
+            },
+            "id": {
+              "_type": "ZodOptional",
+              "value": {
                 "_type": "ZodString",
               },
-              "event": {
-                "_type": "ZodLiteral",
-                "value": "test",
-              },
-              "id": {
-                "_type": "ZodOptional",
-                "value": {
-                  "_type": "ZodString",
-                },
-              },
-              "retry": {
-                "_type": "ZodOptional",
-                "value": {
-                  "_type": "ZodNumber",
-                },
-              },
             },
-          },
-          "another" => {
-            "_type": "ZodObject",
-            "shape": {
-              "data": {
+            "retry": {
+              "_type": "ZodOptional",
+              "value": {
                 "_type": "ZodNumber",
               },
-              "event": {
-                "_type": "ZodLiteral",
-                "value": "another",
-              },
-              "id": {
-                "_type": "ZodOptional",
-                "value": {
-                  "_type": "ZodString",
-                },
-              },
-              "retry": {
-                "_type": "ZodOptional",
-                "value": {
-                  "_type": "ZodNumber",
-                },
-              },
             },
           },
         },
-        "typeName": "ZodDiscriminatedUnion",
-      },
-      "and": [Function],
-      "array": [Function],
-      "catch": [Function],
-      "default": [Function],
-      "describe": [Function],
-      "isNullable": [Function],
-      "isOptional": [Function],
-      "nullable": [Function],
-      "nullish": [Function],
-      "optional": [Function],
-      "or": [Function],
-      "parse": [Function],
-      "parseAsync": [Function],
-      "pipe": [Function],
-      "promise": [Function],
-      "readonly": [Function],
-      "refine": [Function],
-      "refinement": [Function],
-      "safeParse": [Function],
-      "safeParseAsync": [Function],
-      "spa": [Function],
-      "superRefine": [Function],
-      "transform": [Function],
+      ],
     },
     "statusCodes": [
       200,
diff --git a/vitest.setup.ts b/vitest.setup.ts
index 798340aab..ccd921c07 100644
--- a/vitest.setup.ts
+++ b/vitest.setup.ts
@@ -68,6 +68,10 @@ const serializers = [
     right,
   })),
   makeSchemaSerializer(z.ZodUnion, ({ options }) => ({ options })),
+  makeSchemaSerializer(
+    z.ZodDiscriminatedUnion,
+    ({ options, discriminator }) => ({ discriminator, options }),
+  ),
   makeSchemaSerializer(z.ZodEffects, ({ _def: { schema: value } }) => ({
     value,
   })),