diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 7196d9314..2f2744596 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -59,7 +59,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: ["14"]
+        node: ["18"]
     name: Lint on Node ${{ matrix.node }}
     steps:
       - uses: actions/checkout@v2
diff --git a/playground.ts b/playground.ts
index 1e7492646..a512dcd78 100644
--- a/playground.ts
+++ b/playground.ts
@@ -1,32 +1 @@
-import { Schema, z } from "./src";
-
-async function main() {
-  const dateRangeValidator = (val: {
-    startDate?: Date;
-    endDate?: Date;
-    actualDate: Date;
-  }) => {
-    if (!val.startDate && !val.endDate) return true;
-    if (!val.startDate || !val.endDate) return false;
-    return val.actualDate >= val.startDate && val.actualDate <= val.endDate;
-  };
-  z.object({ asdf: z.string() }, { required_error: "asdf" });
-
-  const schema = z
-    .object({
-      startDate: z.date().optional(),
-      endDate: z.date().optional(),
-      actualDate: z.date(),
-    })
-    .refine(dateRangeValidator);
-
-  z.enum(["asdf"], { required_error: "error mesage" });
-  console.log(schema.parse("100px")); // pass
-  console.log(schema.parse("100vw")); // fail
-}
-main();
-
-const myErrorMap: z.ZodErrorMap = (val, ctx) => {
-  return { message: "whatever" };
-};
-z.setErrorMap(myErrorMap);
+import { z } from "./src";