diff --git a/gentest/gentest-validate.ts b/gentest/gentest-validate.ts
new file mode 100644
index 00000000..9f69f1c8
--- /dev/null
+++ b/gentest/gentest-validate.ts
@@ -0,0 +1,40 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import * as fs from 'node:fs/promises';
+import {dirname} from 'path';
+import {fileURLToPath} from 'url';
+import signedsource from 'signedsource';
+
+const yogaDir = dirname(dirname(fileURLToPath(import.meta.url)));
+const cppTestDir = `${yogaDir}/tests/generated`;
+const jsTestDir = `${yogaDir}/javascript/tests/generated`;
+const javaTestDir = `${yogaDir}/java/tests/com/facebook/yoga`;
+const testDirs = [cppTestDir, jsTestDir, javaTestDir];
+
+for (const testDir of testDirs) {
+  const tests = await fs.readdir(testDir);
+
+  for (const test of tests) {
+    const testData = await fs.readFile(`${testDir}/${test}`, 'utf8');
+    try {
+      const validSignature = signedsource.verifySignature(testData);
+      if (!validSignature) {
+        console.error(`Invalid signature for ${test}`);
+        process.exitCode = 1;
+      }
+    } catch (e) {
+      // Java test dir does not separate generated tests from non-generated ones
+      if (testDir != javaTestDir) {
+        console.error(`${test}: ${e}`);
+        process.exitCode = 1;
+      }
+    }
+  }
+}
diff --git a/gentest/package.json b/gentest/package.json
index 1d653ea9..1c472827 100644
--- a/gentest/package.json
+++ b/gentest/package.json
@@ -3,7 +3,8 @@
   "version": "0.0.0",
   "private": true,
   "scripts": {
-    "gentest": "node --loader=babel-register-esm ./gentest-driver.ts"
+    "gentest": "node --loader=babel-register-esm ./gentest-driver.ts",
+    "gentest-validate": "node --loader=babel-register-esm ./gentest-validate.ts"
   },
   "type": "module",
   "dependencies": {
diff --git a/package.json b/package.json
index 83fde0a1..4e8ae291 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,8 @@
     "lint": "eslint .",
     "lint:fix": "eslint . --fix",
     "tsc": "yarn workspaces run tsc",
-    "gentest": "yarn workspace gentest run gentest"
+    "gentest": "yarn workspace gentest run gentest",
+    "gentest-validate": "yarn workspace gentest run gentest-validate"
   },
   "workspaces": [
     "javascript",
@@ -16,7 +17,6 @@
   "devDependencies": {
     "@typescript-eslint/eslint-plugin": "^5.30.5",
     "@typescript-eslint/parser": "^5.30.5",
-    "babel-register-esm": "^1.2.5",
     "eslint": "^8.30.0",
     "eslint-config-prettier": "^8.5.0",
     "eslint-plugin-jest": "^27.1.7",