diff --git a/compiler/forget/package.json b/compiler/forget/package.json
index 4b13049a0f..c2982f58e1 100644
--- a/compiler/forget/package.json
+++ b/compiler/forget/package.json
@@ -8,7 +8,7 @@
     "src"
   ],
   "scripts": {
-    "build": "tsc",
+    "build": "tsc && scripts/hash-dist.sh",
     "bundle:meta": "scripts/bundle-meta.sh",
     "dev": "concurrently \"yarn:build --watch\" \"yarn:playground\"",
     "playground": "cd packages/playground && yarn && yarn dev",
diff --git a/compiler/forget/scripts/hash-dist.sh b/compiler/forget/scripts/hash-dist.sh
new file mode 100755
index 0000000000..8c060ac31d
--- /dev/null
+++ b/compiler/forget/scripts/hash-dist.sh
@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+set -eo pipefail
+
+# Hashes JS files in the dist directory to create a cache-breaker
+
+find dist -name '*.js' | sort | xargs shasum | shasum | awk '{ print $1 }' > dist/HASH
diff --git a/compiler/forget/scripts/jest/makeTransform.js b/compiler/forget/scripts/jest/makeTransform.js
index 99bce4bf21..8fe8112ae1 100644
--- a/compiler/forget/scripts/jest/makeTransform.js
+++ b/compiler/forget/scripts/jest/makeTransform.js
@@ -7,6 +7,7 @@
 
 const ReactForgetBabelPlugin = require("../../dist").default;
 const babelJest = require("babel-jest");
+const { readFileSync } = require("fs");
 
 module.exports = (useForget) => {
   function createTransformer() {
@@ -17,7 +18,17 @@ module.exports = (useForget) => {
         {
           plugins: [
             "@babel/plugin-syntax-jsx",
-            ...(useForget ? [ReactForgetBabelPlugin, {}] : []),
+            ...(useForget
+              ? [
+                  [
+                    ReactForgetBabelPlugin,
+                    {
+                      // Jest hashes the babel config as a cache breaker.
+                      cacheBreaker: readFileSync("dist/HASH", "utf8"),
+                    },
+                  ],
+                ]
+              : []),
           ],
         },
         "@babel/preset-react",