diff --git a/packages/core/jest.config.js b/packages/core/jest.config.js
deleted file mode 100644
index 24f49ab59a4c..000000000000
--- a/packages/core/jest.config.js
+++ /dev/null
@@ -1 +0,0 @@
-module.exports = require('../../jest/jest.config.js');
diff --git a/packages/deno/jest.config.js b/packages/deno/jest.config.js
deleted file mode 100644
index 24f49ab59a4c..000000000000
--- a/packages/deno/jest.config.js
+++ /dev/null
@@ -1 +0,0 @@
-module.exports = require('../../jest/jest.config.js');
diff --git a/packages/gatsby/jest.config.js b/packages/gatsby/jest.config.js
deleted file mode 100644
index 3770aa5b0db2..000000000000
--- a/packages/gatsby/jest.config.js
+++ /dev/null
@@ -1,10 +0,0 @@
-const baseConfig = require('../../jest/jest.config.js');
-
-module.exports = {
-  ...baseConfig,
-  testEnvironment: 'jsdom',
-  transform: {
-    '^.+\\.js$': 'ts-jest',
-    ...baseConfig.transform,
-  },
-};