diff --git a/jest.config.js b/jest.config.js
index 66425c7c7913..2c2b1fa9db56 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -50,6 +50,7 @@ module.exports = {
     "<rootDir>/build/",
   ],
   resolver: supportsESM ? "./test/jestExportsMapResolver.cjs" : null,
+  extensionsToTreatAsEsm: supportsESM ? [".ts"] : null,
   // We don't need module name mappers here as depedencies of workspace
   // package should be declared explicitly in the package.json
   // Yarn will generate correct file links so that Jest can resolve correctly
diff --git a/packages/babel-helper-compilation-targets/test/load-browserslist-package-json/package.json b/packages/babel-helper-compilation-targets/test/load-browserslist-package-json/package.json
index 6cb011cbaae3..07bb61752931 100644
--- a/packages/babel-helper-compilation-targets/test/load-browserslist-package-json/package.json
+++ b/packages/babel-helper-compilation-targets/test/load-browserslist-package-json/package.json
@@ -1,3 +1,4 @@
 {
+  "type": "module",
   "browserslist": "chrome 4"
 }
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-injected/options.json b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-injected/options.json
index be7a52a5c5c6..0ff82d9c69f4 100644
--- a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-injected/options.json
+++ b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-injected/options.json
@@ -1,3 +1,3 @@
 {
-  "plugins": ["transform-typescript", "./plugin"]
+  "plugins": ["transform-typescript", "./plugin.cjs"]
 }
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-injected/plugin.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-injected/plugin.cjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-injected/plugin.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/elide-injected/plugin.cjs
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/parameter-decorators/options.json b/packages/babel-plugin-transform-typescript/test/fixtures/imports/parameter-decorators/options.json
index dcdc6eed36c0..366ea0749248 100644
--- a/packages/babel-plugin-transform-typescript/test/fixtures/imports/parameter-decorators/options.json
+++ b/packages/babel-plugin-transform-typescript/test/fixtures/imports/parameter-decorators/options.json
@@ -7,6 +7,6 @@
         "legacy": true
       }
     ],
-    "./plugin"
+    "./plugin.cjs"
   ]
 }
diff --git a/packages/babel-plugin-transform-typescript/test/fixtures/imports/parameter-decorators/plugin.js b/packages/babel-plugin-transform-typescript/test/fixtures/imports/parameter-decorators/plugin.cjs
similarity index 100%
rename from packages/babel-plugin-transform-typescript/test/fixtures/imports/parameter-decorators/plugin.js
rename to packages/babel-plugin-transform-typescript/test/fixtures/imports/parameter-decorators/plugin.cjs