diff --git a/packages/jest-diff/package.json b/packages/jest-diff/package.json
index 912b02498efa..8e841add0ea5 100644
--- a/packages/jest-diff/package.json
+++ b/packages/jest-diff/package.json
@@ -7,7 +7,6 @@
   },
   "license": "BSD-3-Clause",
   "main": "build/index.js",
-  "browser": "build-es5/index.js",
   "dependencies": {
     "chalk": "^1.1.3",
     "diff": "^3.2.0",
diff --git a/packages/jest-get-type/package.json b/packages/jest-get-type/package.json
index 387cc3df5cef..b14bc561f51e 100644
--- a/packages/jest-get-type/package.json
+++ b/packages/jest-get-type/package.json
@@ -7,6 +7,5 @@
     "url": "https://github.com/facebook/jest.git"
   },
   "license": "BSD-3-Clause",
-  "main": "build/index.js",
-  "browser": "build-es5/index.js"
+  "main": "build/index.js"
 }
diff --git a/packages/jest-matcher-utils/package.json b/packages/jest-matcher-utils/package.json
index 04a3ac921717..827afd9c862f 100644
--- a/packages/jest-matcher-utils/package.json
+++ b/packages/jest-matcher-utils/package.json
@@ -8,7 +8,6 @@
   },
   "license": "BSD-3-Clause",
   "main": "build/index.js",
-  "browser": "build-es5/index.js",
   "dependencies": {
     "chalk": "^1.1.3",
     "jest-get-type": "^20.0.3",
diff --git a/packages/jest-message-util/package.json b/packages/jest-message-util/package.json
index 0f97afa380b9..c0d72268b023 100644
--- a/packages/jest-message-util/package.json
+++ b/packages/jest-message-util/package.json
@@ -7,7 +7,6 @@
   },
   "license": "BSD-3-Clause",
   "main": "build/index.js",
-  "browser": "build-es5/index.js",
   "dependencies": {
     "chalk": "^1.1.3",
     "micromatch": "^2.3.11",
diff --git a/packages/jest-regex-util/package.json b/packages/jest-regex-util/package.json
index 1e6648a37c56..671e9a5115b0 100644
--- a/packages/jest-regex-util/package.json
+++ b/packages/jest-regex-util/package.json
@@ -6,6 +6,5 @@
     "url": "https://github.com/facebook/jest.git"
   },
   "license": "BSD-3-Clause",
-  "main": "build/index.js",
-  "browser": "build-es5/index.js"
+  "main": "build/index.js"
 }
diff --git a/packages/jest-util/package.json b/packages/jest-util/package.json
index d1f064494724..02087fc61038 100644
--- a/packages/jest-util/package.json
+++ b/packages/jest-util/package.json
@@ -7,7 +7,6 @@
   },
   "license": "BSD-3-Clause",
   "main": "build/index.js",
-  "browser": "build-es5/index.js",
   "dependencies": {
     "chalk": "^1.1.3",
     "graceful-fs": "^4.1.11",
diff --git a/packages/jest-validate/package.json b/packages/jest-validate/package.json
index eb878d371294..324d0582dab6 100644
--- a/packages/jest-validate/package.json
+++ b/packages/jest-validate/package.json
@@ -7,7 +7,6 @@
   },
   "license": "BSD-3-Clause",
   "main": "build/index.js",
-  "browser": "build-es5/index.js",
   "dependencies": {
     "chalk": "^1.1.3",
     "jest-get-type": "^20.0.3",
diff --git a/packages/pretty-format/package.json b/packages/pretty-format/package.json
index c1bebc27323a..60c6c548dac1 100644
--- a/packages/pretty-format/package.json
+++ b/packages/pretty-format/package.json
@@ -8,7 +8,6 @@
   "license": "BSD-3-Clause",
   "description": "Stringify any JavaScript value.",
   "main": "build/index.js",
-  "browser": "build-es5/index.js",
   "author": "James Kyle <me@thejameskyle.com>",
   "dependencies": {
     "ansi-regex": "^2.1.1",