diff --git a/integration-tests/__tests__/__snapshots__/show_config.test.js.snap b/integration-tests/__tests__/__snapshots__/show_config.test.js.snap
index 43a2c9b36c5e..22911ad113be 100644
--- a/integration-tests/__tests__/__snapshots__/show_config.test.js.snap
+++ b/integration-tests/__tests__/__snapshots__/show_config.test.js.snap
@@ -54,6 +54,12 @@ exports[`--showConfig outputs config info and exits 1`] = `
       \\"testRunner\\": \\"<<REPLACED_JEST_PACKAGES_DIR>>/jest-jasmine2/build/index.js\\",
       \\"testURL\\": \\"about:blank\\",
       \\"timers\\": \\"real\\",
+      \\"transform\\": [
+        [
+          \\"^.+\\\\\\\\.jsx?$\\",
+          \\"<<REPLACED_JEST_PACKAGES_DIR>>/babel-jest/build/index.js\\"
+        ]
+      ],
       \\"transformIgnorePatterns\\": [
         \\"/node_modules/\\"
       ],
diff --git a/packages/jest-config/src/__tests__/normalize.test.js b/packages/jest-config/src/__tests__/normalize.test.js
index b4a9c00487f6..718e24404c32 100644
--- a/packages/jest-config/src/__tests__/normalize.test.js
+++ b/packages/jest-config/src/__tests__/normalize.test.js
@@ -684,9 +684,10 @@ describe('babel-jest', () => {
   beforeEach(() => {
     Resolver = require('jest-resolve');
     Resolver.findNodeModule = jest.fn(
-      name => {
-        return name.indexOf('babel-jest') === -1 ? path.sep + 'node_modules' + path.sep + name : name;
-      }
+      name =>
+        name.indexOf('babel-jest') === -1
+          ? path.sep + 'node_modules' + path.sep + name
+          : name,
     );
   });
 
@@ -699,9 +700,7 @@ describe('babel-jest', () => {
     );
 
     expect(options.transform[0][0]).toBe(DEFAULT_JS_PATTERN);
-    expect(options.transform[0][1]).toEqual(
-      require.resolve('babel-jest'),
-    );
+    expect(options.transform[0][1]).toEqual(require.resolve('babel-jest'));
     expect(options.setupFiles).toEqual([
       path.sep +
         'node_modules' +
diff --git a/packages/jest-config/src/normalize.js b/packages/jest-config/src/normalize.js
index 7c85964f3b57..93b3ce7ae6cb 100644
--- a/packages/jest-config/src/normalize.js
+++ b/packages/jest-config/src/normalize.js
@@ -29,11 +29,7 @@ import {
   getTestEnvironment,
   resolve,
 } from './utils';
-import {
-  NODE_MODULES,
-  DEFAULT_JS_PATTERN,
-  DEFAULT_REPORTER_LABEL,
-} from './constants';
+import {DEFAULT_JS_PATTERN, DEFAULT_REPORTER_LABEL} from './constants';
 import {validateReporters} from './reporter_validation_errors';
 import DEFAULT_CONFIG from './defaults';
 import DEPRECATED_CONFIG from './deprecated';
@@ -103,7 +99,6 @@ const setupPreset = (
 };
 
 const setupBabelJest = (options: InitialOptions) => {
-  const basedir = options.rootDir;
   const transform = options.transform;
   let babelJest;
   if (transform) {
@@ -113,11 +108,11 @@ const setupBabelJest = (options: InitialOptions) => {
     });
 
     if (customJSPattern) {
-      const customJSTransformer = options.transform[customJSPattern];
+      const customJSTransformer = transform[customJSPattern];
 
       if (customJSTransformer === 'babel-jest') {
         babelJest = require.resolve('babel-jest');
-        options.transform[customJSPattern] = babelJest;
+        transform[customJSPattern] = babelJest;
       } else if (customJSTransformer.includes('babel-jest')) {
         babelJest = customJSTransformer;
       }
@@ -125,7 +120,7 @@ const setupBabelJest = (options: InitialOptions) => {
   } else {
     babelJest = require.resolve('babel-jest');
     options.transform = {
-      [DEFAULT_JS_PATTERN]: babelJest
+      [DEFAULT_JS_PATTERN]: babelJest,
     };
   }