Revert require.cache busting

build/jest/base-jest-config.js

@@ -33,7 +33,6 @@ function getReactSetup() {
 const reactSetup = getReactSetup();
 
 module.exports = {
-  cache: false,
   coverageDirectory: `${process.cwd()}/coverage`,
   coverageReporters: ['json'],
   rootDir: process.cwd(),

build/jest/jest-config.js

@@ -14,7 +14,6 @@ const baseJestConfig = require('./base-jest-config.js');
 const projects = process.env.JEST_ENV.split(',');
 
 let config = {
-  cache: false,
   coverageDirectory: `${process.cwd()}/coverage`,
   // collectCoverageFrom doesn't work from project config,
   // must be set at top-level
@@ -25,7 +24,12 @@ let config = {
 // Use projects if we have more than one environment.
 if (projects.length > 1) {
   // $FlowFixMe
-  config.projects = projects.map(project => `<rootDir>/${project}`);
+  config.projects = projects.map(project => {
+    return {
+      // $FlowFixMe
+      ...require(`./${project === 'jsdom' ? 'jsdom' : 'node'}/jest.config.js`),
+    };
+  });
 } else {
   config = {
     // $FlowFixMe

build/jest/jest-transformer.js

@@ -8,12 +8,6 @@
 
 /* eslint-env node */
 
-// Clear require cache before each run to reset file exports between environment runs.
-// Currently the transformer seems like the most robust place to clear cache.
-const clearModule = require('clear-module');
-
-clearModule.all();
-
 const loadFusionRC = require('../load-fusionrc.js');
 
 const babelConfig = require('../babel-preset.js')(null, {