diff --git a/scripts/jest/ts-preprocessor.js b/scripts/jest/ts-preprocessor.js
index bed9f1c4d2..ec10c03109 100644
--- a/scripts/jest/ts-preprocessor.js
+++ b/scripts/jest/ts-preprocessor.js
@@ -19,7 +19,16 @@ function compile(content, contentFilename) {
   var output = null;
   var compilerHost = {
     getSourceFile: function(filename, languageVersion) {
-      var source;
+      var source, reactRegex;
+
+      // Accomodations for backslashes in Windows file paths.
+      if (process.platform === 'win32') {
+        filename = filename.replace(/\//g, '\\');
+        reactRegex = /\\(?:React|ReactDOM)(?:\.d)?\.ts$/;
+      } else {
+        reactRegex = /\/(?:React|ReactDOM)(?:\.d)?\.ts$/;
+      }
+
       if (filename === 'lib.d.ts') {
         source = fs.readFileSync(
           require.resolve('typescript/bin/lib.d.ts')
@@ -30,7 +39,7 @@ function compile(content, contentFilename) {
         ).toString();
       } else if (filename === contentFilename) {
         source = content;
-      } else if (/\/(?:React|ReactDOM)(?:\.d)?\.ts$/.test(filename)) {
+      } else if (reactRegex.test(filename)) {
         // TypeScript will look for the .d.ts files in each ancestor directory,
         // so there may not be a file at the referenced path as it climbs the
         // hierarchy.