diff --git a/package.json b/package.json
index 0da4eb32fa..a1943d5d02 100644
--- a/package.json
+++ b/package.json
@@ -94,9 +94,9 @@
       "/node_modules/",
       "/.module-cache/"
     ],
-    "testPathIgnorePatterns": [
-      "/build/",
-      "/node_modules/"
+    "testPathDirs": [
+      "<rootDir>/src",
+      "<rootDir>/vendor/fbtransform"
     ],
     "unmockedModulePathPatterns": [
       ""