diff --git a/.watchmanconfig b/.watchmanconfig
new file mode 100644
index 0000000000..29e4f231e9
--- /dev/null
+++ b/.watchmanconfig
@@ -0,0 +1,3 @@
+{
+  "ignore_dirs": ["node_modules/", "public/"]
+}
diff --git a/jest.config.js b/jest.config.js
index 83eae46cb9..b4a34a5abd 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -19,7 +19,7 @@ const config = {
   // Those packages are ESM, so we need them to be processed by Babel
   transformIgnorePatterns: ['/node_modules/(?!(redent|strip-indent)/)'],
   coverageDirectory: '<rootDir>/coverage',
-  moduleDirectories: ['<rootDir>/node_modules', '<rootDir>/app/javascript'],
+  moduleDirectories: ['node_modules', '<rootDir>/app/javascript'],
   moduleNameMapper: {
     '\\.svg$': '<rootDir>/app/javascript/__mocks__/svg.js',
   },