diff --git a/webpack.main.config.js b/webpack.main.config.js
index 86a242024cd298d6754766b405315a02e810436b..61f183d155f49eab547bb05d7fb2ce0a0be31451 100644
--- a/webpack.main.config.js
+++ b/webpack.main.config.js
@@ -12,7 +12,12 @@ module.exports = {
           from: path.join("resources"),
           to: "resources",
           globOptions: {
-            ignore: ["**/.test/**", "**/.snakemake/**", "**/.git/**"],
+            ignore: [
+              "**/.test/**",
+              "**/.snakemake/**",
+              "**/.git/**",
+              "**/test_data/**",
+            ],
           },
         },
         { from: "src/backend", to: "backend" },