diff --git a/.github/workflows/playwright.yml b/.github/workflows/playwright.yml
new file mode 100644
index 0000000..d4e9bc0
--- /dev/null
+++ b/.github/workflows/playwright.yml
@@ -0,0 +1,22 @@
+name: "UI Test"
+on:
+  pull_request:
+  push:
+jobs:
+  ui_test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v25
+      with:
+        github_access_token: ${{ secrets.GITHUB_TOKEN }}
+    - uses: DeterminateSystems/magic-nix-cache-action@v2
+    - run: nix develop -c -- nix run .\#initialise-data
+    - run: nix develop -c -- nix run .\#test_ui
+    - uses: actions/upload-artifact@v4
+      if: ${{ !cancelled() }}
+      with:
+        name: playwright-report
+        path: playwright-report/
+        retention-days: 30
+
diff --git a/flake.nix b/flake.nix
index a4cfc64..d29095f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -53,6 +53,8 @@
             if "${system}" == "x86_64-linux"
             then "${pkgs.glibcLocalesUtf8}/lib/locale/locale-archive"
             else "";
+          LANG = "en_US.UTF-8";
+          LC_ALL = "en_US.UTF-8";
           R_LIBS_USER = "''"; # to not use users' installed R packages
           R_ZIPCMD = "${pkgs.zip}/bin/zip";
           TEST_PORT = 3000;
diff --git a/tests_UI/test-1.spec.ts b/tests_UI/test-1.spec.ts
index 21fe911..4bbc110 100644
--- a/tests_UI/test-1.spec.ts
+++ b/tests_UI/test-1.spec.ts
@@ -77,7 +77,7 @@ test.describe("PlantBreedGame_UI", () => {
   });
 
   test("Large_requests/full campaing", async ({ page }) => {
-    test.setTimeout(120_000);
+    test.setTimeout(180_000);
     await login(page, "admin", psw);
     await addBreeder(page, "test_UI", psw, "tester");