diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index e462c4b..0ec6199 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -10,23 +10,29 @@ jobs:
     runs-on: ubuntu-latest
     defaults:
       run:
-        working-directory: 'frontend'
+        working-directory: "frontend"
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
 
       # Task 1.1:
+      - name: Installation
+        run: yarn install
+
+      - name: Run tests
+        run: yarn test
 
   deploy-infrastructure:
     name: Deploy infrastructure with Terraform
     runs-on: ubuntu-latest
     # Task 1.2:
+    needs: frontend-tests
     env:
       TF_VAR_my_name: ${{ github.head_ref }}
       ARM_CLIENT_ID: ${{ vars.ARM_CLIENT_ID }}
       ARM_SUBSCRIPTION_ID: ${{ vars.ARM_SUBSCRIPTION_ID }}
       ARM_TENANT_ID: ${{ vars.ARM_TENANT_ID }}
-      ARM_USE_OIDC: 'true'
+      ARM_USE_OIDC: "true"
     outputs:
       resource-group-name: ${{ steps.terraform-output.outputs.resource_group_name }}
       swa-name: ${{ steps.terraform-output.outputs.swa_name }}
@@ -36,7 +42,7 @@ jobs:
     environment: prod
     defaults:
       run:
-        working-directory: 'terraform'
+        working-directory: "terraform"
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -85,7 +91,7 @@ jobs:
       - name: Setup Node.js environment
         uses: actions/setup-node@v4
         with:
-          node-version: '20.x'
+          node-version: "20.x"
 
       - name: Authenticate with Azure
         uses: azure/login@v2
@@ -109,7 +115,7 @@ jobs:
         with:
           azure_static_web_apps_api_token: ${{ steps.get-api-key.outputs.swa_api_key }}
           repo_token: ${{ github.token }}
-          action: 'upload'
-          api_location: ''
-          app_location: 'frontend'
-          output_location: 'dist'
+          action: "upload"
+          api_location: ""
+          app_location: "frontend"
+          output_location: "dist"
diff --git a/yarn.lock b/yarn.lock
new file mode 100644
index 0000000..fb57ccd
--- /dev/null
+++ b/yarn.lock
@@ -0,0 +1,4 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+