diff --git a/edc-web/app/templates/test_data.html b/edc-web/app/templates/test_data.html
index 01949c8..01baebf 100644
--- a/edc-web/app/templates/test_data.html
+++ b/edc-web/app/templates/test_data.html
@@ -91,6 +91,8 @@
     font-size: 13px;
 }
 .btn-delete:hover { background: #e74c3c; color: #fff; }
+#test-data-table th,
+#test-data-table td { white-space: nowrap; }
 </style>
 <script src="https://cdn.jsdelivr.net/npm/echarts@5.5.0/dist/echarts.min.js"></script>
 <script src="{{ url_for('static', filename='js/test_data.js') }}"></script>