diff --git a/node-hub/opencv-plot/tests/test_opencv_plot.py b/node-hub/opencv-plot/tests/test_opencv_plot.py
new file mode 100644
index 00000000..201975fc
--- /dev/null
+++ b/node-hub/opencv-plot/tests/test_opencv_plot.py
@@ -0,0 +1,2 @@
+def test_placeholder():
+    pass
diff --git a/node-hub/opencv-video-capture/tests/test_opencv_video_capture.py b/node-hub/opencv-video-capture/tests/test_opencv_video_capture.py
new file mode 100644
index 00000000..201975fc
--- /dev/null
+++ b/node-hub/opencv-video-capture/tests/test_opencv_video_capture.py
@@ -0,0 +1,2 @@
+def test_placeholder():
+    pass
diff --git a/node-hub/ultralytics-yolo/tests/test_ultralytics_yolo.py b/node-hub/ultralytics-yolo/tests/test_ultralytics_yolo.py
new file mode 100644
index 00000000..201975fc
--- /dev/null
+++ b/node-hub/ultralytics-yolo/tests/test_ultralytics_yolo.py
@@ -0,0 +1,2 @@
+def test_placeholder():
+    pass