diff --git a/demos/grasp_fusion/ros/grasp_fusion/CMakeLists.txt b/demos/grasp_fusion/ros/grasp_fusion/CMakeLists.txt
index 0defed0b5..96f1ffcd9 100644
--- a/demos/grasp_fusion/ros/grasp_fusion/CMakeLists.txt
+++ b/demos/grasp_fusion/ros/grasp_fusion/CMakeLists.txt
@@ -28,6 +28,7 @@ catkin_package(
 )
 
 catkin_generate_virtualenv(
+  CHECK_VENV FALSE
   EXTRA_PIP_ARGS
     -qqq  # Suppress log not to exceed maximum length in travis test
     --upgrade
diff --git a/demos/grasp_prediction_arc2017/ros/grasp_prediction_arc2017/CMakeLists.txt b/demos/grasp_prediction_arc2017/ros/grasp_prediction_arc2017/CMakeLists.txt
index 7241fc06d..974b681ed 100644
--- a/demos/grasp_prediction_arc2017/ros/grasp_prediction_arc2017/CMakeLists.txt
+++ b/demos/grasp_prediction_arc2017/ros/grasp_prediction_arc2017/CMakeLists.txt
@@ -28,6 +28,7 @@ catkin_package(
 )
 
 catkin_generate_virtualenv(
+  CHECK_VENV FALSE
   EXTRA_PIP_ARGS
     -qqq  # Suppress log not to exceed maximum length in travis test
     --upgrade
diff --git a/demos/instance_occlsegm/ros/instance_occlsegm/CMakeLists.txt b/demos/instance_occlsegm/ros/instance_occlsegm/CMakeLists.txt
index 88f6d064f..2c11548a0 100644
--- a/demos/instance_occlsegm/ros/instance_occlsegm/CMakeLists.txt
+++ b/demos/instance_occlsegm/ros/instance_occlsegm/CMakeLists.txt
@@ -106,6 +106,7 @@ catkin_package(
 )
 
 catkin_generate_virtualenv(
+  CHECK_VENV FALSE
   EXTRA_PIP_ARGS
     -qqq  # Suppress log not to exceed maximum length in travis test
     --upgrade