diff --git a/docs/en_US/TrainingService/FrameworkControllerMode.md b/docs/en_US/TrainingService/FrameworkControllerMode.md
index dfa4260eea..d936ba3011 100644
--- a/docs/en_US/TrainingService/FrameworkControllerMode.md
+++ b/docs/en_US/TrainingService/FrameworkControllerMode.md
@@ -57,7 +57,6 @@ assessor:
   builtinAssessorName: Medianstop
   classArgs:
     optimize_mode: maximize
-  gpuNum: 0
 trial:
   codeDir: ~/nni/examples/trials/mnist-tfv1
   taskRoles:
diff --git a/docs/en_US/TrainingService/KubeflowMode.md b/docs/en_US/TrainingService/KubeflowMode.md
index 130dd9b3c6..9097ab7a1f 100644
--- a/docs/en_US/TrainingService/KubeflowMode.md
+++ b/docs/en_US/TrainingService/KubeflowMode.md
@@ -107,7 +107,6 @@ assessor:
   builtinAssessorName: Medianstop
   classArgs:
     optimize_mode: maximize
-  gpuNum: 0
 trial:
   codeDir: .
   worker:
diff --git a/examples/trials/mnist-distributed/config_kubeflow.yml b/examples/trials/mnist-distributed/config_kubeflow.yml
index 87120319ea..96d32bf59a 100644
--- a/examples/trials/mnist-distributed/config_kubeflow.yml
+++ b/examples/trials/mnist-distributed/config_kubeflow.yml
@@ -18,7 +18,6 @@ assessor:
   builtinAssessorName: Medianstop
   classArgs:
     optimize_mode: maximize
-  gpuNum: 0
 trial:
   codeDir: .
   worker:
diff --git a/examples/trials/mnist-pytorch/config_frameworkcontroller.yml b/examples/trials/mnist-pytorch/config_frameworkcontroller.yml
index e01900a8ef..6047f4daf6 100644
--- a/examples/trials/mnist-pytorch/config_frameworkcontroller.yml
+++ b/examples/trials/mnist-pytorch/config_frameworkcontroller.yml
@@ -18,7 +18,6 @@ assessor:
   builtinAssessorName: Medianstop
   classArgs:
     optimize_mode: maximize
-  gpuNum: 0
 trial:
   codeDir: .
   taskRoles:
diff --git a/examples/trials/mnist-tfv1/config_frameworkcontroller.yml b/examples/trials/mnist-tfv1/config_frameworkcontroller.yml
index bf230ea872..63cdb34585 100644
--- a/examples/trials/mnist-tfv1/config_frameworkcontroller.yml
+++ b/examples/trials/mnist-tfv1/config_frameworkcontroller.yml
@@ -18,7 +18,6 @@ assessor:
   builtinAssessorName: Medianstop
   classArgs:
     optimize_mode: maximize
-  gpuNum: 0
 trial:
   codeDir: .
   taskRoles:
diff --git a/src/nni_manager/core/test/nnimanager.test.ts b/src/nni_manager/core/test/nnimanager.test.ts
index a04cb8bad5..27432f3e77 100644
--- a/src/nni_manager/core/test/nnimanager.test.ts
+++ b/src/nni_manager/core/test/nnimanager.test.ts
@@ -49,12 +49,10 @@ describe('Unit test for nnimanager', function () {
                 optimize_mode: 'maximize'
             },
             checkpointDir: '',
-            gpuNum: 0
         },
         assessor: {
             builtinAssessorName: 'Medianstop',
             checkpointDir: '',
-            gpuNum: 1
         }
     }