diff --git a/app/jobs/restart_nodes_job.rb b/app/jobs/restart_nodes_job.rb
index b0063d497..107b042fc 100644
--- a/app/jobs/restart_nodes_job.rb
+++ b/app/jobs/restart_nodes_job.rb
@@ -3,7 +3,7 @@ class RestartNodesJob
 
   def self.perform
     return if NodeInstruction.all_locked?
-    available_nodes = RpmBuildNode.all.map{ |n| n.user_id }.compact.uniq
+    available_nodes = RpmBuildNode.all.map{ |n| n.user_id if n.user.try(:system?) }.compact.uniq
     NodeInstruction.where(status: NodeInstruction::READY).
       where.not(user_id: available_nodes).find_each(&:restart)
   end
diff --git a/spec/factories/node_instructions.rb b/spec/factories/node_instructions.rb
new file mode 100644
index 000000000..82a8aed0b
--- /dev/null
+++ b/spec/factories/node_instructions.rb
@@ -0,0 +1,6 @@
+FactoryGirl.define do
+  factory :node_instruction do
+    association :user, factory: :system_user
+    instruction { FactoryGirl.generate(:string) }
+  end
+end
diff --git a/spec/factories/rpm_build_nodes.rb b/spec/factories/rpm_build_nodes.rb
new file mode 100644
index 000000000..6bb155698
--- /dev/null
+++ b/spec/factories/rpm_build_nodes.rb
@@ -0,0 +1,6 @@
+FactoryGirl.define do
+  factory :rpm_build_node do
+    id      { FactoryGirl.generate(:string) }
+    user_id { FactoryGirl.create(:user).id }
+  end
+end
diff --git a/spec/factories/users.rb b/spec/factories/users.rb
index 3bd5fc3a5..86af559fa 100644
--- a/spec/factories/users.rb
+++ b/spec/factories/users.rb
@@ -12,4 +12,8 @@ FactoryGirl.define do
   factory :admin, parent: :user do
     role 'admin'
   end
+
+  factory :system_user, parent: :user do
+    role 'system'
+  end
 end
diff --git a/spec/jobs/restart_nodes_job_spec.rb b/spec/jobs/restart_nodes_job_spec.rb
new file mode 100644
index 000000000..b84ebc129
--- /dev/null
+++ b/spec/jobs/restart_nodes_job_spec.rb
@@ -0,0 +1,40 @@
+require 'spec_helper'
+
+describe RestartNodesJob do
+
+  it 'ensures that not raises error' do
+    lambda do
+      RestartNodesJob.perform
+    end.should_not raise_exception
+  end
+
+  it 'ensures that do nothing when all instructions disabled' do
+    NodeInstruction.lock_all
+    expect(RpmBuildNode).to_not receive(:all)
+    RestartNodesJob.perform
+  end
+
+  it 'ensures that creates tasks' do
+    allow_any_instance_of(NodeInstruction).to receive(:perform_restart)
+
+    # ABF active node
+    ni1 = FactoryGirl.create(:node_instruction)
+    FactoryGirl.create(:rpm_build_node, user_id: ni1.user_id)
+
+    # User node
+    FactoryGirl.create(:rpm_build_node)
+
+    FactoryGirl.create(:node_instruction, status: NodeInstruction::DISABLED)
+    ni2 = FactoryGirl.create(:node_instruction, status: NodeInstruction::RESTARTING)
+    FactoryGirl.create(:node_instruction, status: NodeInstruction::FAILED)
+
+    ni3 = FactoryGirl.create(:node_instruction)
+
+    RestartNodesJob.perform
+
+    NodeInstruction.where(status: NodeInstruction::RESTARTING).should have(2).items
+    NodeInstruction.where(status: NodeInstruction::RESTARTING).should include(ni2, ni3)
+    NodeInstruction.where(status: NodeInstruction::RESTARTING).should_not include(ni1)
+  end
+
+end
diff --git a/spec/models/node_instruction_spec.rb b/spec/models/node_instruction_spec.rb
new file mode 100644
index 000000000..99d675e22
--- /dev/null
+++ b/spec/models/node_instruction_spec.rb
@@ -0,0 +1,9 @@
+require 'spec_helper'
+
+describe NodeInstruction do
+
+  it 'is valid given valid attributes' do
+    FactoryGirl.build(:node_instruction).should be_valid
+  end
+
+end