diff --git a/spec/controllers/execution_environments_controller_spec.rb b/spec/controllers/execution_environments_controller_spec.rb
index 3507fc8a..fa76b4dd 100644
--- a/spec/controllers/execution_environments_controller_spec.rb
+++ b/spec/controllers/execution_environments_controller_spec.rb
@@ -192,4 +192,20 @@ describe ExecutionEnvironmentsController do
       end
     end
   end
+
+  describe '#synchronize_all_to_poseidon' do
+    let(:execution_environments) { FactoryBot.build_list(:ruby, 3) }
+
+    it 'copies all execution environments to Poseidon' do
+      allow(ExecutionEnvironment).to receive(:all).and_return(execution_environments)
+
+      execution_environments.each do |execution_environment|
+        allow(execution_environment).to receive(:copy_to_poseidon).and_return(true)
+      end
+
+      post :synchronize_all_to_poseidon
+
+      expect(execution_environments).to all(have_received(:copy_to_poseidon).once)
+    end
+  end
 end
diff --git a/spec/policies/execution_environment_policy_spec.rb b/spec/policies/execution_environment_policy_spec.rb
index 41715025..9d0b2539 100644
--- a/spec/policies/execution_environment_policy_spec.rb
+++ b/spec/policies/execution_environment_policy_spec.rb
@@ -58,4 +58,20 @@ describe ExecutionEnvironmentPolicy do
       end
     end
   end
+
+  permissions(:synchronize_all_to_poseidon?) do
+    it 'grants access to the admin' do
+      expect(policy).to permit(FactoryBot.build(:admin))
+    end
+
+    shared_examples 'it does not grant access' do |user|
+      it "does not grant access to a user with role #{user.role}" do
+        expect(policy).not_to permit(user)
+      end
+    end
+
+    %i[teacher external_user].each do |user|
+      include_examples 'it does not grant access', FactoryBot.build(user)
+    end
+  end
 end