diff --git a/spec/policies/exercise_policy_spec.rb b/spec/policies/exercise_policy_spec.rb
index c9762f9e..dcb835c6 100644
--- a/spec/policies/exercise_policy_spec.rb
+++ b/spec/policies/exercise_policy_spec.rb
@@ -30,7 +30,7 @@ describe ExercisePolicy do
     end
   end
 
-  [:clone?, :destroy?, :edit?, :show?, :statistics?, :update?].each do |action|
+  [:clone?, :destroy?, :edit?, :statistics?, :update?].each do |action|
     permissions(action) do
       it 'grants access to admins' do
         expect(subject).to permit(FactoryGirl.build(:admin), exercise)
@@ -52,6 +52,14 @@ describe ExercisePolicy do
     end
   end
 
+  [:show?].each do |action|
+    permissions(action) do
+      it 'not grants access to external users' do
+        expect(subject).not_to permit(FactoryGirl.build(:external_user), exercise)
+      end
+    end
+  end
+
   [:implement?, :submit?].each do |action|
     permissions(action) do
       it 'grants access to anyone' do