diff --git a/manifests/init.pp b/manifests/init.pp
index 54998bc..3b52ee5 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -22,18 +22,18 @@
           }
 
           ~> package { 'teams':
-            ensure  => installed,
+            ensure  => latest,
             require => Apt::Source['teams'],
           }
 
         }
         default: {
-          notify { 'Unsupported architecture': }
+          fail('Teams only runs on AMD64, your architecture is unsupported.')
         }
       }
     }
     default: {
-      notify { 'Unsupported OS': }
+      fail('The Teams installer module only works with Debian derivatives, your distribution is unsupported.')
     }
   }
 }
diff --git a/spec/classes/teams_spec.rb b/spec/classes/teams_spec.rb
index 4fd26de..c59881e 100644
--- a/spec/classes/teams_spec.rb
+++ b/spec/classes/teams_spec.rb
@@ -24,4 +24,26 @@
       it { is_expected.to contain_package('teams').with('require' => 'Apt::Source[teams]') }
     end
   end
+  context 'should fail on Pis' do
+    let(:facts) do
+      {
+        'os' => {
+          'architecture' => 'armv7l',
+        },
+      }
+    end
+
+    it { is_expected.not_to compile } # this is how to test for the 'fail' built-in function because 'fail' results in a compilation error
+  end # end of the Pi context
+  context 'should fail on RedHat-like OSes' do
+    let(:facts) do
+      {
+        'os' => {
+          'operatingsystem' => 'CentOS',
+        },
+      }
+    end
+
+    it { is_expected.not_to compile } # this is how to test for the 'fail' built-in function because 'fail' results in a compilation error
+  end # end of the Pi context
 end