diff --git a/lib/gitlab/ci/status/build/failed.rb b/lib/gitlab/ci/status/build/failed.rb
index e87f5e42aa8..86aa7396c98 100644
--- a/lib/gitlab/ci/status/build/failed.rb
+++ b/lib/gitlab/ci/status/build/failed.rb
@@ -4,13 +4,13 @@ module Gitlab
       module Build
         class Failed < Status::Extended
           REASONS = {
-            'unknown_failure' => 'unknown failure',
-            'script_failure' => 'script failure',
-            'api_failure' => 'API failure',
-            'stuck_or_timeout_failure' => 'stuck or timeout failure',
-            'runner_system_failure' => 'runner system failure',
-            'missing_dependency_failure' => 'missing dependency failure',
-            # COMMENTED to check if CI fails: 'runner_unsupported' => 'unsuported runner',
+            unknown_failure: 'unknown failure',
+            script_failure: 'script failure',
+            api_failure: 'API failure',
+            stuck_or_timeout_failure: 'stuck or timeout failure',
+            runner_system_failure: 'runner system failure',
+            missing_dependency_failure: 'missing dependency failure',
+            runner_unsupported: 'Your runner is outdated, please upgrade your runner'
           }.freeze
 
           def status_tooltip
@@ -32,7 +32,11 @@ module Gitlab
           end
 
           def description
-            "<br> (#{REASONS[subject.failure_reason]})"
+            "<br> (#{failure_reason_message})"
+          end
+
+          def failure_reason_message
+            REASONS.fetch(subject.failure_reason.to_sym)
           end
         end
       end
diff --git a/spec/lib/gitlab/ci/status/build/failed_spec.rb b/spec/lib/gitlab/ci/status/build/failed_spec.rb
index cadb424ea2c..b6676b40fd3 100644
--- a/spec/lib/gitlab/ci/status/build/failed_spec.rb
+++ b/spec/lib/gitlab/ci/status/build/failed_spec.rb
@@ -80,4 +80,31 @@ describe Gitlab::Ci::Status::Build::Failed do
       end
     end
   end
+
+  describe 'covers all failure reasons' do
+    let(:status) { Gitlab::Ci::Status::Failed.new(build, user) }
+    let(:tooltip) { subject.status_tooltip }
+
+    CommitStatus.failure_reasons.keys.each do |failure_reason|
+      context failure_reason do
+        before do
+          build.failure_reason = failure_reason
+        end
+
+        it "is a valid status" do
+          expect { tooltip }.not_to raise_error
+        end
+      end
+    end
+
+    context 'invalid failure message' do
+      before do
+        expect(build).to receive(:failure_reason) { 'invalid failure message' }
+      end
+
+      it "is an invalid status" do
+        expect { tooltip }.to raise_error(/key not found:/)
+      end
+    end
+  end
 end