diff --git a/app/models/ci/pipeline.rb b/app/models/ci/pipeline.rb
index 434b9b64c65..e1b9bc76475 100644
--- a/app/models/ci/pipeline.rb
+++ b/app/models/ci/pipeline.rb
@@ -530,6 +530,17 @@ module Ci
       @latest_builds_with_artifacts ||= builds.latest.with_artifacts_archive.to_a
     end
 
+    # Rails 5.0 autogenerated question mark enum methods return wrong result if enum value is nil.
+    # They always return `false`.
+    # These methods overwrite autogenerated ones to return correct results.
+    def unknown?
+      Gitlab.rails5? ? source.nil? : super
+    end
+
+    def unknown_source?
+      Gitlab.rails5? ? config_source.nil? : super
+    end
+
     private
 
     def ci_yaml_from_repo
diff --git a/app/models/commit_status.rb b/app/models/commit_status.rb
index b6276c2fb50..97d89422594 100644
--- a/app/models/commit_status.rb
+++ b/app/models/commit_status.rb
@@ -189,4 +189,11 @@ class CommitStatus < ActiveRecord::Base
       v =~ /\d+/ ? v.to_i : v
     end
   end
+
+  # Rails 5.0 autogenerated question mark enum methods return wrong result if enum value is nil.
+  # They always return `false`.
+  # This method overwrites the autogenerated one to return correct result.
+  def unknown_failure?
+    Gitlab.rails5? ? failure_reason.nil? : super
+  end
 end