Rails5 mysql fix milliseconds problem in pull request importer spec

changelogs/unreleased/rails5-mysql-fix-pr-importer-spec.yml

+---
+title: Rails5 mysql fix milliseconds problem in pull request importer spec
+merge_request: 20475
+author: Jasper Maes
+type: fixed

spec/lib/gitlab/github_import/importer/pull_requests_importer_spec.rb

@@ -27,9 +27,9 @@ describe Gitlab::GithubImport::Importer::PullRequestsImporter do
       milestone: double(:milestone, number: 4),
       user: double(:user, id: 4, login: 'alice'),
       assignee: double(:user, id: 4, login: 'alice'),
-      created_at: Time.zone.now,
-      updated_at: Time.zone.now,
-      merged_at: Time.zone.now
+      created_at: 1.second.ago,
+      updated_at: 1.second.ago,
+      merged_at: 1.second.ago
     )
   end