1 files changed, 1 insertions, 1 deletions
diff --git a/app/services/ci/pipeline_artifacts/coverage_report_service.rb b/app/services/ci/pipeline_artifacts/coverage_report_service.rb
index 9c6fdb7a405..de66a4cb045 100644
--- a/app/services/ci/pipeline_artifacts/coverage_report_service.rb
+++ b/app/services/ci/pipeline_artifacts/coverage_report_service.rb
@@ -39,7 +39,7 @@ module Ci
       def carrierwave_file
         strong_memoize(:carrier_wave_file) do
           CarrierWaveStringFile.new_file(
-            file_content: report.to_json,
+            file_content: Gitlab::Json.dump(report),
             filename: Ci::PipelineArtifact::DEFAULT_FILE_NAMES.fetch(:code_coverage),
             content_type: 'application/json'
           )