diff --git a/sdks/python/apache_beam/testing/analyzers/perf_analysis_utils.py b/sdks/python/apache_beam/testing/analyzers/perf_analysis_utils.py
index e8db128ba9f1..f9604c490fc0 100644
--- a/sdks/python/apache_beam/testing/analyzers/perf_analysis_utils.py
+++ b/sdks/python/apache_beam/testing/analyzers/perf_analysis_utils.py
@@ -235,6 +235,7 @@ class MetricsFetcher(metaclass=abc.ABCMeta):
   @abc.abstractmethod
   def fetch_metric_data(
       self,
+      *,
       project,
       metrics_dataset,
       metrics_table,