Exclude testOutputTimestamp from flink streaming tests.
diff --git a/runners/flink/job-server/flink_job_server.gradle b/runners/flink/job-server/flink_job_server.gradle
index 27a116f..12b4d65 100644
--- a/runners/flink/job-server/flink_job_server.gradle
+++ b/runners/flink/job-server/flink_job_server.gradle
@@ -151,6 +151,7 @@
if (streaming) {
excludeCategories 'org.apache.beam.sdk.testing.UsesTestStreamWithProcessingTime'
excludeCategories 'org.apache.beam.sdk.testing.UsesTestStreamWithMultipleStages'
+ excludeCategories 'org.apache.beam.sdk.testing.UsesTestStreamWithOutputTimestamp'
} else {
excludeCategories 'org.apache.beam.sdk.testing.UsesTestStream'
}