[BEAM-9070] tests use absolute paths for job server jars
diff --git a/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy b/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy
index e7d0816..c4467cd 100644
--- a/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy
+++ b/buildSrc/src/main/groovy/org/apache/beam/gradle/BeamModulePlugin.groovy
@@ -1930,6 +1930,8 @@
               "--parallelism=2",
               "--shutdown_sources_on_final_watermark",
               "--sdk_worker_parallelism=1",
+              "--flink_job_server_jar=${project.project(':runners:flink:1.9:job-server').shadowJar.archivePath}",
+              "--spark_job_server_jar=${project.project(':runners:spark:job-server').shadowJar.archivePath}",
             ]
             if (isStreaming)
               options += [