diff --git a/system-test/partition-testcases/gce-5-node-3-partition.yml b/system-test/partition-testcases/gce-5-node-3-partition.yml
index 22b6aaea28..5cda862b73 100755
--- a/system-test/partition-testcases/gce-5-node-3-partition.yml
+++ b/system-test/partition-testcases/gce-5-node-3-partition.yml
@@ -12,7 +12,7 @@ steps:
       CLIENT_OPTIONS: "bench-tps=2=--tx_count 15000 --thread-batch-sleep-ms 250"
       TESTNET_ZONES: "us-west1-a"
       USE_PUBLIC_IP_ADDRESSES: "true"
-      ADDITIONAL_FLAGS: ""
+      ADDITIONAL_FLAGS: "--dedicated"
       APPLY_PARTITIONS: "true"
       NETEM_CONFIG_FILE: "system-test/netem-configs/partial-loss-three-partitions"
       PARTITION_ACTIVE_DURATION: 30
diff --git a/system-test/performance-testcases/gce-cpu-only-perf-10-node.yml b/system-test/performance-testcases/gce-cpu-only-perf-10-node.yml
index 8f83b55464..16f65edfdb 100755
--- a/system-test/performance-testcases/gce-cpu-only-perf-10-node.yml
+++ b/system-test/performance-testcases/gce-cpu-only-perf-10-node.yml
@@ -13,6 +13,6 @@ steps:
       CLIENT_OPTIONS: "bench-tps=1=--tx_count 80000 --thread-batch-sleep-ms 1000"
       TESTNET_ZONES: "us-west1-a,us-west1-b,us-central1-a,europe-west4-a"
       USE_PUBLIC_IP_ADDRESSES: "true"
-      ADDITIONAL_FLAGS: ""
+      ADDITIONAL_FLAGS: "--dedicated"
     agents:
       - "queue=gce-deploy"
diff --git a/system-test/performance-testcases/gce-cpu-only-perf-5-node.yml b/system-test/performance-testcases/gce-cpu-only-perf-5-node.yml
index e3c62250e9..e7ac586ebf 100755
--- a/system-test/performance-testcases/gce-cpu-only-perf-5-node.yml
+++ b/system-test/performance-testcases/gce-cpu-only-perf-5-node.yml
@@ -13,6 +13,6 @@ steps:
       CLIENT_OPTIONS: "bench-tps=2=--tx_count 20000 --thread-batch-sleep-ms 250"
       TESTNET_ZONES: "us-west1-a,us-west1-b,us-central1-a,europe-west4-a"
       USE_PUBLIC_IP_ADDRESSES: "true"
-      ADDITIONAL_FLAGS: ""
+      ADDITIONAL_FLAGS: "--dedicated"
     agents:
       - "queue=gce-deploy"