diff --git a/cluster_kwargs.yaml b/cluster_kwargs.yaml
index df25870680..c311db888c 100644
--- a/cluster_kwargs.yaml
+++ b/cluster_kwargs.yaml
@@ -14,7 +14,7 @@
 default:
   package_sync: true
   wait_for_workers: true
-  scheduler_vm_types: [m6i.large]
+  scheduler_vm_types: [m7a.large]
   backend_options:
     spot: true
     spot_on_demand_fallback: true
@@ -23,35 +23,35 @@ default:
 # For all tests using the small_client fixture
 small_cluster:
   n_workers: 10
-  worker_vm_types: [m6i.large]  # 2CPU, 8GiB
+  worker_vm_types: [m7a.large]  # 2CPU, 8GiB
 
 # For tests/benchmarks/test_parquet.py
 parquet_cluster:
   n_workers: 15
-  worker_vm_types: [m5.xlarge]  # 4 CPU, 16 GiB
+  worker_vm_types: [m7a.xlarge]  # 4 CPU, 16 GiB
 
 # For tests/benchmarks/test_spill.py
 spill_cluster:
   n_workers: 5
   worker_disk_size: 64
-  worker_vm_types: [m6i.large]  # 2CPU, 8GiB
+  worker_vm_types: [m7a.large]  # 2CPU, 8GiB
 
 # For tests/workflows/test_embarrassingly_parallel.py
 embarrassingly_parallel:
   n_workers: 100
-  worker_vm_types: [m6i.xlarge] # 4 CPU, 16 GiB (preferred default instance)
+  worker_vm_types: [m7a.xlarge] # 4 CPU, 16 GiB (preferred default instance)
   backend_options:
     region: "us-east-1"  # Same region as dataset
 
 # For tests/workflows/test_xgboost_optuna.py
 xgboost_optuna:
   n_workers: 50
-  worker_vm_types: [m6i.xlarge]  # 4 CPU, 16 GiB (preferred default instance)
+  worker_vm_types: [m7a.xlarge]  # 4 CPU, 16 GiB (preferred default instance)
 
 # For tests/workflows/test_uber_lyft.py
 uber_lyft:
   n_workers: 20
-  worker_vm_types: [m6i.xlarge] # 4 CPU, 16 GiB (preferred default instance)
+  worker_vm_types: [m7a.xlarge] # 4 CPU, 16 GiB (preferred default instance)
 
 # For tests/workflows/test_pytorch_optuna.py
 pytorch_optuna:
@@ -66,7 +66,7 @@ pytorch_optuna:
 # For tests/workflows/test_snowflake.py
 snowflake:
   n_workers: 20
-  worker_vm_types: [m6i.xlarge] # 4 CPU, 16 GiB (preferred default instance)
+  worker_vm_types: [m7a.xlarge] # 4 CPU, 16 GiB (preferred default instance)
 
 
 # Specific tests
@@ -80,11 +80,11 @@ test_work_stealing_on_straggling_worker:
 
 test_repeated_merge_spill:
   n_workers: 20
-  worker_vm_types: [m6i.large]
+  worker_vm_types: [m7a.large]
 
 # For tests/workflows/test_from_csv_to_parquet.py
 from_csv_to_parquet:
   n_workers: 10
-  worker_vm_types: [m6i.xlarge]  # 4 CPU, 16 GiB (preferred default instance)
+  worker_vm_types: [m7a.xlarge]  # 4 CPU, 16 GiB (preferred default instance)
   backend_options:
     region: "us-east-1"  # Same region as dataset