diff --git a/cmd/cluster/azure/testdata/zz_fixture_TestCreateCluster_minimal_flags_necessary_to_render.yaml b/cmd/cluster/azure/testdata/zz_fixture_TestCreateCluster_minimal_flags_necessary_to_render.yaml
index 0d3ce9008b..17e5d1634c 100644
--- a/cmd/cluster/azure/testdata/zz_fixture_TestCreateCluster_minimal_flags_necessary_to_render.yaml
+++ b/cmd/cluster/azure/testdata/zz_fixture_TestCreateCluster_minimal_flags_necessary_to_render.yaml
@@ -160,6 +160,7 @@ spec:
         type: ImageID
       machineIdentityID: fakeMachineIdentityID
       osDisk:
+        diskStorageAccountType: Premium_LRS
         sizeGiB: 120
       subnetID: fakeSubnetID
       vmSize: Standard_D4s_v3
diff --git a/cmd/cluster/azure/testdata/zz_fixture_TestCreateCluster_with_availability_ones.yaml b/cmd/cluster/azure/testdata/zz_fixture_TestCreateCluster_with_availability_ones.yaml
index 686a0fbc9a..8842db2def 100644
--- a/cmd/cluster/azure/testdata/zz_fixture_TestCreateCluster_with_availability_ones.yaml
+++ b/cmd/cluster/azure/testdata/zz_fixture_TestCreateCluster_with_availability_ones.yaml
@@ -161,6 +161,7 @@ spec:
         type: ImageID
       machineIdentityID: fakeMachineIdentityID
       osDisk:
+        diskStorageAccountType: Premium_LRS
         sizeGiB: 120
       subnetID: fakeSubnetID
       vmSize: Standard_D4s_v3
@@ -193,6 +194,7 @@ spec:
         type: ImageID
       machineIdentityID: fakeMachineIdentityID
       osDisk:
+        diskStorageAccountType: Premium_LRS
         sizeGiB: 120
       subnetID: fakeSubnetID
       vmSize: Standard_D4s_v3
diff --git a/cmd/nodepool/azure/create.go b/cmd/nodepool/azure/create.go
index c858e76c1c..eac66d3f35 100644
--- a/cmd/nodepool/azure/create.go
+++ b/cmd/nodepool/azure/create.go
@@ -47,7 +47,8 @@ type RawAzurePlatformCreateOptions struct {
 func DefaultOptions() *RawAzurePlatformCreateOptions {
 	return &RawAzurePlatformCreateOptions{
 		AzurePlatformCreateOptions: &AzurePlatformCreateOptions{
-			DiskSize: 120,
+			DiskSize:               120,
+			DiskStorageAccountType: string(hyperv1.DiskStorageAccountTypesPremiumLRS),
 		},
 		AzureMarketPlaceImageInfo: &AzureMarketPlaceImageInfo{},
 	}