diff --git a/pkg/common/parameters.go b/pkg/common/parameters.go
index e80346ed8..872837193 100644
--- a/pkg/common/parameters.go
+++ b/pkg/common/parameters.go
@@ -343,7 +343,7 @@ func ExtractModifyVolumeParameters(parameters map[string]string) (ModifyVolumePa
 			}
 			modifyVolumeParams.IOPS = &iops
 		case "throughput":
-			throughput, err := ConvertStringToInt64(value)
+			throughput, err := ConvertMiStringToInt64(value)
 			if err != nil {
 				return ModifyVolumeParameters{}, fmt.Errorf("parameters contain invalid throughput parameter: %w", err)
 			}
diff --git a/pkg/common/parameters_test.go b/pkg/common/parameters_test.go
index cb60ecff0..35a116325 100644
--- a/pkg/common/parameters_test.go
+++ b/pkg/common/parameters_test.go
@@ -485,7 +485,7 @@ func TestSnapshotParameters(t *testing.T) {
 func TestExtractModifyVolumeParameters(t *testing.T) {
 	parameters := map[string]string{
 		"iops":       "1000",
-		"throughput": "500",
+		"throughput": "500Mi",
 	}
 
 	iops := int64(1000)
diff --git a/pkg/gce-pd-csi-driver/controller_test.go b/pkg/gce-pd-csi-driver/controller_test.go
index 0e79a3663..06db7222e 100644
--- a/pkg/gce-pd-csi-driver/controller_test.go
+++ b/pkg/gce-pd-csi-driver/controller_test.go
@@ -1789,7 +1789,7 @@ func TestCreateVolumeWithVolumeAttributeClassParameters(t *testing.T) {
 						},
 					},
 				},
-				MutableParameters: map[string]string{"iops": "20000", "throughput": "600"},
+				MutableParameters: map[string]string{"iops": "20000", "throughput": "600Mi"},
 			},
 			expIops:       20000,
 			expThroughput: 600,
@@ -1822,7 +1822,7 @@ func TestCreateVolumeWithVolumeAttributeClassParameters(t *testing.T) {
 						},
 					},
 				},
-				MutableParameters: map[string]string{"iops": "20000", "throughput": "600"},
+				MutableParameters: map[string]string{"iops": "20000", "throughput": "600Mi"},
 			},
 			expIops:       0,
 			expThroughput: 0,
@@ -1890,7 +1890,7 @@ func TestVolumeModifyOperation(t *testing.T) {
 			name: "Update volume with valid parameters",
 			req: &csi.ControllerModifyVolumeRequest{
 				VolumeId:          testVolumeID,
-				MutableParameters: map[string]string{"iops": "20000", "throughput": "600"},
+				MutableParameters: map[string]string{"iops": "20000", "throughput": "600Mi"},
 			},
 			diskType: "hyperdisk-balanced",
 			params: &common.DiskParameters{
@@ -1906,7 +1906,7 @@ func TestVolumeModifyOperation(t *testing.T) {
 			name: "Update volume with invalid parameters",
 			req: &csi.ControllerModifyVolumeRequest{
 				VolumeId:          testVolumeID,
-				MutableParameters: map[string]string{"iops": "0", "throughput": "0"},
+				MutableParameters: map[string]string{"iops": "0", "throughput": "0Mi"},
 			},
 			diskType: "hyperdisk-balanced",
 			params: &common.DiskParameters{
@@ -1922,7 +1922,7 @@ func TestVolumeModifyOperation(t *testing.T) {
 			name: "Update volume with valid parameters but invalid disk type",
 			req: &csi.ControllerModifyVolumeRequest{
 				VolumeId:          testVolumeID,
-				MutableParameters: map[string]string{"iops": "20000", "throughput": "600"},
+				MutableParameters: map[string]string{"iops": "20000", "throughput": "600Mi"},
 			},
 			diskType: "pd-ssd",
 			params: &common.DiskParameters{
@@ -2053,7 +2053,7 @@ func TestVolumeModifyErrorHandling(t *testing.T) {
 				},
 			},
 			modifyReq: &csi.ControllerModifyVolumeRequest{
-				MutableParameters: map[string]string{"iops": "3001", "throughput": "151"},
+				MutableParameters: map[string]string{"iops": "3001", "throughput": "151Mi"},
 			},
 			modifyVolumeErrors: map[*meta.Key]error{
 				meta.ZonalKey(name, "us-central1-a"): &googleapi.Error{
@@ -2089,7 +2089,7 @@ func TestVolumeModifyErrorHandling(t *testing.T) {
 				},
 			},
 			modifyReq: &csi.ControllerModifyVolumeRequest{
-				MutableParameters: map[string]string{"iops": "10000", "throughput": "2400"},
+				MutableParameters: map[string]string{"iops": "10000", "throughput": "2400Mi"},
 			},
 			modifyVolumeErrors: map[*meta.Key]error{
 				meta.ZonalKey(name, "us-central1-a"): &googleapi.Error{Code: int(codes.InvalidArgument), Message: "InvalidArgument"},
diff --git a/test/k8s-integration/config/hdb-volumeattributesclass.yaml b/test/k8s-integration/config/hdb-volumeattributesclass.yaml
index f032912d2..73d5ff4f9 100644
--- a/test/k8s-integration/config/hdb-volumeattributesclass.yaml
+++ b/test/k8s-integration/config/hdb-volumeattributesclass.yaml
@@ -5,4 +5,4 @@ metadata:
 driverName: pd.csi.storage.gke.io
 parameters:
   iops: "3600"
-  throughput: "290"
\ No newline at end of file
+  throughput: "290Mi"
\ No newline at end of file