diff --git a/apis/opts/diskquota.go b/apis/opts/diskquota.go
index 99bd61987..929d54994 100644
--- a/apis/opts/diskquota.go
+++ b/apis/opts/diskquota.go
@@ -11,7 +11,7 @@ func ParseDiskQuota(quotas []string) (map[string]string, error) {
 
 	for _, quota := range quotas {
 		if quota == "" {
-			return nil, fmt.Errorf("invalid format for disk quota: %s", quota)
+			return nil, fmt.Errorf("invalid format for disk quota: quota cannot be empty string")
 		}
 
 		parts := strings.Split(quota, "=")
diff --git a/apis/opts/diskquota_test.go b/apis/opts/diskquota_test.go
index 500fa8753..873bd4e7e 100644
--- a/apis/opts/diskquota_test.go
+++ b/apis/opts/diskquota_test.go
@@ -19,7 +19,8 @@ func TestParseDiskQuota(t *testing.T) {
 		{name: "test1", args: args{diskquota: []string{""}}, want: nil, wantErr: true},
 		{name: "test2", args: args{diskquota: []string{"foo=foo=foo"}}, want: nil, wantErr: true},
 		{name: "test3", args: args{diskquota: []string{"foo"}}, want: map[string]string{"/": "foo"}, wantErr: false},
-		{name: "test3", args: args{diskquota: []string{"foo=foo"}}, want: map[string]string{"foo": "foo"}, wantErr: false},
+		{name: "test4", args: args{diskquota: []string{"foo=foo"}}, want: map[string]string{"foo": "foo"}, wantErr: false},
+		{name: "test5", args: args{diskquota: []string{"foo=foo", "bar=bar"}}, want: map[string]string{"foo": "foo", "bar": "bar"}, wantErr: false},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {