SQL Express 2016 Install Command Prompt

I am trying to get a command prompt SQL Express 2016 install to work. For whatever reason it doesn't seem to apply my parameters to the install such as the sa account password, or the domain user along with the instance name. Here is what my command looks like..

SQLServer2016-SSEI-Expr.exe/ACTION=INSTALL/UIMODE=Normal/IACCEPTSQLSERVERLICENSETERMS/ENU/UpdateEnabled=1/FEAUTRES=SQLEngine,Conn,SDK/INSTANCENAME="MSSQLSERVER"/TCPENABLED=1/SECURITYMODE=SQL/SQLSYSADMINACCOUNTS="domain\dbtest"/SAPWD="P@ssw0rdF@ke!"/TCPENABLED=1

Any ideas what I am doing wrong?