Big gap between chapter and text

I want to build a document, where i am using memoir class, using chapters as a headline for each section.

My problem is, that there is a gap between the chapter and the "normal" text underneath, that i want to decrease. I have already tried patchcmd but i couldn’t figure it out. The code i’m using is:

documentclass[a4paper,12pt,oneside]{memoir} 
usepackage{colortbl}                   
usepackage{lipsum}                         
usepackage{etoolbox}
makeatletter

newififchapternonum
makechapterstyle{jenor}{                   
  renewcommandbeforechapskip{0pt}
  renewcommandprintchaptername{}
  renewcommandprintchapternum{}
  renewcommandprintchapternonum{chapternonumtrue}
  renewcommandchaptitlefont{fontfamily{pbk}fontseries{db}fontshape{n}fontsize{25}{35}selectfontraggedleft}
  renewcommandchapnumfont{fontfamily{pbk}fontseries{m}fontshape{n}fontsize{0.5in}{0in}selectfontcolor{numbercolor}}
  renewcommandprintchaptertitle[1]{%
    noindent
    ifchapternonum
    begin{tabularx}{textwidth}{l}
    {letnewlinechaptitlefont ##1par} 
    end{tabularx}
    parvskip1mmhrule
    else
    begin{tabularx}{textwidth}{l}
    raisebox{-5pt}{chapnumfont thechapter} {{textwidth}{chaptitlefont ##1}} 
    end{tabularx}
    parvskip2mmhrule
    fi
  }
}         

chapterstyle{jenor}

makepagestyle{Uni}                 
usepackage{geometry}
    geometry{
    top=1in,
    inner=1in,
    outer=1in,
    bottom=1in,
    headheight=3ex,
    headsep=2ex,
    footskip = 10ex,
    }

begin{document}
chapter{This is a test}
lipsum[1-1]
end{document}