diff --git a/.github/workflows/debug.yml b/.github/workflows/debug.yml
index bf8fd09..b17a5df 100644
--- a/.github/workflows/debug.yml
+++ b/.github/workflows/debug.yml
@@ -20,24 +20,22 @@ jobs:
         # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
         uses: actions/checkout@v2
 
-      # - name: "Setup TeX Live"
-      #   # ##
-      #   # uses: DanySK/setup-texlive-action@master
-      #   # with:
-      #   #   requirements-file: .github/texlive/packages.test.txt
-      #   # ##
-      #   # uses: teatimeguest/setup-texlive-action@v1
-      #   # with:
-      #   #   package-file: .github/texlive/packages.test.txt
-      #   # ##
-      #   # uses: paolobrasolin/setup-texlive-action@v1
-      #   # with:
-      #   #   packages-path: .github/texlive/packages.test.txt
+      - name: "Setup TeX Live"
+        # ##
+        # uses: DanySK/setup-texlive-action@master
+        # with:
+        #   requirements-file: .github/texlive/packages.test.txt
+        # ##
+        uses: teatimeguest/setup-texlive-action@v1
+        with:
+          package-file: .github/texlive/packages.test.txt
+        # ##
+        # uses: paolobrasolin/setup-texlive-action@v1
+        # with:
+        #   packages-path: .github/texlive/packages.test.txt
 
       # - name: "install tikz-trackschematic"
-      #   run: |
-      #     chmod +x dev-install.sh
-      #     ./dev-install.sh -b
+      #   run: chmod +x dev-install.sh && ./dev-install.sh -b
 
       - name: Setup upterm session
         uses: lhotari/action-upterm@v1
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 3a48747..c3011ab 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -25,26 +25,12 @@ jobs:
         uses: actions/checkout@v2
 
       - name: "Setup TeX Live"
-        # ##
-        # uses: DanySK/setup-texlive-action@master
-        # with:
-        #   requirements-file: .github/texlive/packages.test.txt
-        ##
         uses: teatimeguest/setup-texlive-action@v1
         with:
           package-file: .github/texlive/packages.test.txt
-        # ##
-        # uses: paolobrasolin/setup-texlive-action@v1
-        # with:
-        #   packages-path: .github/texlive/packages.test.txt
 
       - name: "install tikz-trackschematic"
-        run: |
-          chmod +x dev-install.sh
-          ./dev-install.sh -b
+        run: chmod +x dev-install.sh && ./dev-install.sh -b
 
       - name: "test tikz-trackschematic"
-        run: |
-          cd test
-          chmod +x testing.sh
-          ./testing.sh
+        run: cd test && chmod +x testing.sh && ./testing.sh
diff --git a/dev-install.sh b/dev-install.sh
index 7ea5472..10f68cd 100755
--- a/dev-install.sh
+++ b/dev-install.sh
@@ -18,7 +18,7 @@ while getopts ":qb" opt; do
     q ) verbose=0
       ;;
     b ) batch_mode=1
-        verbose=0
+        # verbose=0
       ;;
     \? ) usage
          exit 1
@@ -37,9 +37,10 @@ DEVDIR="tex/latex/local/tikz-trackschematic-dev"
 check_texlive() {
   status=0
   command -v kpsewhich >/dev/null 2>&1 || status=1
+  command -v mktexlsr  >/dev/null 2>&1 || status=1
   if [ $status = 0 ]; then
-    if [ "$verbose" -eq 1 ]; then
-      echo "kpsewhich found"
+    if [ $verbose = 1 ]; then
+      echo "kpsewhich and mktexlsr found"
     fi
     return 0
   fi
@@ -54,14 +55,14 @@ check_sudo() {
   rootrun=""
   # If we are root, we do note require sudo
   if [ "$EUID"  = 0 ]; then
-    if [ "$verbose" -eq 1 ]; then
+    if [ $verbose = 1 ]; then
       echo "you are root"
     fi
     return 0
   fi
 
   if sudo -v >/dev/null 2>&1; then
-    if [ "$verbose" -eq 1 ]; then
+    if [ $verbose = 1 ]; then
       echo "sudo ok"
     fi
     rootrun="sudo"
@@ -83,12 +84,20 @@ check_sudo
 TEXMFLOCAL=$(kpsewhich --var-value TEXMFLOCAL)
 PROJECTDIR=$(pwd -P)
 
+if [ "`echo -n`" = "-n" ]; then
+  n=""
+  c="\c"
+else
+  n="-n"
+  c=""
+fi
+
 if [ "$batch_mode" -eq 0 ]; then
   echo ""
   echo "Do you wish to link this package from"
   echo "$PROJECTDIR/src to"
   echo "$TEXMFLOCAL/$DEVDIR?"
-  echo "(y/n)"
+  echo $n "(y/n) $c"
   while true; do
     read -p "" answer
     case $answer in
@@ -122,14 +131,14 @@ for SRC in src/*; do
 
   $rootrun ln -sfn $PROJECTDIR/$SRC $TEXMFLOCAL/$DEVDIR/$DST
 
-  if [ "$verbose" -eq 1 ]; then
+  if [ $verbose = 1 ]; then
     echo "linked '$DST'"
   fi
 done
 
 # update TeX Live installation
 TEXlsr=`which mktexlsr`
-if [ "$verbose" -eq 1 ]; then
+if [ $verbose = 1 ]; then
   $rootrun $TEXlsr
 else
   $rootrun $TEXlsr --quiet
diff --git a/test/testing.sh b/test/testing.sh
index 6b17e7a..7f2059a 100755
--- a/test/testing.sh
+++ b/test/testing.sh
@@ -22,6 +22,9 @@ while getopts ":q" opt; do
   esac
 done
 
+## -- variables
+TESTDIR="../test"
+
 ## -- commands
 
 check_tex_distro() {
@@ -29,7 +32,7 @@ check_tex_distro() {
   status=0
   command -v pdflatex >/dev/null 2>&1 || status=1
   if [ $status = 0 ]; then
-    if [ "$verbose" -eq 1 ]; then
+    if [ $verbose = 1 ]; then
       echo "pdflatex found"
     fi
     return 0
@@ -46,9 +49,9 @@ check_trackschematic() {
   TEXMFLOCAL=$(kpsewhich --var-value TEXMFLOCAL)
   DEVDIR="tex/latex/local/tikz-trackschematic-dev"
 
-  ls $TEXMFLOCAL/$DEVDIR/tikz-trackschematic.sty >> /dev/null 2>&1 || status=1
+  ls $TEXMFLOCAL/$DEVDIR/tikz-trackschematic-dev.sty >> /dev/null 2>&1 || status=1
   if [ $status = 0 ]; then
-    if [ "$verbose" -eq 1 ]; then
+    if [ $verbose = 1 ]; then
       echo "tikz-trackschematic-dev found"
     fi
     return 0
@@ -64,7 +67,7 @@ check_imagemagick() {
   status=0
   command -v compare >/dev/null 2>&1 || status=1
   if [ $status = 0 ]; then
-    if [ "$verbose" -eq 1 ]; then
+    if [ $verbose = 1 ]; then
       echo "compare found"
     fi
     return 0
@@ -75,25 +78,44 @@ check_imagemagick() {
   exit 1
 }
 
-#-------------------------------------------------------------------------------
+## -- checking system
 
 check_tex_distro
 check_trackschematic
 check_imagemagick
 
+if [ "`echo -n`" = "-n" ]; then
+  n=""
+  c="\c"
+else
+  n="-n"
+  c=""
+fi
+
+## -- doing the tests
+
 mkdir -p .testing
 
-for TEST in $1*.tex; do
-  if [ "$verbose" -eq 1 ]; then
-    echo "Testing: ${TEST%.*}"
+if [ $verbose = 1 ]; then
+  echo "==========="
+  echo "Comparison of the expected appearance with the freshly created."
+  echo "-----------"
+fi
+
+for TEST in `ls $TESTDIR/*.tex`; do
+  FILE=$(basename "$TEST") # remove path
+  NAME=${FILE%.*} # remove extension
+  if [ $verbose = 1 ]; then
+    echo $n "'$NAME' test: $c"
   fi
-  pdflatex -output-directory=.testing -interaction=batchmode -halt-on-error $TEST 2>&1 > /dev/null
-  compare -metric DSSIM -colorspace RGB .testing/${TEST%.*}.pdf ${TEST%.*}_expected.pdf .testing/${TEST%.*}_diff.png
-  if [ "$verbose" -eq 1 ]; then
-    echo "% difference"
+  pdflatex -output-directory=.testing -interaction=batchmode -halt-on-error $FILE 2>&1 > /dev/null
+  compare -metric DSSIM -colorspace RGB .testing/${NAME}.pdf ${NAME}_expected.pdf NULL:
+  if [ $verbose = 1 ]; then
+    echo "% difference." # it is actually not in percent! But it helps them humans...
   fi
 done
 
-if [ "$verbose" -eq 1 ]; then
+if [ $verbose = 1 ]; then
+  echo "-----------"
   echo "tests passed!"
 fi