diff --git a/regtest/common.bash b/regtest/common.bash
index a3536c8..8d2a404 100644
--- a/regtest/common.bash
+++ b/regtest/common.bash
@@ -6,6 +6,7 @@ SETVERSION="0.80"
 DATABASE=./database
 RNDSEQ="./fixed-random-sequence"
 
+NON_EXISTENT_DEVICE=/dev/sdz
 ISODIR=/var/tmp/regtest
 if ! test -d $ISODIR; then
     echo "$ISODIR does not exist."
@@ -29,8 +30,16 @@ fi
 
 # Assemble sed expressions for removal of variable output contents
 
-SED_REMOVE_ISO_DIR=$(echo "${ISODIR}/" | sed -e "s/\//\\\\\//g")
-SED_REMOVE_DEV_SHM=$(echo "/dev/shm/"  | sed -e "s/\//\\\\\//g")
+SED_REMOVE_ISO_DIR="([a-zA-Z]:/[a-zA-Z0-9/]+)?${ISODIR}/"
+
+# For MSYS2
+
+if [ -n "$ORIGINAL_TEMP" ]; then
+    ISODIR="$ORIGINAL_TEMP"
+    # /c/ => C:/
+    SED_REMOVE_ISO_DIR="$(echo "$ISODIR" | cut -c2 | tr a-z A-Z):$(echo "$ISODIR" | cut -c3-)/"
+    NON_EXISTENT_DEVICE=V:
+fi
 
 # Usage
 
@@ -196,20 +205,20 @@ function run_regtest()
      # ignore the memory tracker line when no memory leaks
      # have been found
      
-     grep -v "dvdisaster: No memory leaks found." $NEWLOG >$TMPLOG
+     grep -va "dvdisaster: No memory leaks found." $NEWLOG >$TMPLOG
      mv $TMPLOG $NEWLOG
      
      # ignore log lines specified by user
      
      if test -n "$IGNORE_LOG_LINE"; then
-	 egrep -v "$IGNORE_LOG_LINE" $NEWLOG >$TMPLOG
+	 grep -Eva "$IGNORE_LOG_LINE" $NEWLOG >$TMPLOG
 	 mv $TMPLOG $NEWLOG
      fi
 
      filter=cat
      echo "$options" | grep -qw SORTED && filter=sort
        
-     if ! diff <(tail -n +3 $REFLOG | $filter) <(sed -e "s/${SED_REMOVE_ISO_DIR}//g" $NEWLOG | $filter) >${DIFFLOG}; then
+     if ! diff <(tail -n +3 $REFLOG | $filter) <(sed -re "s=${SED_REMOVE_ISO_DIR}==g" $NEWLOG | $filter) >${DIFFLOG}; then
 	 printf "%b\r%b\n" "BAD; diffs found (<expected; >created):" "[\e[31m✘\e[0m]"
 	 cat ${DIFFLOG}
 
@@ -220,7 +229,7 @@ function run_regtest()
 	   if test "$answer" == "a"; then
 	       cp $REFLOG $LOGDIR
 	       head -n 2 $LOGDIR/${CODEC_PREFIX}_${testsymbol} >$REFLOG 
-	       sed -e "s/${SED_REMOVE_ISO_DIR}//g" $NEWLOG >>$REFLOG
+	       sed -e "s=${SED_REMOVE_ISO_DIR}==g" $NEWLOG >>$REFLOG
 	       pass="skip"
 	   else
 	       pass="false"
diff --git a/regtest/rs01.bash b/regtest/rs01.bash
index 4f6ba91..497efff 100755
--- a/regtest/rs01.bash
+++ b/regtest/rs01.bash
@@ -659,7 +659,7 @@ fi
 
 if try "scanning image, device not existant" scan_no_device; then
 
-  extra_args="--debug -d /dev/sdz --sim-cd=$MASTERISO --fixed-speed-values"
+  extra_args="--debug -d $NON_EXISTENT_DEVICE --sim-cd=$MASTERISO --fixed-speed-values"
   run_regtest scan_no_device "--spinup-delay=0 -s" $ISODIR/no.iso  $ISODIR/no.ecc
 fi
 
@@ -946,7 +946,7 @@ fi
 
 if try "reading image, device not existant" read_no_device; then
 
-  run_regtest read_no_device "--debug --sim-cd=$MASTERISO --fixed-speed-values --spinup-delay=0 -d /dev/sdz -r" $TMPISO  $ISODIR/no.ecc
+  run_regtest read_no_device "--debug --sim-cd=$MASTERISO --fixed-speed-values --spinup-delay=0 -d $NON_EXISTENT_DEVICE -r" $TMPISO  $ISODIR/no.ecc
 fi
 
 # Read image from device with insufficient permissions
@@ -1499,7 +1499,7 @@ fi
 
 if try "reading image, device not existant" adaptive_no_device; then
 
-  run_regtest adaptive_no_device "--debug --sim-cd=$MASTERISO --fixed-speed-values --spinup-delay=0 -d /dev/sdz -r --adaptive-read" $TMPISO  $ISODIR/no.ecc
+  run_regtest adaptive_no_device "--debug --sim-cd=$MASTERISO --fixed-speed-values --spinup-delay=0 -d $NON_EXISTENT_DEVICE -r --adaptive-read" $TMPISO  $ISODIR/no.ecc
 fi
 
 # Read image from device with insufficient permissions
@@ -1785,3 +1785,5 @@ if try "reading medium containing dead sector markers" adaptive_medium_with_dsm;
 
   run_regtest adaptive_medium_with_dsm "--debug --sim-cd=$SIMISO --fixed-speed-values --spinup-delay=0 -r --adaptive-read" $TMPISO  $ISODIR/no.ecc
 fi
+
+exit $nbfailed
diff --git a/regtest/rs02.bash b/regtest/rs02.bash
index ccfbbe6..0140f96 100755
--- a/regtest/rs02.bash
+++ b/regtest/rs02.bash
@@ -2139,3 +2139,4 @@ if try "reading RS02 image with non-matching RS03 ecc file" read_with_wrong_rs03
     run_regtest read_with_wrong_rs03_file "--debug --sim-cd=$SIMISO --fixed-speed-values --spinup-delay=0 -r" $TMPISO $TMPECC
 fi
 
+exit $nbfailed
diff --git a/regtest/rs03f.bash b/regtest/rs03f.bash
index 1dd7ff9..9a5d95d 100755
--- a/regtest/rs03f.bash
+++ b/regtest/rs03f.bash
@@ -1493,3 +1493,5 @@ fi
 ### Reading tests (adaptive)
 
 REGTEST_SECTION="Reading tests (adaptive)"
+
+exit $nbfailed
diff --git a/regtest/rs03i.bash b/regtest/rs03i.bash
index 7497c2b..8fecfea 100755
--- a/regtest/rs03i.bash
+++ b/regtest/rs03i.bash
@@ -2070,3 +2070,5 @@ fi
 ### Reading tests (adaptive)
 
 REGTEST_SECTION="Reading tests (adaptive)"
+
+exit $nbfailed