Update install.sh

src/install.sh

@@ -650,6 +650,11 @@ extractImage() {
   local desc="local ISO"
   local file size
 
+  if enabled "${ISO_TEST:-}" && ! enabled "${UNPACK:-}"; then
+    extractModernImage "$iso" "$dir" "$version"
+    return $?
+  fi
+
   if [ -z "$CUSTOM" ]; then
     desc="downloaded ISO"
     if [[ "$version" != "http"* ]]; then
@@ -1376,16 +1381,9 @@ fi
 
 DIR="$TMP/unpack"
 
-if enabled "${ISO_TEST:-}"; then
-  if ! extractModernImage "$ISO" "$DIR" "$VERSION"; then
-    rm -f "$ISO" 2> /dev/null || true
-    exit 62
-  fi
-else
-  if ! extractImage "$ISO" "$DIR" "$VERSION"; then
-    rm -f "$ISO" 2> /dev/null || true
-    exit 62
-  fi
+if ! extractImage "$ISO" "$DIR" "$VERSION"; then
+  rm -f "$ISO" 2> /dev/null || true
+  exit 62
 fi
 
 if ! detectImage "$DIR" "$VERSION"; then