diff --git a/podman/testdata/testscript.sh b/podman/testdata/testscript.sh
index a5b1b2f..4e191b9 100755
--- a/podman/testdata/testscript.sh
+++ b/podman/testdata/testscript.sh
@@ -3,6 +3,10 @@
 set -e 
 git clone /data/git git
 cd git
-#python3 -m pytest --workers auto
-python3 -m pytest -x
+
+if [ $# -ge 1 -a "$1" = "--parallel" ]; then
+    python3 -m pytest --workers auto
+else
+    python3 -m pytest -x
+fi
 
diff --git a/run-tests.sh b/run-tests.sh
index 50af316..76be006 100755
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -1,6 +1,7 @@
 #!/bin/sh
 
 set -e
+CONTAINER_ARGS="$@"
 
 rm -rf podman/testdata/git
 git clone --depth 1 . podman/testdata/git
@@ -9,6 +10,6 @@ for distro in arch ubuntu
 do
     podman build -t gerbonara-$distro-testenv -f podman/$distro-testenv
     mkdir -p /tmp/gerbonara-test-out
-    podman run --mount type=bind,src=podman/testdata,dst=/data,ro --mount type=bind,src=/tmp/gerbonara-test-out,dst=/out gerbonara-$distro-testenv /data/testscript.sh
+    podman run --mount type=bind,src=podman/testdata,dst=/data,ro --mount type=bind,src=/tmp/gerbonara-test-out,dst=/out gerbonara-$distro-testenv /data/testscript.sh $CONTAINER_ARGS
 done