diff --git a/phlop/run/test_cases.py b/phlop/run/test_cases.py
index 8e7c81f..1e24637 100644
--- a/phlop/run/test_cases.py
+++ b/phlop/run/test_cases.py
@@ -74,7 +74,8 @@ def get_test_cases(cli_args):
             classes_in_directory(cli_args.dir, unittest.TestCase),
             test_cmd_pre=cli_args.prefix,
             test_cmd_post=cli_args.postfix,
-        )
+        ),
+        1,
     )
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 7e3c34e..73edf71 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "phlop"
-version = "0.0.10"
+version = "0.0.11"
 
 dependencies = [
 
diff --git a/setup.py b/setup.py
index bff2dae..944dd1b 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@
 
 setup(
     name="phlop",
-    version="0.0.10",
+    version="0.0.11",
     cmdclass={},
     classifiers=[],
     include_package_data=True,
diff --git a/sh/test.sh b/sh/test.sh
index 16e8e6a..5710a75 100755
--- a/sh/test.sh
+++ b/sh/test.sh
@@ -5,5 +5,6 @@ cd "$CWD"/..
 
 set -ex
 
-PYTHONPATH=$PWD python3 -m phlop.run.test_cases -d tests -p
-PYTHONPATH=$PWD python3 -m phlop.run.test_cases -d tests -c 10
+PYTHONPATH=$PWD python3 -Om phlop.run.test_cases -d tests -p
+PYTHONPATH=$PWD python3 -Om phlop.run.test_cases -d tests -c 10
+PYTHONPATH=$PWD python3 -O tests/all_concurrent.py