1 files changed, 5 insertions, 0 deletions
diff --git a/tox.ini b/tox.ini
index 88fbbd68..3b1e56dc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -32,6 +32,9 @@ setenv =
     jython: COVERAGE_NO_CTRACER=no C extension under Jython
     jython: PYTEST_ADDOPTS=-n 0
 
+whitelist_externals =
+    env
+
 commands =
     python setup.py --quiet clean develop
 
@@ -47,6 +50,8 @@ commands =
     python setup.py --quiet build_ext --inplace
     python igor.py test_with_tracer c {posargs}
 
+    env PYTHONNOOPT=1 python igor.py test_with_tracer c {posargs}
+
 [testenv:py39]
 basepython = python3.9