diff --git a/tox.ini b/tox.ini
index 64245dcb7a..38e397711d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -54,14 +54,15 @@ passenv =
     PGPASSWORD
     WORKSPACE
     DISPLAY
+    PATH
 allowlist_externals =
                       sh
                       sed
                       mkdir
                       chmod
                       pwd
-		      ls
-		      echo
+                      ls
+                      which
 
 usedevelop = true
 commands_pre =
@@ -71,7 +72,9 @@ commands_pre =
 commands =
          {unit,integration,functional}: pwd
          {unit,integration,functional}: ls
+         {unit,integration,functional}: which python3
          {unit,integration,functional}: python3 -c "import sys; print('PYTHONPATH:', sys.path)"
+         {unit,integration,functional}: python3 -c "import os; print('PATH:', os.environ.get('PATH'))"
 
          unit: pytest -o junit_suite_name="{envname} unit tests" --cov-config {toxinidir}/tests/.coveragerc --cov={toxinidir}/python --cov-report=xml:reports/{envname}/coverage.xml --junitxml=reports/{envname}/unit-results.xml --verbose {posargs:tests/unittests}