2 files changed, 9 insertions, 0 deletions
diff --git a/igor.py b/igor.py
index f9c7ad92..5989c11b 100644
--- a/igor.py
+++ b/igor.py
@@ -38,6 +38,13 @@ def ignore_warnings():
 # by "python igor.py blah".
 
 
+def do_show_env():
+    """Show the environment variables."""
+    print("Environment:")
+    for env in sorted(os.environ):
+        print("  %s = %r" % (env, os.environ[env]))
+
+
 def do_remove_extension():
     """Remove the compiled C extension, no matter what its name."""
 
diff --git a/tox.ini b/tox.ini
index 9053db1a..4b5e75b8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,6 +7,8 @@ skip_missing_interpreters = True
 
 [testenv]
 commands =
+    python -c "import sys; print(sys.executable)"
+    python igor.py show_env
     python setup.py --quiet clean develop
 
     # Create tests/zipmods.zip