pass LANG variable to the test environment

3 files changed, 8 insertions, 1 deletions

diff --git a/CHANGELOG b/CHANGELOG
index 8c1b59d..003f386 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,9 @@
+unreleased
+----------
+
+- tox now passes the LANG variable from the tox invocation environment to the
+  test environment.
+
 2.0.1
 -----------
 
diff --git a/tests/test_config.py b/tests/test_config.py
index 526a795..1d91ace 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -716,6 +716,7 @@ class TestConfigTestEnv:
             assert "TMPDIR" in envconfig.passenv
         assert "PATH" in envconfig.passenv
         assert "PIP_INDEX_URL" in envconfig.passenv
+        assert "LANG" in envconfig.passenv
         assert "A123A" in envconfig.passenv
         assert "A123B" in envconfig.passenv
 
diff --git a/tox/config.py b/tox/config.py
index 5963f13..a5be23c 100644
--- a/tox/config.py
+++ b/tox/config.py
@@ -387,7 +387,7 @@ def tox_addoption(parser):
         help="list of X=Y lines with environment variable settings")
 
     def passenv(testenv_config, value):
-        passenv = set(["PATH", "PIP_INDEX_URL"])
+        passenv = set(["PATH", "PIP_INDEX_URL", "LANG"])
 
         # we ensure that tmp directory settings are passed on
         # we could also set it to the per-venv "envtmpdir"