diff --git a/bits b/bits
index fbb8d5dd..6690dd50 100755
--- a/bits
+++ b/bits
@@ -223,6 +223,9 @@ do
         $BITSDIR/bitsBuild $@
 	    exit $?
         ;;
+    setenv)
+	break
+	;;
 	 *)
 	    shift
         ;;
@@ -277,7 +280,7 @@ do
       --help|help)
 	  printHelp; exit 0 ;;
       -c) 
-	  i+=1; COMMAND_IN_ENV=("$@");
+	  i=$((i+1)); COMMAND_IN_ENV=("${ARGV[@]:${i}}");
 	  break ;;
       *)
 	  ARGS+=(${ARGV[$i]});;
diff --git a/tests/test_deps.py b/tests/test_deps.py
index ec5d77e5..4a272607 100644
--- a/tests/test_deps.py
+++ b/tests/test_deps.py
@@ -66,13 +66,9 @@ def depsOpen(fn, mode):
                          outgraph="/tmp/outgraph.pdf",
                          package="AliRoot",
                          defaults="release",
-                         environment=[])
-        def fake_exists(n):
-            return {"/alidist/aliroot.sh": True}
-        with patch.object(os.path, "exists", fake_exists):
-            doDeps(args, MagicMock())
-                         xdefaults=None)
-
+                         environment=[],
+                         xdefaults=None,
+                         )
 
         def fake_exists(n):
             return True if n in RECIPES else False
diff --git a/tests/test_doctor.py b/tests/test_doctor.py
index ea5aa74f..181285f2 100644
--- a/tests/test_doctor.py
+++ b/tests/test_doctor.py
@@ -91,8 +91,9 @@ def resetOut():
                      architecture="osx_x86-64",
                      disable=[],
                      defaults="release",
-                     environment=[])
-                     xdefaults=None)
+                     environment=[],
+                     xdefaults=None,
+                     )
 
     # What to call (longer names deprecated in Python 3.5+)
     if not hasattr(self, "assertRegex"):
diff --git a/tests/test_init.py b/tests/test_init.py
index 0522188f..341b7861 100644
--- a/tests/test_init.py
+++ b/tests/test_init.py
@@ -49,7 +49,7 @@ def test_doDryRunInit(self, mock_os, mock_path,  mock_info) -> None:
         fetchRepos = False,
         architecture = "slc7_x86-64",
         environment = {},
-        xdefaults = None
+        xdefaults = None,
       )
       self.assertRaises(SystemExit, doInit, args)
       self.assertEqual(mock_info.mock_calls, [call('This will initialise local checkouts for %s\n--dry-run / -n specified. Doing nothing.', 'zlib,AliRoot')])
@@ -90,7 +90,7 @@ def test_doRealInit(self, mock_read_defaults, mock_open, mock_update_reference,
         fetchRepos = False,
         architecture = "slc7_x86-64",
         environment = {},
-        xdefaults = None
+        xdefaults = None,
       )
       doInit(args)
       self.assertEqual(mock_git.mock_calls, CLONE_EVERYTHING)
diff --git a/tox.ini b/tox.ini
index fbeef159..e2cdc813 100644
--- a/tox.ini
+++ b/tox.ini
@@ -21,6 +21,8 @@ python =
 ; allowlist_externals =
 ;     find
 ; deps =
+;     bison
+;     flex
 ;     flake8
 ;     pylint
 ; changedir = {toxinidir}