diff --git a/.gitignore b/.gitignore
index 4e98b9f1d..3fac8c83f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,3 +38,5 @@ include/
 
 # Editor project files
 *.komodo*
+
+.coverage
diff --git a/tests/test_main.py b/tests/test_main.py
index d6890f56b..3480526af 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -6,7 +6,7 @@ import builtins
 from unittest.mock import patch
 
 import nose
-from nose.tools import assert_true, assert_false
+from nose.tools import assert_true, assert_false, assert_equal
 
 import xonsh.main
 
@@ -23,6 +23,10 @@ def test_premain():
         xonsh.main.premain([])
         assert_true(builtins.__xonsh_env__.get('XONSH_LOGIN'))
 
+    with patch('xonsh.main.Shell', Shell), mock_xonsh_env({}):
+        xonsh.main.premain(['-i'])
+        assert_true(builtins.__xonsh_env__.get('XONSH_INTERACTIVE'))
+
     with patch('xonsh.main.Shell', Shell), mock_xonsh_env({}):
         xonsh.main.premain(['-l', '-c', 'echo "hi"'])
         assert_true(builtins.__xonsh_env__.get('XONSH_LOGIN'))
@@ -35,6 +39,11 @@ def test_premain():
         xonsh.main.premain(['-l'])
         assert_true(builtins.__xonsh_env__.get('XONSH_LOGIN'))
 
+    with patch('xonsh.main.Shell', Shell), mock_xonsh_env({}):
+        xonsh.main.premain(['-DTEST1=1616', '-DTEST2=LOL'])
+        assert_equal(builtins.__xonsh_env__.get('TEST1'), '1616')
+        assert_equal(builtins.__xonsh_env__.get('TEST2'), 'LOL')
+
 
 def test_premain_with_file_argument():
     with patch('xonsh.main.Shell', Shell), mock_xonsh_env({}):