diff --git a/tests/test_config.py b/tests/test_config.py
index 7487cb1d..edfe43cc 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -182,3 +182,11 @@ def test_get_namespace():
     assert 2 == len(bar_options)
     assert 'bar stuff 1' == bar_options['STUFF_1']
     assert 'bar stuff 2' == bar_options['STUFF_2']
+    foo_options = app.config.get_namespace('FOO_', trim_namespace=False)
+    assert 2 == len(foo_options)
+    assert 'foo option 1' == foo_options['foo_option_1']
+    assert 'foo option 2' == foo_options['foo_option_2']
+    bar_options = app.config.get_namespace('BAR_', lowercase=False, trim_namespace=False)
+    assert 2 == len(bar_options)
+    assert 'bar stuff 1' == bar_options['BAR_STUFF_1']
+    assert 'bar stuff 2' == bar_options['BAR_STUFF_2']