diff --git a/fancycompleter.py b/fancycompleter.py
index ae8cf26..0f7e2af 100644
--- a/fancycompleter.py
+++ b/fancycompleter.py
@@ -351,11 +351,11 @@ def has_leopard_libedit(config):
     return config.readline.__doc__ and 'libedit' in config.readline.__doc__
 
 
-def setup():
+def setup(**kwargs):
     """
     Install fancycompleter as the default completer for readline.
     """
-    completer = Completer()
+    completer = Completer(**kwargs)
     readline = completer.config.readline
     if has_leopard_libedit(completer.config):
         readline.parse_and_bind("bind ^I rl_complete")
@@ -390,7 +390,7 @@ def save_history():
     atexit.register(save_history)
 
 
-def interact(persist_history=None):
+def interact(persist_history=None, **kwargs):
     """
     Main entry point for fancycompleter: run an interactive Python session
     after installing fancycompleter.
@@ -411,7 +411,7 @@ def interact(persist_history=None):
     By default, pyrepl is preferred and automatically used if found.
     """
     import sys
-    completer = setup()
+    completer = setup(**kwargs)
     if persist_history:
         setup_history(completer, persist_history)
     if completer.config.using_pyrepl and '__pypy__' not in sys.builtin_module_names:
diff --git a/testing/fcomplete.py b/testing/fcomplete.py
new file mode 100644
index 0000000..b5b7997
--- /dev/null
+++ b/testing/fcomplete.py
@@ -0,0 +1,24 @@
+import cmd
+import sys
+
+from fancycompleter import interact, DefaultConfig
+
+
+class ConfigForTest(DefaultConfig):
+    use_colors = False
+
+
+class CompleterCmd(cmd.Cmd):
+    prompt = ''
+
+
+if __name__ == '__main__':
+    globals().update({
+        name: name
+        for name in sys.argv[1:]
+    })
+
+    interact(Config=ConfigForTest)
+
+    repl = CompleterCmd(completekey=None)
+    repl.cmdloop(intro='')
diff --git a/testing/test_interactive.py b/testing/test_interactive.py
new file mode 100644
index 0000000..9e5f743
--- /dev/null
+++ b/testing/test_interactive.py
@@ -0,0 +1,42 @@
+import os.path
+import time
+
+import pexpect
+
+
+TEST_DIR = os.path.dirname(__file__)
+FCOMPLETE_PATH = os.path.join(TEST_DIR, 'fcomplete.py')
+
+
+def test_global_matches():
+    prefix = 'complete_'
+    names = ['a', 'b', 'c']
+    full_names = [prefix + name for name in names]
+
+    args = [FCOMPLETE_PATH]
+    args.extend(full_names)
+
+    fcomplete = pexpect.spawn('python', args)
+
+    try:
+        fcomplete.send(prefix)
+        output = fcomplete.read_nonblocking(1000).decode('utf-8')
+        assert output == prefix
+
+        fcomplete.send('\t')
+        fcomplete.read_nonblocking(1000).decode('utf-8')
+
+        fcomplete.send('\t')
+        time.sleep(0.1)
+        output = fcomplete.read_nonblocking(1000).decode('utf-8')
+        lines = output.split('\r\n')
+
+        assert len(lines) == 3
+        assert lines[2].endswith(prefix)
+
+        assert all(full_name in lines[1] for full_name in full_names)
+        completed_names = lines[1].strip().split('  ')
+        assert set(completed_names) == set(full_names)
+
+    finally:
+        fcomplete.terminate(force=True)
diff --git a/tox.ini b/tox.ini
index 82a5a7f..50f35d1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,6 +4,7 @@ envlist = py{27,34,35,36,37,38,py,py3}, checkqa
 [testenv]
 deps =
     pytest
+    pexpect
     coverage: pytest-cov
 commands = pytest {posargs}
 setenv =