diff --git a/.travis.yml b/.travis.yml
index 83b4593..641df12 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,7 @@ python:
   - "3.4"
 
 before_install:
-  - pip install codecov
+  - pip install -r test-requirements.txt
 
 script:
   - coverage run tests.py
diff --git a/modoboa_installer/utils.py b/modoboa_installer/utils.py
index 5368521..5cd2897 100644
--- a/modoboa_installer/utils.py
+++ b/modoboa_installer/utils.py
@@ -249,16 +249,17 @@ def get_entry_value(entry, interactive):
     user_value = None
     if entry.get("customizable") and interactive:
         while (user_value != '' and not validate(user_value, entry)):
-            print(entry.get("question"))
+            question = entry.get("question")
             if entry.get("values"):
-                print("Please choose from the list")
+                question += " from the list"
                 values = entry.get("values")
                 for index, value in enumerate(values):
-                    print("{}   {}".format(index, value))
+                    question += "\n{}   {}".format(index, value)
+            print(question)
             print("default is <{}>".format(default_value))
-            user_value = user_input("->")
+            user_value = user_input("-> ")
 
-        if entry.get("values") and user_value != '':
+        if entry.get("values") and user_value != "":
             user_value = values[int(user_value)]
     return user_value if user_value else default_value
 
diff --git a/test-requirements.txt b/test-requirements.txt
new file mode 100644
index 0000000..6ec2cdd
--- /dev/null
+++ b/test-requirements.txt
@@ -0,0 +1,2 @@
+codecov
+mock
diff --git a/tests.py b/tests.py
index b7d9845..247ab47 100644
--- a/tests.py
+++ b/tests.py
@@ -1,10 +1,20 @@
 """Installer unit tests."""
 
+try:
+    import configparser
+except ImportError:
+    import ConfigParser as configparser
 import os
 import shutil
+import sys
 import tempfile
 import unittest
 
+try:
+    from unittest.mock import patch
+except ImportError:
+    from mock import patch
+
 import run
 
 
@@ -28,6 +38,25 @@ class ConfigFileTestCase(unittest.TestCase):
             "example.test"])
         self.assertTrue(os.path.exists(self.cfgfile))
 
+    @patch("modoboa_installer.utils.user_input")
+    def test_interactive_mode(self, mock_user_input):
+        """Check interactive mode."""
+        mock_user_input.side_effect = [
+            "0", "0", "", "", "", ""
+        ]
+        with open(os.devnull, "w") as fp:
+            sys.stdout = fp
+            run.main([
+                "--stop-after-configfile-check",
+                "--configfile", self.cfgfile,
+                "--interactive",
+                "example.test"])
+        self.assertTrue(os.path.exists(self.cfgfile))
+        config = configparser.ConfigParser()
+        config.read(self.cfgfile)
+        self.assertEqual(config.get("certificate", "type"), "self-signed")
+        self.assertEqual(config.get("database", "engine"), "postgres")
+
 
 if __name__ == "__main__":
     unittest.main()