diff --git a/src/pyflask/tests/conftest.py b/src/pyflask/tests/conftest.py
index 0a19565fa..c585a7124 100644
--- a/src/pyflask/tests/conftest.py
+++ b/src/pyflask/tests/conftest.py
@@ -3,7 +3,7 @@
 
 
 def pytest_addoption(parser):
-    parser.addoption("--target", action="store", help="Run the executable instead of the standard Flask flask_app")
+    parser.addoption("--target", action="store", help="Run the executable instead of the standard Flask app.")
 
 
 @pytest.fixture(scope="session")