diff --git a/23_flask_session_test.py b/23_flask_session_test.py
new file mode 100644
index 0000000..9142760
--- /dev/null
+++ b/23_flask_session_test.py
@@ -0,0 +1,21 @@
+import sys
+from flask import Flask, session, url_for, redirect
+
+app = Flask(__name__)
+app.secret_key = 'secret'
+
+
+@app.route('/')
+def set():
+    session.clear()
+    session['works'] = True
+    return redirect(url_for('get'))
+
+
+@app.route('/get')
+def get():
+    works = session.get('works', False)
+    return str(works)
+
+
+app.run(sys.argv[1], use_reloader=False)
diff --git a/readme.md b/readme.md
index 711370b..2e3022d 100644
--- a/readme.md
+++ b/readme.md
@@ -21,4 +21,5 @@
 1. **19_tsv-to-csv.py**: Convert TSV to CSV
 1. **20_restore_file_from_git.py**: Restore file from Git History
 1. **21_twitter_bot.py**: Twitter Bot
-1. **22_git_tag.py**: Create Git Tag based on a commit
\ No newline at end of file
+1. **22_git_tag.py**: Create Git Tag based on a commit
+1. **23_flask_session_test.py**: Just a simple app to see if the sessions are working.
\ No newline at end of file