diff --git a/README.md b/README.md
index 79e8f2d..7334cf9 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,8 @@ You're now on the new branch `my_pretty_branch_for_pr_1` and ready to work!
 
 Find the file you want to modify and modify it. Change the code, etc... I won't detail here how to run the test suite as it's optional in open source projects. Especially if the modification is small. A server will run some tests for you anyway. So let's go on.
 
+[longnn] I modified this readme for testing purpose.
+
 ### Step 5: Push your branch
 
 This is quite simple:
@@ -125,6 +127,8 @@ There are nowadays many CI providers: Travis CI, CircleCI, Azure pilelines, Gith
 
 ### Step 8 (optional): Add more commits to your pull request
 
+[longnn] Some more edit
+
 The pull request is now done, but there is still the code review. You might need to wait for a few days until a maintainer reviews your code. 
 
 Once the maintainer does, if everything is good, you'll get some thanks and your pull request will be merged.
diff --git a/longnn.txt b/longnn.txt
new file mode 100644
index 0000000..6769dd6
--- /dev/null
+++ b/longnn.txt
@@ -0,0 +1 @@
+Hello world!
\ No newline at end of file