diff --git a/tests/How-To-Run-Test-And-How-To-Add-New-Test-Case.md b/tests/How-To-Run-Test-And-How-To-Add-New-Test-Case.md
index 7c42d47d1b9c95a863539e3dbe1f4b94abf6c753..b285fe815596a55d8e6689aeab1401f4388e94ec 100644
--- a/tests/How-To-Run-Test-And-How-To-Add-New-Test-Case.md
+++ b/tests/How-To-Run-Test-And-How-To-Add-New-Test-Case.md
@@ -11,6 +11,19 @@
4. pip install src/connector/python/linux/python2 ; pip3 install
src/connector/python/linux/python3
+> Note: Both Python2 and Python3 are currently supported by the Python test
+> framework. Since Python2 is no longer officially supported by Python Software
+> Foundation since January 1, 2020, it is recommended that subsequent test case
+> development be guaranteed to run correctly on Python3.
+
+> For Python2, please consider being compatible if appropriate without
+> additional burden.
+>
+> If you use some new Linux distribution like Ubuntu 20.04 which already do not
+> include Python2, please do not install Python2-related packages.
+>
+>
+
### How to run Python test suite
1. cd \/tests/pytest
@@ -211,13 +224,6 @@ def checkAffectedRows(self, expectAffectedRows):
...
-> Note: Both Python2 and Python3 are currently supported by the Python test
-> case. Since Python2 is no longer officially supported by January 1, 2020, it
-> is recommended that subsequent test case development be guaranteed to run
-> correctly on Python3. For Python2, please consider being compatible if
-> appropriate without additional
-> burden.
-
### CI submission adoption principle.
- Every commit / PR compilation must pass. Currently, the warning is treated