Document minimum phpunit version

diff --git a/docs/admin/Installation.md b/docs/admin/Installation.md
index 0dd6579b98cb1fa734e22d66d898a6486993eceb..691a22b3f1a084b54acc9ec6ed719eb6aa1c733d 100644 (file)
--- a/docs/admin/Installation.md
+++ b/docs/admin/Installation.md
@@ -56,7 +56,7 @@ For running tests:
 
   * [behave](http://pythonhosted.org/behave/)
   * [nose](https://nose.readthedocs.io)
-  * [phpunit](https://phpunit.de)
+  * [phpunit](https://phpunit.de) >= 7.3
 
 ### Hardware