diff --git a/tests/system/README b/tests/system/README
index 8f4330ae7f1..65adf14daac 100644
--- a/tests/system/README
+++ b/tests/system/README
@@ -26,7 +26,7 @@ This folder must contain the following:
 Fifth - you'll have to make sure that some needed tools are available (no matter on which OS you're on).
  * qmake
  * cmake
- * wget or curl
+ * wget or curl, capable of HTTPS
 Normally it should be okay to just install them as usual and add their executables' path(s) to the PATH variable.