diff --git a/source/upgrade.txt b/source/upgrade.txt
index 5707522..8ab4b07 100644
--- a/source/upgrade.txt
+++ b/source/upgrade.txt
@@ -258,6 +258,10 @@ The v3.11 driver introduces the following breaking changes to the ABI:
   MSVC. This is an ABI breaking change if you use an alternative
   default calling convention when building projects.
 
+- If the ``ENABLE_TESTS`` variable is set to ``ON`` while building tests in CMake,
+  the compiler must be updated to C++14. Users can opt out of the C++14 requirement
+  by disabling tests with ``ENABLE_TESTS=OFF{`` during CMake configuration.
+
 .. _version-3.10-breaking-changes:
 
 Version 3.10