diff --git a/tests/kokoro/gcp_windows/continuous.bat b/tests/kokoro/gcp_windows/continuous.bat
index 930dae8..3bd632c 100644
--- a/tests/kokoro/gcp_windows/continuous.bat
+++ b/tests/kokoro/gcp_windows/continuous.bat
@@ -12,8 +12,10 @@
 
 cd %SRC%\build || goto :error
 
-REM Update CMake
-choco upgrade cmake -y --limit-output --no-progress
+REM The currently used OS image comes with CMake 3.17.3. If a newer version is
+REM required one can update the image (go/radial/kokoro_windows_image), or
+REM uncomment the line below.
+REM choco upgrade cmake -y --limit-output --no-progress
 cmake --version
 
 cmake .. ^