diff --git a/tests/pkg_cmsis-nn/Makefile b/tests/pkg_cmsis-nn/Makefile
index 0cb3bcad8a..6b3dbc4f00 100644
--- a/tests/pkg_cmsis-nn/Makefile
+++ b/tests/pkg_cmsis-nn/Makefile
@@ -6,8 +6,9 @@ USEPKG += cmsis-nn
 BLOBS += input
 
 # Boards that were tested and are known to work
-# This package only works with Cortex M3, M4 and M7 CPUs but there's no easy
-# way provided by the build system to filter them at that level
+#
+# This package only works with Cortex M23, M3, M33, M4 and M7 CPUs, but there
+# is no easy way provided by the build system to filter them at that level
 # (cpu_core_cortexm is the only feature available) for the moment.
 BOARD_WHITELIST := \
   b-l475e-iot01a \