diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 77e2e47..790af5b 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -134,6 +134,7 @@
 cleanup
 cp "$CONFIG_H" "$CONFIG_BAK"
 scripts/config.pl unset POLARSSL_AESNI_C # memsan doesn't grok asm
+scripts/config.pl set POLARSSL_NO_PLATFORM_ENTROPY # memsan vs getrandom()
 CC=clang cmake -D CMAKE_BUILD_TYPE:String=MemSan .
 make