diff --git a/ShellB3/shallbethree.sh b/ShellB3/shallbethree.sh
index cc8dd271517f1f3bf3a823ceb30c5114a3132012..4684b6f8b6460cd66878840016f9fc19a952e28e 100755
--- a/ShellB3/shallbethree.sh
+++ b/ShellB3/shallbethree.sh
@@ -2981,6 +2981,7 @@ mk_cblosc() {
   make_script c-blosc <<SCRIPT
 mkdir sb3_build 
 echo -n > sb3_build/CMakeCache.txt
+echo BUILD_TESTS:BOOL=OFF >> sb3_build/CMakeCache.txt
 if isLinux ; then
   #this should take a -DDEACTIVATE_AVX2:BOOL=ON , but it sucks
 echo DEACTIVATE_AVX2:BOOL=ON >> sb3_build/CMakeCache.txt