diff --git a/test/build.bats b/test/build.bats
index f8bf93f9..924f7ac3 100644
--- a/test/build.bats
+++ b/test/build.bats
@@ -4,6 +4,7 @@ load test_helper
 export RUBY_BUILD_CACHE_PATH="$TMP/cache"
 export MAKE=make
 export MAKE_OPTS="-j 2"
+export CC=cc
 
 setup() {
   mkdir -p "$INSTALL_ROOT"