diff --git a/scripts/sanity.sh b/scripts/sanity.sh
index a9c210ae..d01422a8 100755
--- a/scripts/sanity.sh
+++ b/scripts/sanity.sh
@@ -2,15 +2,24 @@
 
 set -eu
 
-# check linux tests
-
+printf "=> Checking linux tests... "
 FIRST_OUT="$(git status --porcelain)"
 ruby scripts/generate_linux_tests.rb > /dev/null
 SECOND_OUT="$(git status --porcelain)"
 if [[ "$FIRST_OUT" != "$SECOND_OUT" ]]; then
-  printf "\033[0;31mMissing linux test changes!\033[0m\n"
+  printf "\033[0;31mmissing changes!\033[0m\n"
   git --no-pager diff
   exit 1
 else
-  printf "\033[0;32mLinux tests okay\033[0m\n"
+  printf "\033[0;32mokay.\033[0m\n"
+fi
+
+printf "=> Checking license headers... "
+NON_LICENSED_FILES="$(grep --include=\*.swift --exclude-dir=.build -rL "Licensed under Apache License v2.0" .)"
+if [[ -n "$NON_LICENSED_FILES" ]]; then
+  printf "\033[0;31mmissing headers!\033[0m\n"
+  printf "$NON_LICENSED_FILES\n"
+  exit 1
+else
+  printf "\033[0;32mokay.\033[0m\n"
 fi