diff --git a/.travis.yml b/.travis.yml
index 424465ebf..ffe05ec6c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -168,7 +168,8 @@ script:
   - if [ `which valgrind` ]; then
     valgrind --error-exitcode=1 --leak-check=full ./json_unit ;
     fi
-  - if [ $TRAVIS_OS_NAME="osx" ]; then
+  - if [ `which brew` ]; then
+    brew update ;
     brew tap nlohmann/json ;
     brew install nlohmann_json --HEAD ;
     brew test nlohmann_json ;