diff --git a/.travis.yml b/.travis.yml
index 5919ba6d..99a4c47f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,7 +10,7 @@ sudo: true
 dist: trusty
 before_install:
   # as per a number of comments online, this might mitigate some flaky fails...
-  - sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 0C49F3730359A14518585931BC711F9BA15703C6
+  - if [[ "$TRAVIS_OS_NAME" != "osx" ]]; then sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 0C49F3730359A14518585931BC711F9BA15703C6; fi
   # apt update tends to be flaky in travis, retry up to 3 times on failure
   # https://docs.travis-ci.com/user/common-build-problems/#travis_retry
   - if [[ "$TRAVIS_OS_NAME" != "osx" ]]; then travis_retry travis_retry sudo apt update; fi