diff --git a/.travis.yml b/.travis.yml
index 856d6d6..298d2ec 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -37,7 +37,7 @@ script:
    fi
 
 before_cache: |
-  if [[ "$TRAVIS_RUST_VERSION" == nightly ]]; then
+  if [[ "$TRAVIS_OS_NAME" == "linux" && "$TRAVIS_RUST_VERSION" == nightly ]]; then
     RUSTFLAGS="--cfg procmacro2_semver_exempt" cargo install cargo-tarpaulin
   fi