diff --git a/.travis.yml b/.travis.yml
index e95df823..0a1f6a0c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,7 @@ script:
   - cargo build --verbose
   - cargo test --verbose
   - cargo doc --verbose
+  - ([ $TRAVIS_RUST_VERSION != nightly ] || cargo test --verbose --features serde-serialization)
   - ([ $TRAVIS_RUST_VERSION != nightly ] || cargo test --features heap_size)
 
 after_success: |