diff --git a/.travis.yml b/.travis.yml
index 68a5cda..be29218 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -25,6 +25,8 @@ script:
 # Make sure nightly targets are not broken.
 - if [ "$TRAVIS_RUST_VERSION" == "nightly" ]; then cargo check --tests --manifest-path=fuzz/Cargo.toml; fi
 - if [ "$TRAVIS_RUST_VERSION" == "nightly" ]; then cargo check --benches --manifest-path=benches/Cargo.toml; fi
+# Make sure `no_std` version checks.
+- if [ "$TRAVIS_RUST_VERSION" == "nightly" ]; then cargo +nightly check --no-default-features --features core; fi
 - ./test.sh
 - ./doc.sh
 after_success: |