diff --git a/.travis.yml b/.travis.yml
index d038692..29a7095 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,7 +22,9 @@ env:
 
 install:
 - if [ "$TRAVIS_RUST_VERSION" == "nightly" ]; then rustup target add wasm32-unknown-unknown; fi
+- rustup component add rustfmt
 script:
+- cargo fmt --all -- --check
 # Make sure nightly targets are not broken.
 - if [ "$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